Air conditioner in vertical window: Best Sliding Window Air Conditioner 2023 ~ Top Vertical ACs

Best Sliding Window Air Conditioner 2023 ~ Top Vertical ACs

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Table of Contents_

  • Top 10 Best Air Conditioners for Sliding Window
  •  #1  Frigidaire FFRS1022R1 Sliding Window Air Conditioner
  •  #2  PerfectAire Sliding Window Air Conditioner
  •  #3  Frigidaire FFRS0822SE Sliding Window Air Conditioner
  •  #4  Koldfront CAC8000W Sliding Window Air Conditioner
  •  #5  Keystone KSTSW10A Sliding Window Air Conditioner
  •  #6  Midea KAW10C1AWT Sliding Window Air Conditioner
  •  #7  Arctic King Sliding Window Air Conditioner
  •  #8  Haier QPCA10YZMW Sliding Window Air Conditioner
  •  #9  LG LP0817WSR Air Conditioner
  •  #10  Honeywell MN10CESWW Sliding Window Air Conditioner
  • How We Decided
  • Best Air Conditioner for Sliding Window Buyer’s Guides
  • The Most Important Factors to Consider

When you’re shopping for the best air conditioner for sliding windows, you’ll need to think about whether you want a mounted window AC or a portable air conditioner. Always think about the size of the space you want to cool and pick a unit with a BTU rating that is compatible with that space. Next, think about energy efficiency as well as how easily a unit can move air through the room — known as the CFM. Finally, consider whether you want additional features like a dehumidifier or a unit that can be window mounted or installed through the wall if you need more versatility. These are great to think about, so you can choose the air conditioner that will fit your needs.

FRIGIDAIRE FFRS1022R1 10000 BTU 115-volt…

PerfectAire 10,000 BTU Slider Air Conditioner…



Frigidaire FFRS0822SE Window Air Conditioner, 8000…


After conducting thorough research through countless consumer reviews, we nominated the Frigidaire FFRS1022R1 Sliding Window Air Conditioner as our Top Pick. Keep reading to learn more about our research criteria and to shop from our recommendations of the best air conditioners for your needs.

Top 10 Best Air Conditioners for Sliding Window

 #1  Frigidaire FFRS1022R1 Sliding Window Air Conditioner

Our #1 Pick is the Frigidaire FFRS1022R1 Sliding Window Air Conditioner


WHY WE LIKE IT: A powerful casement air conditioner that’s perfect for rooms up to 450 square feet with a solid 3.4-pint per hour evaporation rate and a low energy consumption thanks to a 10.4 EER rating.


  • Ideal for areas up to 450 sq. ft.
  • Includes dehumidifier for 3.4 pints/hr
  • 10.4 EER, 323 CFM


  • Higher noise output at 61dB

Frigidaire is another great brand that’s known for making home appliances that are designed to last. The FFRS1022R1 is a casement air conditioner that can offer 10,000 BTUs and cool rooms as large as 450 square feet. As is standard, the window air conditioner installation kit for sliding windows is included. We also like that you get a 10.4 EER. While that’s not the highest energy rating, it’s in the top range for this product category. But more impressive is the 323 CFM maximum output which ensures that air is efficiently being moved through the room.

Although this Frigidaire window AC has a higher noise output of 61 decibels at the maximum speed, you still get plenty of key functionality. This includes three cooling and three fan speeds, and a dehumidifier mode. The dehumidifier has an evaporation rate of 3.4 pints per hour, which is in the median range. And you’ll also get a removable filter that can be washed to ensure air quality. Feel free to also compare this Frigidaire model with the best LG air conditioners on the market.

 #2  PerfectAire Sliding Window Air Conditioner

222 Reviews

Our #2 Pick is the PerfectAire Sliding Window Air Conditioner


WHY WE LIKE IT: A vertical air conditioner with a smart Follow Me feature that relies on the remote’s location to gauge temperature, can be installed in windows or through the wall for added versatility.


  • Includes Follow Me function for better cooling
  • 10,000 BTUs for 400 – 450 sq. ft.
  • 10.4 EER


  • Louder noise output at 61dB

Not everyone likes the idea of limiting window functionality by installing a window air conditioner there. So, we’re including the PerfectAire vertical air conditioner because it’s designed so that it can either be installed in a window or through a wall. It’s probably a great through-wall air conditioner since it’s so versatile. While you’ll need to make sure you also have a sleeve to support proper installation, we think this versatility gives this pick an edge up on the competition. With 10,000 BTUs you can cool rooms from 400 to 450 square feet. This model has a 10.4 EER which makes it fairly efficient.

We also like that it comes with a Follow Me function. This is important because it means that your air conditioner is gauging the temperature based on where the remote is in the room, rather than solely reading the temperature of the air immediately around the unit. As is fairly standard, you’ll get three cooling and three fan speeds, along with a sleep and energy efficiency mode. Note though, that this is one of the louder units with a 61-decibel rating when set to maximum output. You may prefer the best tower air conditioner that features a low sound output and white noise functionality.


 #3  Frigidaire FFRS0822SE Sliding Window Air Conditioner


145 Reviews

Our #3 Pick is the Frigidaire FFRS0822SE Sliding Window Air Conditioner


WHY WE LIKE IT: A complete sliding window air conditioner kit that’s perfect for smaller rooms up to 350 square feet with a solid 263 CFM rating and a higher energy efficiency score of 10.9 EER.


  • 8,000 BTUs for up to 350 sq. ft.
  • 10.9 EER, 263 CFM
  • Lower noise output of 55.1 dB at maximum speed


  • Lower evaporation rate of 3 pints per hour

The Frigidaire FFRS0822SE sliding window air conditioner kit is another great option from a reliable home appliance brand. This model offers 8,000 BTUs of power to cool rooms as large as 350 square feet. You’ll also get a 10.9 EER rating which is on the higher end for energy efficiency in this product category. We like the 263 CFM rating which is fairly efficient at moving air through a room. And with a decibel output that ranges from 48.4 to 55.1 decibels depending on the speed setting, this is one of the quietest options that we found in our research. We also compared aluminum vs copper coils on air conditioners so you’ll see which one is the better buy.

You’ll like that this is a three-in-one casement air conditioner that includes cooling, a dehumidifier, and a fan. The dehumidifier can remove up to three pints per hour. Compared to evaporation rates with competitive products, it’s in the medium range for efficacy. But that still amounts to a maximum of 72 pints of water removed from the air for someone who runs their air conditioner all day. Other standard features include a sleep mode and an energy-saving option. You may compare this with other energy-efficient units from the best window air conditioners.

 #4  Koldfront CAC8000W Sliding Window Air Conditioner

245 Reviews

Our #4 Pick is the Koldfront CAC8000W Sliding Window Air Conditioner


WHY WE LIKE IT: A horizontal sliding window air conditioner kit with 8,000 BTUs and a smart Energy Saver mode that helps reduce power consumption while maintaining a comfortable room temperature.


  • 11 EER, 235 CFM
  • Low 55 dB output
  • 8,000 BTUs


  • Brand fails to provide specifications for evaporation rate

For most people, outside of housing expenses, their energy bills represent the next largest expense for the home. So, energy efficiency and a smart energy saver mode that can help to better control energy consumption are essential features to keep in mind. The Koldfront CAC8000W window air conditioner comes with a horizontal sliding window air conditioner kit. You’ll get 8,000 BTUs that are rated to cool spaces from 300 to 350 square feet.

With 11 EER and 235 CFM ratings, this is a fairly efficient air conditioner solution. This casement window AC has one of the best Energy Saver and Sleep modes that we found in our research. Koldfront’s Sleep mode adjusts the temperature by two degrees periodically and then returns to the originally set temperature every six hours. Meanwhile, the Energy Saver mode cycles the fan for two minutes at 10-minute intervals until the ambient temperature rises above the temperature you originally set — at which point the cooling setting is triggered. With a 55-decibel output in the maximum setting, this is one of the quietest options for this product category. However, even though the brand promotes the dehumidifier setting, they fail to share the evaporation rate. For those that live in drier climates like the Southwest where the humidity levels are low, the best evaporative air conditioner is a perfect choice.

 #5  Keystone KSTSW10A Sliding Window Air Conditioner

53 Reviews

Our #5 Pick is the Keystone KSTSW10A Sliding Window Air Conditioner


WHY WE LIKE IT: A solid air conditioner choice for people with rooms up to 450 square feet thanks to the 10,000 BTU rating and the 200 CFM and 10.8 EER ratings.


  • 200 CFM, 10.8 EER
  • 10,000 BTUs for up to 450 sq. ft.
  • 3 fan and 3 cool speeds


  • Lacks an auto shut-off feature

You’ll find that many window AC units are designed with medium-sized rooms in mind. The Keystone KSTSW10A casement air conditioner is a great option for rooms up to 450 square feet thanks to the 10,000 BTUs of power. With a 10.8 EER, this is a fairly energy-efficient option. While 200 CFM isn’t the highest option from our research — or even in our guide — it’s in the median range and should still be sufficient even for medium-sized rooms.

In terms of functionality, this Keystone unit offers competitive options like an energy saver and sleep mode. You’ll also get a remote control, as well as three cooling and three fan modes. While this pick lacks a timer, auto-shutoff, or app integration, we still think it’s a solid choice for anyone who needs a straightforward casement air conditioner that comes with an installation kit. These kits are important even when installing the best through-the-wall air conditioner.

 #6  Midea KAW10C1AWT Sliding Window Air Conditioner


WHY WE LIKE IT: A highly energy-efficient window AC unit with an 11.4 EER, 10,000 BTUs for up to 450 square feet of space, and four-way air directional controls for better comfort.


  • 10,000 BTUs for up to 450 sq. ft.
  • 4-way air directional controls
  • Includes washable filter


  • Higher noise output at 61dB
  • Only 1 cooling setting

We can’t stress enough that energy efficiency matters. And one of the best ways to make sure that your air conditioner doesn’t cause expensive spikes in energy consumption is to focus on the EER. This Midea KAW10C1AWT air conditioner has an 11.4 EER, which is one of the highest that we found in our research. You’ll get 10,000 BTUs of power which is rated to cool spaces up to 450 square feet.

This casement unit features a four-way air direction for improved airflow. As is standard, this pick comes with a remote control, an energy saver mode, and a sleep mode. You’ll get a removable and washable filter for improved air quality. However, we did note that this pick only features one cooling speed but does have three fan speeds. For keeping cool while summer camping, you should take a peek at the best portable AC for camping.

 #7  Arctic King Sliding Window Air Conditioner


WHY WE LIKE IT: A simple casement air conditioner without complicated controls that are perfect for offices up to 450 square feet thanks to 10,000 BTUs as well as three fan and cooling speeds.


  • 10,000 BTUs
  • Comes with a remote
  • 3 fan and 3 cooling speeds


  • Installation can be difficult and is best with two people

Office environments may not need an air conditioner with all the bells and whistles. Instead, they just need something effective at cooling a space while also being energy efficient. The
Arctic King AKSC10CR51 air conditioner gives you 10,000 BTUs of power which is rated to cool spaces up to 450 square feet.

This casement unit comes with the installation kit and offers a four-way air direction for better airflow. Standard features include remote control, energy saver mode, and a sleep mode. You’ll also have three fan speeds and three cooling speeds. And you can also remove the washable filter to improve air quality. Unfortunately, this brand failed to share important specifications such as the CFM, EER, or evaporation rate. And we did note through our research that trying to install this unit with just one person can be a chore. So, you’ll want to have an extra set of hands when you purchase this product. An installation kit would be great, like the one that comes with the best ductless mini-split air conditioner.

 #8  Haier QPCA10YZMW Sliding Window Air Conditioner


WHY WE LIKE IT: An affordable portable AC unit that’s designed with an extended length window kit and 10,000 BTUs to cool rooms up to 350 square feet.


  • Includes extended length window kit
  • 10,000 BTUs for up to 350 sq. ft.
  • 230 CFM,


  • Low 6.8 EER
  • Low 2.7 pint/day evaporation rate

If you’re shopping on a budget but also need to buy an air conditioner for a sliding window, the Haier QPCA10YZMW portable air conditioner should be at the top of your list. This portable AC is designed with 10,000 BTUs of power to cool rooms as large as 350 square feet. With a 6.8 EER, that’s the lowest energy efficiency we found in our research. Likewise, while this pick does come with a dehumidifier, it only offers a low 2.7 pint per hour evaporation rate.

Still, you’ll get 230 CFM, which is fairly powerful considering the BTUs and compatible room size. Most importantly, this Haier pick comes with an extended-length window kit that measures up to 48 inches, making it ideal for sliding windows. You’ll appreciate the LED control panel with capacitive touch, although you do get a remote control as well. You’ll have access to auto restart, a 24-hour timer, a removable washable air filter, and three cooling and three fan speeds. And the best dual hose portable air conditioner also has a carbon filter for improved air quality.

 #9  LG LP0817WSR Air Conditioner

We’re sorry, this product is temporarily out of stock


WHY WE LIKE IT: One of the best portable air conditioners with a streamlined control panel that’s perfect for small rooms thanks to the 8,000 BTUs designed to cool rooms up to 200 square feet.


  • Streamlined LCD temperature control panel
  • 8,000 BTUs
  • 8.2 EER, 220 CFM


  • Doesn’t support smart integration

If you don’t know how to install a portable air conditioner in a horizontal sliding window, it’s easier than you think. The installation kit comes with a panel that easily fits sliding windows. If you have a smaller room, you’ll appreciate the LG LP0817WSR. We think it’s one of the best portable air conditioners from our research because it’s budget-friendly while being effective and easy to install. You’ll get 8,000 BTUs to cool smaller rooms up to 200 square feet. Because it’s a portable air conditioner, it can work with vertical windows too.

You’ll get 8.2 EER for energy efficiency, which is in the medium range, along with a 220 CFM. But you’ll like the sleek design which includes a control panel with an LCD temperature display. The LG portable window AC unit is a three-in-one solution that includes cooling, a dehumidifier, and a fan function. The dehumidifier can remove up to 3.8 pints per hour, which is one of the highest we’ve seen in the sliding window category. You also get two fans and two cooling speeds. As for the best windowless air conditioner, you will need one that’s compatible with your dimensions and renovation limitations.

 #10  Honeywell MN10CESWW Sliding Window Air Conditioner

2,530 Reviews

Our #10 Pick is the Honeywell MN10CESWW Sliding Window Air Conditioner


WHY WE LIKE IT: A portable air conditioner with 10,000 BTUs that’s rated for rooms up to 450 square feet with a dehumidifier and a solid 11.1 SEER rating.


  • 10,000 BTUs
  • 3 fan speeds, and dehumidifier
  • 174 CFM, 11.1 SEER


  • Low evaporation rate of 2.75 pints/hr

Hands down, portable air conditioners are going to be the easiest to install if you have sliding windows. Once you learn the gist about what a window air conditioner is, you’ll realize that a window unit won’t do very well with sliding windows. This is because the installation kit includes a narrow panel that can be configured vertically or horizontally. The Honeywell MN10CESWW is our Top Pick because we think it’s a solid choice for anyone who has sliding windows, wants to install an air conditioner, but doesn’t want to deal with the hassle of traditionally mounted windows AC installations. With 10,000 BTUs, you can cool rooms from 350 to 450 square feet.

We like that this pick has an 11.1 SEER rating which is on the higher end for window air conditioner efficiency ratings. However, we did note that the 174 CFM rating is somewhat low within this product category. Likewise, while you do have a dehumidifier feature, it only removes 2.75 pints per hour, which is relatively low for this category as well. Still, you’ll get three fan and cooling speeds and a modern digital touch control panel, along with a remote. As is standard, the filter is removable and washable. The best portable air conditioners and heaters will also feature mesh or removable washable filters that keep the air clean.

Related: Check out the best central air conditioners that feature high energy efficiency ratings.

How We Decided

If you have horizontal sliding windows, you know that you can’t pick out a standard window air conditioner. Also known as a casement air conditioner, sliding window air conditioners are designed to be narrower to fit smaller dimensions. To create our guide for sliding window ACs, we focused on BTU ratings, design, efficiency ratings, programmability, and additional features.

You’ll find that all of the picks in our guide ranged from 8,000 to 10,000 BTUs. within this range, you’re most likely to efficiently cool rooms between 200 to 450 square feet. But to ensure the best airflow, look for models with higher CFM ratings. In our guide, the majority of the CFMs were between 200 to 250, which is fairly solid for window air conditioners.

Since none of our picks included supplemental heat, we solely focused on the EER/SEER ratings. In our guide, the energy ratings ranged from as low as 6.8 to as high as 11.4. As a general guide though, you should prioritize higher EER/SEER numbers as those will be more efficient.

But you should also consider the air conditioner design. With sliding windows, you don’t have to rely on a casement air conditioner that must be mounted. You can also opt for a portable air conditioner that comes with an installation kit that includes a panel. As long as you ensure the panel fits the height of your window, you should be fine.

And finally, we looked at programmability and if there are any special features. Most of our picks came with a sleep mode and an energy saver mode, both of which can help to reduce overall power consumption. But we also focused on models that had a built-in dehumidifier function — also known as a dry mode. Where available, we listed the evaporation rate, which is always listed in pints per hour and references how much moisture the dehumidifier can remove from the air.

Best Air Conditioner for Sliding Window Buyer’s Guides

The Most Important Factors to Consider

  1. BTU Rating
    Before you buy any window AC for a sliding window, begin with focusing on the BTUs or “British Thermal Units”. BTUs reference how effectively a window air conditioning unit for sliding windows can heat or cool air within a specific amount of square footage. Larger rooms will require more BTUs. Depending on the space you need to heat or cool, you can find window units for sliding windows containing BTUs that range from as little as 6,000 to as much as 36,000 BTUs.
  2. Design
    Vertical window air conditioners are thinner and taller than a traditional window unit used with a hung window, in case you’re wondering how heavy a window air conditioner is. This is because in this context, “sliding windows” means that your window opens by sliding horizontally (right to left or the reverse) as opposed to vertically (up and down).
    • Moreover, air conditioners for sliding windows give you more flexibility than a horizontal window unit.
    • That said, if you have casement windows, you’ll benefit from a sideways window AC unit or rather, a vertical window AC unit. These units also come in different sizes, so check the dimensions of your own windows and keep in mind that the smallest window air conditioner can fit smaller window sizes.
    • AC units for windows are more stationary than a portable unit, so keep in mind the range and power of the window unit.
    • If it doesn’t stretch as far as you need it to, we recommend you check out the best portable AC too.
    • And, if you’re storing a window unit for the winter, we have a guide to help you do it right.
  3. Efficiency Ratings
    There are a few key efficiency ratings that you need to prioritize when considering an AC for side sliding windows — CFM, EER/SEER, and potentially the HSPF if you want an air conditioner with supplemental heat. The CFM or cubic feet per meter rating determines how efficiently air conditioners circulate air in a room. The higher the CFM rating, the better airflow is produced by an AC unit for a side sliding window. The EER, SEER, and HSPF all determine the vertical AC window unit’s efficiency at consuming power. For example, check out our Bryant air conditioner review for a 17 SEER unit that efficiently cools your home.
    • Look for options that feature an Energy Star symbol. A higher figure means that a window AC unit for a sliding window is more efficient, and is less likely to produce unexpected energy consumption spikes — assuming the wiring in your home or apartment is properly installed and maintained. If you notice sudden energy bill spikes, something may be off with the performance of the unit and needs to be fixed, though sometimes resetting the unit resolves these issues, if you already know how to reset an air conditioner.
  4. Programmability
    While a control panel and full-function remote control are fairly standard, these days people also want smart integration with their side sliding window air conditioner. This can include proprietary apps that allow you to monitor and adjust temperatures through Wi-Fi connectivity on your smartphone or smart assistant-compatible units that can be paired with voice assistants like Alexa, Google Assistant, or Apple Home.
  5. Additional Features
    A nice feature that’s not required but helpful can be a dehumidifier. This function removes humidity from the air and can help to naturally reduce the temperature without running the cool settings at a higher level or temperature. You can also use the “dry mode” setting on your unit to get rid of excess humidity, which you can learn more about if you’re wondering what is the dry mode on AC units. Supplemental heat is another nice option that can be ideal if you live in a region where a traditional heating system isn’t necessary or the existing heater isn’t as efficient as you would like.
    • Additionally, some units like the one in our Costway portable air conditioner review are versatile enough that they can be both installed in a window and used as a portable unit.

Top 7 Vertical/Casement Window ACs for Sliding Window 2022

Disclosure: PickHVAC is reader-supported. When you buy through links on our site. We may receive commissions at no additional costs to you.

The best casement window air conditioner models are quality ACs that fit casement and sliding windows. We have a great list of them below for you to review and choose one today, if you’d like to.

Plus, you’ll find a very handy window kit that allows you to use a portable air conditioner with a casement window.

Next is our Quick Picks list of the best casement window air conditioners for this year. There are bullet points with the essential specifications.

After that are Full Reviews of the best slim vertical window air conditioner models followed by more content to assist you in finding the right AC for your needs.

Buying tip: The minimum window opening width for these casement window air conditioners is 15 ½”. Knowing this allows you to measure your window and know the AC will fit before you buy!

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Top 7 Casement or Vertical Window Air Conditioners – Quick Picks

Here are overviews of each. The Full Reviews are found below for those who want to do further research before making a choice.



#1 Koldfront CAC8000W

  • 8,000 BTUs, 250-350 sq. ft. 
  • 20.8 X 14.5 X 23.5 Inches
  • Energy star, Remote

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#2 Frigidaire FFRS0822S1

  • 8,000 BTUs, 250-350 sq. ft. 
  • 23.5 X 14.2 X 20.2 Inches
  • Remote, 24H timer

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#3 PerfectAire 3PASC10000

  • 10,000 BTUs, 350-450 sq. ft. 
  • 23.5 x 14.5 x 20.5 inches
  • Remote, 5 modes

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#4 Frigidaire FFRS1022R1

  • 10,000 BTUs, 350-450 sq. ft. 
  • 23.5 x 14.5 x 20.2 inches
  • Remote, 24H Timer

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#5 Arctic King 10,000 BTU

  • 10,000 BTUs, 350-450 Sq. Ft. 
  • 23.5 X 14.6 X 20.9 inches
  • Remote, 5 Modes

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#6 Keystone 10,000 BTU

  • 10,000 BTU, 350-450 sq. ft.
  • 23.5 x 20.87 x 14.57 inches
  • Popular sliding window AC

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#7 Koldfront CAC10000W

  • 10,000 BTU, 350-450 sq. ft.
  • 23.5 x 14.5 x 20.87 inches
  • Remote plus Dehumidifier

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What is a Casement Window AC? Vertical AC?

See the picture below. But first, here are our terminology tips:

A casement window AC can also be called a:

  • Vertical window air conditioner, which is a reference to its shape being taller than it is wide
  • Horizontal window air conditioner, which is a reference to fitting in windows that open side to side, or horizontally, rather than up and down (vertically)
  • Casement air conditioner, because it they are commonly used in that type of window

Sliding window air conditioner, because they fit sliding windows that are quite wide

Vertical / Casement Window Air Conditioner Installation Overview

What’s the same? These units fit into the window opening and rest on the sill. Most of the unit is outside.

What’s different? Instead of having an edge on the top, like a standard window air conditioner, to rest against the inside of the sash, they have metal or plastic edges on the side – or in some cases a piece of plastic that fits over the unit to hold it against the insides of the window opening, preventing it from falling to the outside of the window.

Plus, there are no wings on the side to fill the gap. Instead, the installation kit that comes with your casement window AC will have material to fill the gap above the window. Generally, the kits consist of a plastic frame and flexible foam. You might have to cut the kit materials to produce a custom fit.

See the section below, How To Install A Window AC Unit In a Horizontal Sliding Window, for full details.

Sliding Window Air Conditioner Reviews

A limited range of window air conditioners for casement and sliding windows are made. Some of them are not high enough in quality to recommend them.

But our list contains highly rated models with proven performance and durability. There are 8,000 and 10,000 BTU models – manufacturers do not make vertical window air conditioner models in other sizes.

Remember 15 ½”: Regardless of their given width, the manufacturers of each recommend a window with a minimum opening of 15 ½” for these small vertical window air conditioner models.

#1 Koldfront CAC8000W 8000 BTU 115V AC

This is an 8,000 BTU Koldfront casement window air conditioner with basic features only. On the positive side, this is an Energy Star casement AC that delivers lower operating costs.

Compared with the Frigidaire model, it is an affordable sliding window air conditioner.

  • Width: 14.2 inches
  • Features: Full-function remote, Energy Saver mode, 3-speed fan.
  • Pros: Energy Star. Compact window AC.  Affordable. Positive ratings are 74% to 76%.
  • Cons: Doesn’t have a timer.

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#2 Frigidaire FFRS0822S1 8000 BTU AC

This Frigidaire sliding window AC removes 8K BTUs of heat per hour, so does a good job cooling space up to 350 square feet.

It has a good group of features. Here are the key points to consider.

  • Width: 14.2 inches
  • Features: 24-hour timer, full-function remote, Sleep mode, Energy Saver mode, 3-speed fan.
  • Pros: Narrow window AC, has all the features needed for convenience and making the room comfortable. Positive ratings are 73% to 77%.
  • Cons: Nothing major. Energy Saver mode reduces cooling, but that should be expected. You might want to use plexiglass instead of the foam supplied to fill the gap between the top of the AC and the top of your window opening. Negative ratings are about 12% to 14%. Many of them have to do with the unit being dented upon arrival, something Frigidaire seems to have addressed with better packaging.

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#3 PerfectAire 3PASC10000 Window AC

This 10,000 BTU casement window AC has a lot of features that improve indoor comfort. The remote includes a separate thermostat. This unit also has Follow Me mode (see the Koldfront AC description).

AC mode lowers the temperature. Fan mode moves the air and creates a little white noise.

Dry mode dehumidifies the room without cooling. It’s an ideal mode for cool, damp spring and fall days when you want to get rid of the clammy feeling. You can also choose Auto mode, which selects the best mode to meet the thermostat requirement based on indoor climate conditions.

  • Width: 14.5 inches
  • Features: Remote, auto-restart, Cool/Fan/Dry/Auto modes, Sleep Mode too, programmable timer.
  • Pros: This PerfectAire casement window AC is more compact than some 8,000 BTU models. It has the widest range of features available and is light. 67% to 70% of the reviews are positive.
  • Cons: Louder than most other casement window units. That is the biggest complaint, so this unit might not be the right choice for bedroom installation. About 15% of the reviews are critical.

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#4 Frigidaire FFRS1022R1 10000 BTU AC

This is from the same Frigidaire series as the unit above but in the 10,000 BTU slider window air conditioner size.

The Frigidaire 10,000 BTU window AC for horizontal windows has a full range of convenience and comfort features including a 24-hour timer that allows you to program when the unit runs.

The timer allows you to leave home with the unit off, and if programmed, it will come on and cool your space before you arrive. That’s the best way to reduce energy use and still have a comfortable room or apartment.

  • Width: 14.5 inches
  • Features: Remote, Programmable timer, 3-speed fan with Auto setting, Cool, Fan Only and Energy Saver modes.
  • Pros: Good climate control features, affordable cost for a 10K sliding window air conditioner. 77% to 80% of reviews are positive.
  • Cons: About 15% of the reviews are critical. The biggest concern is that it might be damaged on deliver. You can return it to Amazon for replacement or refund, but that’s an inconvenience.

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#5 Arctic King 10,000 BTU AC

This is the 10K BTU version of the Arctic King casement window air conditioner listed above. It operates on a standard 110-volt plug, so you won’t need to install a 220V outlet.

Like many window air conditioners, this one has a “slinger-up” ring that splashes water removed by the AC onto the outdoor coil/radiator for faster, more efficient cooling.

  • Width: 14.6 inches
  • Features: Remote, Follow Me mode on remote, multiple fan speeds, 24H timer, Auto/Cool/Dry/Fan/Sleep modes, dirty filter notification, Exhaust feature to remove polluted indoor air.
  • Pros: Good climate control features, affordable cost for a 10K sliding window air conditioner. 77% to 80% of reviews are positive. 70% of the reviews are positive.
  • Cons: Heavier than other 10K BTU gliding window models. Less than 20% of the ratings are critical.

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#6 Keystone 10,000 BTU Slider/Casement Window AC

Keystone is a brand that “flies under the radar” sometimes, but it is growing in popularity. The manufacturer is known for quality appliances at affordable costs, and this one is no different.

And as noted in the review below, it comes with excellent consumer ratings. It’s a newer model too, so if you want the latest in sliding window AC technology, it is worth a look. 

  • Width: 14.57 inches
  • Features: Remote, 3 fan speeds, Auto/Cool/Dry/Fan/Sleep modes, dirty filter notification, 
  • Pros: About 90% of users give this unit a positive rating, and that makes it one of the top rated sliding window air conditioners on the market. Features are about what you’d expect from good window ACs.
  • Cons: A few of the units arrive damaged from shipping, though still in working order. You have the option of returning it or using it as-is. This, of course, isn’t the fault of Keystone, but typically the shipping company. And by the way, this can be true of absolutely and product, especially heavy ones, shipped from any seller.

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#7 Koldfront CAC10000W 10000 BTU 115V Casement Air Conditioner

The dehumidifier on this Koldfront window AC for sliding windows is useful on cool, damp days. It doesn’t cool off the room, but it does take the dampness/humidity out of the air, so the room doesn’t feel “clammy” anymore. 

That’s the value of ACs with dehumidifier mode – which is often referred to as “dry mode.” They are worth considering in climates with cool, damp spring and fall weather (or winter, if your climate is generally mild). 

  • Width: 14. 5 inches
  • Features: Digital AC display for accurate temperature setting. Dehumidifier. 3 fans speeds for versatile cooling. Sleep mode included plus energy saver mode to lower energy costs. The remote has a 16-foot range, good enough for most rooms this sliding window AC is suitable for.
  • Pros: More than 90% of reviews from verified users are good or excellent. It has all the features you’d expect in a quality vertical window AC. Plus, it is a fairly new model, so has all the latest technology and efficiency features. 
  • Cons: While the energy saver mode reduces energy use – and therefore energy costs – you might find that it won’t adequately cool the space in very warm, humid weather. 

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The Cooling Size Range For Vertical Window AC Is Narrow

The fact is that you only have two choices in casement window air conditioner size:

  • 8,000 BTU designed for 300-350 square feet. Ex: 15’ x 20’ / 18’ x 18’
  • 10,000 BTU for 400-450 square feet. Ex: 20’ x 20’ / 30’ x 15’ / 28’ x 16’

What if the room is smaller?

You have a few options.

First, if the room is quite hot – on a second floor and facing west or south, in other words, getting a lot of sun, then an 8,000 BTU unit might not be “too big” for the heat, even if it seems oversized for the square footage.

Secondly, you could run the AC on the low AC setting, and it probably wouldn’t be too cold.

Thirdly, consider a portable air conditioner. They are available in sizes for smaller rooms from 100 square feet to 300 square feet.

Suggesting a portable AC raises an obvious question…

Do Portable AC Window Kits Fit Sliding and Casement Windows?

Sliding, yes, but for a casement window, you will probably need a window kit designed specifically for them. Read on, because we have found one.

Sliding windows: They probably will, especially if you have or buy one with a kit that is adjustable in length. Worst case scenario is that you might have to modify its length slightly. Just as with an up/down sash window, close the sliding window to fit tight against the firm plastic piece that the hose fits into.

Most window kits are at least two pieces. You might have to tape the assembly together at the right length.

If you’re unsure if your portable AC window piece will work, consider this universal kit made to vent a portable room AC out a sliding window.

Casement windows: These present more of a challenge due to the way they operate.

No fear! We are always looking for useful products to make things work for our readers.

We have located a window kit to connect a portable air conditioner to a casement window. There are a few of them on the market – here is the best, a flexible cover that nicely bridges the gap and allows you to vent a portable AC out the window.

Notes – This alternative window kit will also work for most awning and hopper windows. You might have to use a little additional material to close gaps on whatever window you install it with, and it is affordable and effective.

How To Install A Window AC Unit In A Horizontal Sliding Window

Most of the kits included with sliding window ACs fit windows from about 38” to 40” tall. For example, the Koldfront 8,000 BTU unit in the list above fits windows with a maximum height of 39 7/16”. The PerfectAire 3PASC10000 unit has a max. window height of 39 1/2″.

My window is shorter – No problem. The kits are adjustable, so shorter is OK, as long as the window is the minimum height necessary. That information can be found on the Amazon product pages we’ve linked to above for each model.

My window is higher – You can install the window kit, but you will have to fill in the space above it using plexiglass or thick plastic and duct tape.   

Installation: The installation manual that comes with your vertical/casement/sliding window air conditioner should be quite detailed.

Installation varies slightly by manufacturer for narrow / small vertical window air conditioner units. But here are the main steps to follow for most brands.

1). Unpackage the AC to make sure all the parts are in the box including the window kit parts – and locate the installation manual or section within the owner’s manual.

2). Read over the installation section while examining the window kit, so that once you begin, you’ll already know what you’re doing.

3). Build the support platform using the pieces, usually 2, that are included, and place the platform in the window. It should slope slightly toward the outside, so that condensate from the AC will run outside. If the slope is wrong, adjust the support bar of the platform, and try it again.

4). Secure the platform in the window using the included screws. You should still be able to adjust its slope using an adjustment bolt on the top of the platform.

Drilling Tip: Mark the holes, take out the platform and pre-drill the holes. Then re-install the platform, and install the screws.

Siding Tip: To prevent the outside leg of the bracket from scratching your siding, place a piece of 1” x 2” wood between the bracket and siding. A small screw might be included to secure the wood and protect your siding.

5). Attach a bottom sealing strip, if included. This rubber-like strip prevents moisture and air from leaking into your home beneath the AC. If your kit doesn’t have one, you can attach foam weatherstripping to the bottom of the AC either at this point or once it is installed (more details later).

6). Install the window panel frame onto the AC. You might have to use a hacksaw or heavy-duty utility knife to shorten the side panels. Measure the height of the window from the platform you installed to the top of the window opening. Then, subtract the height of the AC. Your result is how long the sides of the window panel frame should be.

7). Place the window panel inside the panel frame – it should slide easily into the channel or grooves in the sides of the frame.

8). Attach any fittings or channels to the sides of the AC with the included fasteners.

9). Slide the adjustable legs of the panel frame down into the grooves or channels you just installed on the sides of the AC unit. The bottom of the panel should rest on top of the air conditioner.

Tip: Stop and evaluate:  First, there should be a platform and bracket secured into the windowsill. Secondly, the air conditioner should be on the floor or workbench with the window panel frame and panel secured to it.  

10. Attach weatherstripping to the back of the panel frame where it will contact the window jamb. If foam strips are included, you might have to cut them to fit each side.

11). With a helper, if needed, lift the sliding window AC into place, and set it on the bottom part of the window and tight against the side of the window frame, not in the center of the opening, as with a standard window AC.

12). Attach any security or locking brackets. Most sliding window AC installation kits come with optional brackets that can be used to prevent the AC from moving once in place. They provide safety for those in the house and help to prevent intrusion from outside the house.

Final Steps – Use weatherstripping to close air gaps. This will improve your indoor climate control when running the air conditioner, and it will run more efficiently when outside air isn’t leaking into the space.

Is there a Casement/Vertical Window AC with Heat?

No, unfortunately, there isn’t.

What are your best options?

1 – Buy a casement window air conditioner plus a space heater.

2 – Choose one of the portable air conditioners that have heat. This unit comes in two sizes that have heat.

3 – Consider a wall AC with heat. Also called through-the-wall air conditioners, these units fit into a custom-cut hole that is fitted with a steel sleeve for semi-permanent installation. This high-quality Koldfront unit comes in 4 sizes to consider from 8,000 to 14,000 BTU, each with a wall sleeve included.

As Casement ACs Are More Expensive, Can I Install a Standard Window AC in a Casement or Sliding Window?

Yes, but only, of course, if the standard window air conditioner isn’t too wide! And that’s a big “if.”

In our research of nearly every window air conditioner currently manufactured, we discovered that the minimum width for the narrowest units is 16” or 17” if you remove the wings/side panels.

With the side panels in place, minimum width for small window ACs is 23”.

And, of course, you will need to customize a window panel to fill the gap above and around the AC. Clear plexiglass is best, but clear plastic is also used a lot.

And you’ll need good duct tape and weatherstripping to make the fitting as airtight as possible.

Can I Install A Portable AC in a Casement or Sliding Window?

Yes. Each window type requires a different installation method. There are more details up the page under the heading Do Portable AC Window Kits Fit Sliding and Casement Windows?

Sliding: The portable AC window kit should be usable in a sliding/gliding/rolling window.

If the kit you have doesn’t work, then here is a universal kit designed specifically for sliding/gliding windows.

Casement: Portable AC window installation kits are not at all designed for casement windows. However, as noted, we did find this window seal that fits over the opening sash of a casement window and attaches to the window frame too, creating a fairly tight seal.

Comparing a portable AC to an air conditioner for sliding window – Noise and Efficiency: Portable air conditioners are generally quieter than most casement air conditioner models. They run at levels of 43 to 55 decibels, depending on the model and compressor type. Casement/vertical window air conditioner units have noise levels around 60 decibels or higher. On the downside, you will get better energy efficiency with a window AC than a portable AC.

Written by Rene Langer

Rene has worked 10 years in the HVAC field and now is the Senior Comfort Specialist for PICKHVAC. He holds an HVAC associate degree from Lone Star College and EPA & R-410A Certifications.

top-11 rating according to KP

Window air conditioners are an excellent option for inexpensive climate control equipment. Air conditioners of this type are able to maintain the optimum temperature in rooms ranging from 10 to 40 sq.m. They are compact and easy to operate. The dimensions of most window air conditioners correspond to the size of a standard window.

The main difference between window-type air conditioners and split systems is the design, which consists of one working unit (monoblock), which is easily mounted in the window. Window air conditioner easily turns into a mobile one, it is enough to remove the device from the window of the apartment and install it in the window frame, for example, of a country house.

The monoblock is divided into two parts, one of which goes outside, and the second is inside the room. Parts of the window split air conditioner are separated by a sealed partition. The principle of operation is quite simple: the monoblock passes air through itself, cooling or heating it. To install the device, it is often not necessary to resort to the help of a specialist, but it is worth remembering that window air conditioner cannot be installed in a modern double-glazed window if an appropriate hole has not been prepared in advance.

Window air conditioners differ from their more modern counterparts, split systems, in high noise level, often in a small area of ​​the refrigerated room and a small set of functionality. The noise level varies from 43 dB to 61 dB. Window air conditioners are quite powerful and heavy structures: the average cooling flow power is 1460 W, the average weight is 25 kg.

In addition to the features directly related to the main purpose, modern air conditioners can also provide very specific functions: fresh air intake, vertical blinds drive, self-diagnosis, auto-restart, etc. For convenience, a remote control panel and a monitor with technical data.

It is worth paying attention to the most common refrigerants used in air conditioners: R22 and R410A. So, for example, the R22 refrigerant most common in window air conditioners is environmentally unsafe (it harms the ozone layer), but it is practical – in case of a leak, you do not need to change the entire refrigerant, just add the right amount. Its competitor – R410A combines three key advantages: efficiency, environmental friendliness and uniformity. However, this type of refrigerant is quite expensive.

Komsomolskaya Pravda ranked the best window air conditioners in 2023 and analyzed in detail the features of each.

Editor’s Choice

Axioma GSJC05-NM1A

Axioma GSJC05-NM1A. Photo:

A fairly popular model, which attracts attention with its compactness, mechanical control panels and multi-speed fans. Designed for rooms up to 20 sq.m. The main advantage of Axioma GSJC05-NM1A is the “auto-restart” function, in which the air conditioner automatically resumes operation after a power outage.

The body of the device is resistant to corrosion, which determines its practicality and durability. The environmentally friendly refrigerant R410A is used. The main disadvantage is the high noise level.

Main characteristics
Room area 20 sq. m.0031 Maximum noise level 54 dB
Airflow 3.6 cfm m/min
Weight 19kg
031 Refrigerant type R410A
Ventilation and dehumidification yes
Pros and cons

Timer, 2 fan speeds, auto restart, corrosion protection, size

Very loud

Top 10 best window air conditioners in 2023 according to KP

General Climate GCW-07CR

General Climate GCW-07CR. Photo:

The General Climate GCW-07CR air conditioner is designed for rooms with an area of ​​no more than 20 sq.m. The device cools and dries the air, controlled by a remote control. The on-off timer allows you to set the exact operating mode of the device.

Heavy machine, medium in size and volume. The model is distinguished by the presence of the “self-diagnosis” mode, thanks to which the user does not have to independently understand the malfunctions of the device or pay money to the master once again.

Main characteristics
Room area 20 sq. m. 31 Maximum noise level 48 dB
Airflow 5.833 cfm m/min
Weight 33 kg
Dimensions 45 x 34 x 53.5 cm
Refrigerant type R401
Ventilation and dehumidification yes
Pros and cons

Ease of use, timer, remote control, auto restart , self-diagnosis

Large, heavy, noisy, few functions, small footprint


Gree GJC12AF-E3NMNC1A. Photo:

Monoblock Gree GJC12AF-E3NMNC1A is designed for large rooms up to 35 sq.m. Due to the high power of the cooling flow, the air conditioner quickly cools the air in the apartment.

The device is equipped with an auto-on timer and an “auto-restart” function. After the power is restored, the device will start operating in the same mode as before the power outage. Thanks to auto-moving vertical louvers and four-sided distribution, the air flow in a large volume is distributed evenly throughout the room.

The machine consumes quite a lot of electricity due to the high power consumption during cooling. The refrigerant used is R410A, an expensive, environmentally friendly material with high operating pressures that requires a robust and reliable cooling circuit.

Main characteristics
Room area 35 sq. m.0032

1186 W
Maximum noise level 49 dB
Weight 46 kg
031 Refrigerant type R 410A
Ventilation and dehumidification yes
Pros and cons

Fast cooling, multi speed fan, 4 airflow directions, auto restart

Heavy, bulky and noisy, no remote control

Aerotek ACW-12

Aerotek ACW-12. Photo:

Monoblock air conditioner of impressive size with 12 operating modes. The device is extremely uneconomical in terms of energy consumption, but highly efficient in cooling the air. Most powerful airflow on the market today. The air conditioner differs from analogues in the system against the formation of ice. Self-diagnosis and intelligent control will be a pleasant and convenient bonus to the standard functions of microclimate control in the apartment.

Main characteristics
Room area 35 sq. m. 031 Maximum noise level 56 dB
Airflow 9.2 cfm m/min
Weight 38 kg
Dimensions 53.6 x 38.5 x 61 cm
Refrigerant type R410A
Ventilation and dehumidification yes 90 032
Pros and cons

Multifunctional, timer, night mode, self-diagnosis , intelligent defrost, auto restart, dust filter

High noise level, high weight, dimensions, high power consumption

Samsung AW 05 NOB

Samsung AW 05 NOB. Photo:

Samsung AW 05 NOB Window Air Conditioner is a lightweight and compact device with medium room cooling capacity and low power consumption. The air conditioner is designed for rooms with a small area – up to 15 sq.m. This model has an optimal set of necessary functions: cooling, dehumidification, operation in the exhaust ventilation mode.

Samsung AW 05 NOB mixes fresh air from outside with the air passing through the air conditioner thanks to the “air mixing” function, thus not only changing the temperature and humidity of the air, but also refreshing it. This function is quite rare, since the admixture complicates both the design of the air conditioner itself and its installation. The disadvantages of this window air conditioner include non-environmentally friendly and cheap R22 refrigerant.

Main characteristics
Room area 15 sq. m. 31 Maximum noise level 49 dB
Airflow 3. 8 cfm m/min
Weight 17.5 kg
Dimensions 43.5 x 28.3 x 32.6 cm
Refrigerant type R22
Pros and cons

Re airflow adjustment, antibacterial filter, light weight, compactness, air mixing, exhaust ventilation, two airflow directions

No remote control, small footprint, high noise level, non-environmental refrigerant


TCL TAC-05CW/A. Photo:

The TCL TAC-05CW/A window box is suitable for a room with a small area – 15 sq.m. The model provides cooling and dehumidification as standard. The power of the device is low, so the power consumption is low, the advantages are: low weight, multi-speed fan and the “auto-restart” function.

Night mode cools the air during the late hours, while the volume of the device is lower than usual. The air conditioner uses R410A refrigerant, which is safe for the ozone layer.

Main characteristics
Room area 15 sq. m. 31 Maximum noise level 53 dB
Airflow 4 cfm m/min
Weight 19.5 kg
Dimensions 47.5 cm
Refrigerant type R410A
Ventilation and dehumidification yes
Pros and cons

Timer, night mode, multi speed fan, auto restart

Small footprint , noise, low power, no remote control


KRAFT AW-12 GW/H. the cooling flow is quite small. However, the device is equipped with two important functions – normal and forced ventilation. At least the air in the room will be well ventilated.

The main disadvantage is the high noise level – 61 dB (similar to a TV operating at an average volume level). The cheap refrigerant R22, which is unsafe for the ozone layer, is used.

Main data
Cooling flow 1465 W
Cooling input 570 W 9003 2
Maximum noise level 61 dB
Airflow 3.67 cu. m/min
Weight 20 kg
Dimensions 41x30x34 cm refrigerant R22
Pros and cons

Compact and lightweight, forced ventilation , auto-restart, 2 fan speeds

Very noisy, no remote control, inefficient cooling, unsafe refrigerant, no information on allowable cooling space


AVEX WCH-05. Photo:

The only representative of mobile air conditioners in the AVEX WCH-05 rating has ideal dimensions for frequent transportation. Lightweight, compact air conditioner can be placed in a window or doorway, shaft, etc.

A simple device of medium power and high noise level, in addition to the standard functions of cooling, ventilation and dehumidification, air movement control can be added. For the operation of the air conditioner, ozone-friendly refrigerant R410A is used.

Main characteristics
Room area 15 sq. m. 31 Maximum noise level 55 dB
Airflow 3.67 cfm m/min
Weight 18 kg
Dimensions 41 x 30 x 34 cm
Refrigerant type R410A
Ventilation and dehumidification yes
Pros and cons

Airflow control, mobility

Small footprint , noise, no remote control, few functions and modes

Ballu BWC-05 AC

Ballu BWC-05 AC. Photo:

The Ballu BWC-05 AC multifunctional air conditioner is capable of operating in cooling and ventilation modes. The device is suitable for rooms up to 18 sq.m., does not create a lot of noise and does not take up much space. It is quite easy to control the air conditioner: in the arsenal of the device there is an LCD display and a remote control. The undoubted advantage of the air conditioner is the auto-adjustment of horizontal blinds.

The device itself diagnoses malfunctions and errors in its operation, purifies the air of dust and dirt thanks to the washing and anti-dust filters, and also maintains the optimum temperature in the room without the intervention of the owner. The disadvantages include the lack of an on and off timer, although the presence of a “night mode” will smooth out these shortcomings.

Main characteristics
Room area 18 sq. m.
Cooling flow rate 1460 W
Cooling power consumption 560 W
Maximum noise level 46 dB
Airflow 3.6 cu. m/min
Weight 19 Kg
031 Refrigerant type R410A
Air ventilation yes
Pros and cons

Remote control, LCD display, self-diagnosis, automatic temperature maintenance

No timer and dehumidification mode


LG W05LC. creates a comfortable microclimate in room up to 15 sq.m. The device is light and weak in power, while it cools the air in the apartment in a short time due to the fast air flow. Monoblock has an average noise level. The anti-corrosion coating of the air conditioner will extend its service life, and the antibacterial filter – the purity of the microclimate in the space.

Main characteristics
Room area 15 sq. m. 31 Maximum noise level 49 dB
Airflow 8.5 cfm m/min
Weight 20 kg
Dimensions 41 x 31 x 37 cm
Refrigerant type R22
Air ventilation yes
Pros and cons

Compact, anti-corrosion coating, antibacterial filter

Loud, small footprint , low power, no remote control


BALLU BWC-07 AC. Photo: yandex.

Monoblock multifunctional air conditioner of medium power and dimensions. Effective for cooling rooms up to 20 sq.m. Quickly cools the room using the ozone-friendly R410A refrigerant. The model is unique in the presence of a small screen on the indoor unit of the air conditioner. The display shows information about the set temperature, operating mode, timer settings, filter status, errors, etc. Remote control of the remote control simplifies the work with the device. The undoubted advantage of the air conditioner is the “Auto Swing” function. The device is equipped with an anti-dust washable filter “Dust stop”. The model is quite loud, but when you set the “sleep” mode at night, the sound will be quite quieter.

Main characteristics
Room area 20 sq. m. 31 Maximum noise level 49 dB
Airflow 5.8 cfm m/min
Weight 25 kg
Dimensions 53. 5 x 47 x 35.5 cm
Refrigerant type R410A
Ventilation and dehumidification yes 90 032
Pros and cons

Remote control, timer, auto-restart, informative LCD display, 3 airflow speeds, night mode

Big and noisy

How to choose a window air conditioner

Window air conditioners are not in high demand these days, so don’t expect a variety of colors and shapes on the shelves of home appliance stores. However, this has a significant plus – you do not have to stand at the counter for a long time in thought. However, some of the tips from the article are still better to use.

According to the CP, the ideal window air conditioner:

  • Cools efficiently and quickly. It is also desirable that he himself “understands” at what point to stop, and at what point to increase the power to full.
  • Compact and lightweight . The main advantage of a monoblock is its mobility. So that you can use one device to cool the apartment and, for example, take it with you to the country house for the weekend. Remote control, LCD display, various automatic mode settings will save valuable time.

For a deep analysis of the key characteristics, Komsomolskaya Pravda turned to an expert in the field of real estate repair, host of the Bad Repair program on the Aksenov-TV YOUTUBE channel Kirill Aksenov .

The first question to answer when choosing a window air conditioner: in what room will the air conditioner be installed, what is its area? The dimensions and power of the structure depend on the answer to this question. For a 15 sq. m, you can use an air conditioner with a capacity of 1.5 kW., but if the windows face the sunny side, then it is worth increasing this figure by 15%. When choosing an air conditioner, it is worth paying attention to the energy efficiency class: always choose an A + device and above.

If the room is small, then the size of the equipment is important: installing a large monoblock in a small room is fraught with the discomfort of being in the room when the mode is on, and dissonance in appearance. Particular attention should be paid to the installation process of the structure: follow the manufacturer’s recommendations during installation. Pay attention to the architecture of the building, its appearance: is it possible to use a window air conditioner.

Next you need to decide where you plan to install structure ? Inside the window opening or the bottom of the window? Depending on the answer, the functional characteristics of different models can be distinguished.

For example, if you plan to install an air conditioner in a window opening, it will be convenient to use a model with a remote control to switch operating modes and regulate operation in general.

When installed at the bottom of the window, it can be used without a remote control.

Modern designs of window air conditioners have different ventilation modes, humidity levels, remote control (smart home system), up-to-date design and the ability to heat the room, thanks to the reversible compressor option (but at a “gentle” outdoor temperature, up to -3 degrees Celsius). Celsius).

According to the expert, the main parameters when choosing:

  1. Room area
  2. Power/cooling capacity
  3. Noise level
  4. Energy efficiency class
  5. Assembly
  6. Additional options


What are the advantages and disadvantages of a window air conditioner?

Benefits of : Window air conditioners are usually installed in a window opening (hence the name) or a wall of a building, the width of which is not more than 30 cm. Their essential advantage is ease of installation and use. Demand for an affordable price (usually 30% lower than the cost of a split system) and simple maintenance.

More pluses: supply ventilation (this function is very rare in split systems and increases the cost of the product), lack of main elements, unpretentious operation, refrigerant leakage is practically excluded.

Disadvantages : Operation in the “warm” period; increased noise level; installation is not possible in all window frames; aesthetic component, not everyone likes such designs. If you like silence and do not allow extraneous noise, then it is better to choose a split system.

When does it make sense to install a window air conditioner rather than a split system?

Window air conditioner will significantly save the family budget and it will be relatively easy to install, which is suitable for those who want to do the installation themselves, says Kirill Aksyonov . But the choice is always individual.

How to maintain a window air conditioner?

On the outside, keep the structure clean: remove leaves in autumn, snow in winter – remove the effects of bad weather and the resulting debris. For cleaning, you need to open the external unit, if you can’t get to the metal blades, then at least gently wipe the surface. Everything should be clean and free of foreign objects, the expert recommends.

Follow manufacturer’s instructions for use. Filter cleaning should also be described in the product instructions: as a rule, it is cleaned in the spring and the monoblock is regularly wet cleaned. Heat exchanger plates made of metal are best washed with water. When cleaning the structure, be careful not to damage the parts.

As a rule, window air conditioners do not require “refilling”, due to the design features in general. To check the condition of the device, as well as maintenance, it is better to contact a specialist. It will not work to fill the air conditioner on your own, all connections are soldered, and if a leak occurs, then only the master will identify the leak and fix the problem.

Pros and cons of mobile air conditioners

Consider the pros and cons of mobile air conditioners, as well as some of the nuances of their use in everyday life and at work.

1. Mobility.

The main and indisputable advantage of a mobile air conditioner is its mobility. Most models can be transported in the trunk of a car or even in the cabin if the doorway allows. This quality of this device is very useful for those who rent housing or office space and are forced to change their place of residence from time to time. At the same time, due to the design features, damage to any parts of the mobile air conditioner is reduced to zero. In fact, if you do not physically damage a mobile air conditioner, then it will last for decades. At the same time, it is the design of a mobile air conditioner that creates additional restrictions during its operation.

2. Hot air outlet.

Without going into the complex, technical, issues of the device of a mobile air conditioner, let’s say it is simpler – any mobile air conditioner needs to remove heated air outside the room. This is perhaps the greatest difficulty in using a mobile air conditioner. The fact is that a special window adapter for air outlet is designed for use with windows where the window sash rises, and does not swing open inward, so you have to look for other solutions to this problem. It should immediately be noted that the option: “ we do not consider 0810 to bring the pipe into the ajar window , for the reason that the air conditioner, for its operation, needs an influx of air from the outside, therefore, during operation, it creates a reduced pressure in the room. Because of this, according to the laws of physics, the cooled air will tend to leave the room through a gap in the window and be replaced by hot air from the street, which makes the use of an air conditioner pointless or you need to purchase a device several times more powerful.

So what are the solutions to this problem:

a. Duct outlet to the ventilation shaft.

This is perhaps the most simple and effective solution, but with certain nuances. First, not all rooms have ventilation ducts. Secondly, the mobile air conditioner itself is quite bulky and there simply may not be room for it in a room with a ventilation shaft. In addition, if you plan to cool several rooms at once, you will have to purchase a more powerful device, otherwise the air conditioning compressor may not withstand high loads during continuous operation.

b. Hot air outlet through the sandwich panel of the balcony unit .

Also a good option, if it is possible to replace the installed sandwich panel with another one with a hole for the air duct. The sandwich panel itself is not expensive, while this solution allows you to disconnect the air duct from the sandwich panel of the balcony block at any time and move the air conditioner to the side. As practice shows, in most cases it is necessary to move the mobile air conditioner as soon as the outside temperature becomes lower. The solution with an additional sandwich door panel perfectly solves this problem.

c. The third most popular solution is the use of a standard double-glazed window with or plexiglass with a hole for the duct.

Just as in the case of a sandwich panel, you will have to replace the installed double-glazed window with a double-glazed window or simple plexiglass with a hole. The inconvenience of this method is that the double-glazed window of a standard window is quite an expensive and heavy thing, so out of season you need to find a place for it in the apartment, and plexiglass is very thin and is not designed for the glazing bead system of a plastic window, so you will need to use additional inserts to fix it in window opening. But, if there are no other options, then this option is preferable.

d. Zip bag for half-open window.

There is also a special plastic bag with a zippered hole, which must be pulled over the opening of an ajar window and unzipped to bring the air duct into this opening. The plastic base of the package should prevent hot air from entering the room, and the zipper allows you to choose any diameter of the hole for an air duct of any design. However, to fix this package, you need to glue it well with a special tape both to the window sash and to the window itself. At the same time, it will no longer be possible to open or close the window, since the constant peeling off of the package will lead to its poor fixation and the penetration of hot air into the room.

e. Standard window adapter included with air conditioner.

As a final solution for venting hot air from a mobile air conditioner to the outside, is to use a window adapter not in a horizontal position, but in a vertical one, just as in the previous case, opening the window sash, or installing it between the window panels (if sliding window system installed). The disadvantage of this design is that the adapter is not always long enough to completely close the gap formed, and if this is not done, then hot air will penetrate inside and reduce the efficiency of the air conditioner. In addition, you need to come up with ingenious ways to fix this adapter in a vertical position.

3. Condensate removal.

Condensation will always form during operation of the air conditioner. In split systems, it is brought out through a drainage pipe or into the sewer using a drainage pump. For mobile air conditioners, there are several solutions that depend on the model and manufacturer of the air conditioner. In the simplest models, condensate is collected in the air conditioner tank and will need to be drained from time to time. Additionally, some manufacturers complete with a special hose for condensate drainage, but this is an ineffective solution, since it is not always possible to bring the hose into the sewer system. In more advanced models, a special evaporator inside the mobile air conditioner removes condensate by heating it. This option is more preferable because it allows the device to work in a closed loop without human intervention.

4. Noise level.

This is the scourge of mobile air conditioners. Since, due to the design features, the compressor, radiator and fans are located in the same unit, the noise they emit is distributed from the same unit throughout the room. In split systems, the outdoor unit is located outside the room and therefore they are much quieter than mobile air conditioners. Unfortunately, there is no way to solve this problem, except to select the model with the lowest noise level. But, if you are a light sleeper, then with a working mobile air conditioner, no matter how quiet it is, it will be problematic to fall asleep.

5. Filter cleaning.

Since the design of the mobile air conditioner does not imply user intervention and the outdoor unit does not experience increased stress from seasonal leaf fall or the invasion of poplar fluff, its cleaning consists only in replacing the coarse filters. In principle, they do not even need to be changed, just rinse and dry. If the room is very dusty, then at intervals of about once a year, you need to clean the evaporator of the mobile air conditioner from dust. However, if the air conditioner is used in everyday life, then this procedure is extremely rarely necessary.

6. Air conditioners.

Separately, it should be noted that the article considered the nuances of using mobile air conditioners, that is, devices that are structurally similar to other air conditioners, but assembled in one case. At the same time, there is another type of mobile devices designed to cool indoor air called air conditioners. The principle of their operation is that the device passes air from the room through a tank of water, due to which it is cooled and moistened. If there are no questions about air humidification, then the cooling capacity, in devices of this type, is extremely low. Therefore, it would be wrong to recommend them for use in most of the territory of Russia, which is dominated by a continental climate.