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Casement Window Air Conditioner

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Models Considered

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I sn’t summer great? The birds are chirping, people are happier, but this doesn’t necessarily go for everyone as you are dealing with excessive sweating and torrid heat. However, with the addition of an AC system, you won’t need to worry your mind with these problems anymore as you can finally upkeep a cool environment indoors.

Similar to small window air conditioning system, window casement systems are very easy to use and install, so professional training or tools aren’t a requirement to set it up. Aside from this, you will find that their power delivers the needed efficiency to keep the space cool, while the smart features featured ensure functioning according to your needs and wishes.

14. Emerson Quiet Kool EARC5MD1 – Best for Office

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Specifications:


  • Cooling capacity: 5,000 BTUs
  • Room coverage: 150 square feet
  • Fan speeds: 2
  • Operating modes: Cool, dry, fan-only
  • Air direction control: 8-way
  • Energy efficiency ratio: 11.0

  • Moisture removal: 1.3 pints per hour
  • Noise level: 50 dB
  • Included installation kit:
  • Dimensions: 14.6” x 21.5 x 19.7”
  • Weight: 36.7 pounds
  • Warranty: 1 year full, 5 years for the sealed system





Rated at 5,000 BTUs, which ultimately makes it able to cover upward to 150 sq. ft., the Emerson Quiet Cool is made all the more appealing by the fact that it provides 8-way airflow louvers to grant full control over air direction. Additionally, it ensures even air distribution from one corner to another to cool down the living quarters ASAP.

Effortless Installation Process

Installation instructions are quite straightforward and the mounting kit in included with the purchase so that you can go ahead and set it up as soon as the package arrives at your door. Some of its design traits include:

  • Cooling Speeds2 levels provided for customizable comfort
  • Fan Speeds – Set it between low and high
  • Auto Restart – Restarts with the pre-selected settings
Multiple Operating Modes

By considering this model you will get the most for your money because you can make it work according to your needs. For example, the dehumidification mode will remove up to 1.3 pts./hr. to ensure elevated levels of air moistness at all times.

It’s important to mention that this is another Energy Star Rated model as it has a CEER rating of 11.0 and it draws only 3.9 amps. When you use it in the provided Energy Saver mode, it cools the room down in an even manner without consuming much power.


13. Keystone 5,000 BTU – Best for Small Apartments

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Specifications:


  • Cooling capacity: 5,000 BTUs
  • Room coverage: 150 square feet
  • Fan speeds: 3
  • Operating modes: Cool, dry, fan-only
  • Air direction control: 2-way
  • Energy efficiency ratio: 11.2

  • Moisture removal: 1.3 pints per hour
  • Noise level: 49 dB
  • Included installation kit:
  • Dimensions: 12.5″ x 16.25″ x 39″
  • Weight: 39 pounds
  • Warranty: 1 year full, 5 years for the sealed system





The 5,000 BTUs of this Keystone system make it suitable for cooling down areas of 150 sq. ft., which makes it a viable option for small condos, as well as the bedroom or a small living room. Moreover, the electronic controls and LED display enable ease of use, granting complete control over the system’s operation.

Dehumidifier Capabilities

Even though this comes at an affordable price for all, it is designed with numerous convenience features so that you get the most for your money. Some of its design features include:

  • Dehumidifier – It removes 1.3 per hour to ensure mold growth won’t be an issue
  • Air Flow – The adjustable 2-way air flow allows full control over air distribution direction so that you won’t have any hot spots in the room
  • Speeds – Features 3 fan speeds and 3 cooling speeds
  • Timer – Programmable up to 24 hours in advance
Buying Guide
  • Cubic Feet Per Minute Rating – On the highest setting the rating is of 129 cu. ft., on medium it’s of 112 cu. ft., and on the lowest the rating is of 100 cu. ft.
  • Noise – On the highest speed it produces a noise rating of 55 dB, on medium it’s of 52 dB, and on the lowest it produces 49 dB
  • Cord Length – 6.4 feet
Energy Saver Mode

If you want to run it non-stop, you can do so as the energy saver mode ensures it won’t draw much power so that costs are kept to a minimum. As a matter of fact, the estimated yearly cost is approximately $40, so you are likely to not feel a major difference when it comes to the energy bill (it is actually 11.2 rated for energy efficiency). Some of its convenience features are:

  • Auto Restart – If you’ve experienced a power cut, it automatically restarts with the pre-selected settings
  • Temperature Sensing Remote Control – Lets you check, set, and upkeep the temperature regardless of where you stand in the room
  • Antibacterial Filter – It is washable and reusable, and can capture contaminating particles from the air to leave it fresh and clean

It has been independently tested to prove its safety, the UL listing ensuring that you can run it without fear that unwanted incidents might happen down the road due to poor design or manufacturing.


12. Keystone KSTAW06B – Budget Pick

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Specifications:


  • Cooling capacity: 6,000 BTUs
  • Room coverage: 250 square feet
  • Fan speeds: 3
  • Operating modes: Cool, dry, fan-only
  • Air direction control: 2-way
  • Energy efficiency ratio: 11.2

  • Moisture removal: 1.5 pints per hour
  • Noise level: 49 dB
  • Included installation kit:
  • Dimensions: 15.7” x 18.5” x 13.4”
  • Weight: 52.8 pounds
  • Warranty: 2 years





The 11.2 EER rating ensures minimal impact when it comes to the energy bill. You can rely on it to cool a space up to 250 sq. ft. seeing how it is rated at 6,000 BTUs. Hence, it is suited for small to medium-sized rooms.

Adjustable Features

It features electronic controls that let you use it with ease even if you don’t have previous experience with air conditioning systems. Its design traits include:

  • Speeds – Choose between the 3 integrated speeds for flexibility in terms of cooling customization
  • Modes – The model can work as a fan and a cooler. Each mode has 3 individual speeds
  • Energy-efficient – Energy-saver mode lowers the working volume and it conserves energy

It’s essential to mention that it can work as a dehumidifier as well. It removes up to 1.5 pints of excess moisture so that you won’t be faced with mold infestation, all without having t separately acquire a dehumidifier for the task.

Automatic Restart

When a blackout occurs and the power comes back on, it automatically restarts with the pre-selected settings as to upkeep comfort levels without requiring you to reset them. It comes with an LCD remote control that flaunts temperature-sensing capabilities, which means that you can check the temperature from wherever you are in the room, and even adjust settings as you please, all without having to move an inch. Its particularities include:

  • Sleep Mode – When this mode is activated, it gradually adjusts room temperature to make as little noise as possible so that you can rest with the unit running in the same room as you
  • Mesh Filter – Removes large contaminants such as dust, pollen, or pet dander
  • Timer – Set it up to 24 hours in advance to benefit from its cooling performance according to your preferred schedule

It comes with a filter, but you needn’t worry about keeping a maintenance schedule separately as the indicator light lets you know when cleaning/changing is due. Another interesting aspect stands in the fact that the installation kit is included with the purchase at no extra price, so as soon as you receive the package you can move on to the installation part of the process.


11. Frigidaire FFRE0633S1 – Most Energy Efficient

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Specifications:


  • Cooling capacity: 6,000 BTUs
  • Room coverage: 250 square feet
  • Fan speeds: 3
  • Operating modes: Cool, dry, fan-only
  • Air direction control: 8-way
  • Energy efficiency ratio: 12.2

  • Moisture removal: 1.3 pints per hour
  • Noise level: 51 dB
  • Included installation kit:
  • Dimensions: 15.5” x 13.4” x 18.5”
  • Weight: 44 pounds
  • Warranty: 1 year full, 5 years for the sealed system





This 6,000 BTU system is compact enough to fit even awkward-size windows, all while its cooling capacity makes it suited for spaces of up to 250 sq. ft., ensuring it won’t take long for the room temperature to reach your selected setting. It is an energy-efficient model that is rated 12.2, so you can rest assured knowing that its operation won’t cost you much.

Antibacterial Mesh Filter

It features a reusable filter that serves the purpose of reducing bacteria, viruses, and fungus in the air that you breathe as it eliminates the contaminants from the air it pulls in while cooling. This makes it a viable option when flu season comes as, with less microorganisms in the air, chances are reduced for you to catch the illness while at home or the office, wherever you have installed the system. Its design features include:

  • Indicator Light – When the light comes on, it shows that filter cleaning is needed to upkeep optimal performance when it comes to removal of airborne particles from the air pulled in
  • Sleep Mode – It ensures comfortable sleep even in the same room with the system as it gradually adjusts its operation to reach the desired temperature
  • Dehumidifier – To ensure mold control, it wicks up to 1.3 pints of water per hour
Convenience in Use

It features ready-select controls that let you set the option you desire at the simple touch of a button so that regardless of how inexperienced you are, proper use won’t be much of a hassle. Another convenience-enhancing aspect stands in the included remote control that lets you change settings from across the room. Moreover, it produces only 51 to 55 dB when it runs, so chances are slim that you will even hear it run.


10. Arctic King AKSC08CR61 – Most Silent

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Specifications:


  • Cooling capacity: 8,000 BTUs
  • Room coverage: 350 square feet
  • Fan speeds: 3
  • Operating modes: AC, dry, automatic, Energy Saver, sleep
  • Air direction control: 4-way
  • Energy efficiency ratio: 11.4

  • Moisture removal: 0.9 pints per hour
  • Noise level: 48 dB
  • Included installation kit:
  • Dimensions: 15″ x 21″ x 24″
  • Weight: 72.4 pounds
  • Warranty: 1 year





The 8,000 BTU efficiency of the system makes it suited for larger-size rooms, while the 0.9 pints per hour dehumidification capacity ensures excess moisture will be gone so that you don’t have to worry about the apparition of mold or mildew. It even produces reduced noise when it runs, more precisely only 54 dB on the highest operating level, so it can be placed in the bedroom with ease.

Versatile Design

The cooling capacity makes it suitable for spaces from 300 to 350 sq. ft., so you can rely on it for the living room. Some of its characteristics include:

  • Speeds – There are 3 settings to choose between so that you can run it during the day or night without being distracted by the noise it makes
  • Timer – The 24-hour timer of the system lets you program its operation as you see fit to reduce on running costs
  • Automatic shut-off – When the timer runs out, it automatically turns off
Multiple Modes
  • Dry Mode – This setting will cool down the air and remove excess moistness
  • Auto Mode – The Follow Me technology of the remote control allows it to adjust speeds according to environmental conditions automatically so that it upkeeps the perfect temperature without requiring you to interfere
  • Energy Saver Mode – When the condenser stops cooling the air, the fan stops operating as well, after a few minutes turning on automatically to check the temperature and see if settings are OK or adjustments to the environment need to be made
  • Sleep Mode – It adjusts the temperature automatically as you sleep to ensure a comfortable environment without producing too much noise

It uses a washable filter that removes contaminants from the air that is pulled into the system so that you don’t only benefit from a cool, pleasant living environment, but breathe in cleaner air as well. The filter requires routine cleaning, when dirt accumulates to be specific, but you don’t have to employ guesswork to figure out when you must clean it as the indicator light will let you know. Moreover, you are provided easy filter access for straightforward maintenance.


9. Koldfront CAC8000W – Most Versatile

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Specifications:


  • Cooling capacity: 8,000 BTUs
  • Room coverage: 350 square feet
  • Fan speeds: 3
  • Operating modes: AC, fan-only, dry
  • Air direction control: 4-way
  • Energy efficiency ratio: 11.0

  • Moisture removal: 2.1 pints per day
  • Noise level: 51 dB
  • Included installation kit:
  • Dimensions: 14.5” x 20.8” x 23.5”
  • Weight: 75 pounds
  • Warranty: 2 years





The 8,000 BTU cooling power of the system makes it suited for spaces of up to 350 sq. ft., which means that you can install it in a larger room without worrying it won’t handle the amount of air it needs to cool down. An aspect that you must bear in mind with the purchase, though, is that it is only suited for casement windows that are left to right.

Efficient and Innovative
  • Speeds – The 3 settings allow you to run it day and night
  • Dehumidifier – It removes excess moisture quite fast and uses an auto-drain mechanism to dispose of the collected water so that you won’t have to tend to this task
  • Automatic – In the event of a blackout, it will automatically turn back on with the memorized functions so you don’t have to input them again
Easy Maintenance and Operation
  • Digital Display – It provides all the relevant information you seek regarding its operating modes, settings, and more
  • Remote Control – It has an operating range of up to 16’, which means that you can adjust the settings regardless of where you stand in the room
  • Timer – The 24-hour adjustable span lets you decide the exact operating time length of the system, when the time you set is reached turning off on its own
Affordable For All

The 11.0 EER ensures this is a cost-efficient system that won’t run a hole through your wallet, even if you run it day and night. Moreover, it includes the installation hardware in the package so that you won’t have to make any additional purchases.

8-way Air Direction

For even air distribution, you can control it to flow in 8 different directions. Hence, you will have it wherever you need it the most. Its particularities are:

  • Speeds – Choose between the 3 integrated speeds/li>
  • Timer – The unit can be set up to 24-hrs in advance
  • Safe – The unit is UL and CUL certified

In comparison, with the other models in its price range, it has been designed with an air ionizer. This feature will remove contaminants from the air such as pollen, dust, pet dander, and bacteria. If you suffer from allergies, this will be your helping hand.


8. Frigidaire FFRS0822S1 – Most User-Friendly

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Specifications:


  • Cooling capacity: 8,000 BTUs
  • Room coverage: 350 square feet
  • Fan speeds: 4
  • Operating modes: Cool, fan-only, Energy Star
  • Air direction control: 4-way
  • Energy efficiency ratio: 10.9

  • Moisture removal: 3 pints per hour
  • Noise level: 48.4 dB
  • Included installation kit:
  • Dimensions: 14.2″ x 23.5″ x 20.2″
  • Weight: 79 pounds
  • Warranty: year full, 5 years for the sealed system





It works for spaces of up to 350 sq. ft. and is specially tailored for casement or sliding window installation. It employs 8,000 BTUs and it effortlessly maintains the home cool and comfortable without adding to the electricity bills too much.

Highly Practical

It features numerous convenient features to fit your needs. The included remote control lets you select your settings with ease from afar. Other highlights include:

  • Timer – Programmable up to 24 hours, it lets you set it to run whenever you find the most suitable time for your needs
  • Auto-Cool – When temperatures exceed normal levels, the AC will automatically change to a higher speed
  • Air Direction – In order to ensure a cool air all over the room, it features numerous air directions so every room corner is covered
  • Filter Indicator – Lets you know when the maintenance chore is due
Powerful

It’s powerful, yet quite cost-efficient. It has a dehumidification capacity of 3.0 pints an hour so that it lowers excess moisture with ease and ensure mold won’t harbor in the room. Some of its characteristics are:

  • Multi-Speed – Cools within minutes if you set it on the higher operating speeds
  • Multi-Modes – Choose between fan only, energy star, and cool
  • Mesh Filter – Reduces contaminants and odors from the air

7. Global Industrial Air Conditioner – Best for Air Circulation

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Specifications:


  • Cooling capacity: 10,000 BTUs
  • Room coverage: 450 square feet
  • Fan speeds: 2
  • Operating modes: Cool, dry, fan-only
  • Air direction control: 4-way
  • Energy efficiency ratio: 10.4

  • Moisture removal: 2.5 pints per hour
  • Noise level: 59 dB
  • Included installation kit:
  • Dimensions: 20-7/8” x 14-5/8” x 23-1/2″
  • Weight: 85 pounds
  • Warranty: 5 years





It is rated at 10,000 BTUs so it will easily cool down an area of 450 sq. ft. If you’re on a budget, consider it as it can cover a large space while consuming minimal energy. Furthermore, it can remove excess moisture, more precisely 2.5 pints/hour.

4-way Air Direction

Lets you decide air distribution direction so that full coverage of the room is granted. It includes interesting features like:

  • Auto-restart Mode – It picks up from where it left off after a blackout
  • Sleep Mode – Suited for use when you hit the sack as it adjusts operational speed levels to ensure you won’t be bothered by the system
  • Timer – Lets you set its operational time span in advance to reduce running costs (can be set for up to 24 hours)
Numerous Accessories Included

To prevent further investment, it comes with numerous accessories that you can take advantage of. Inside of the package, you will find the “Follow Me” remote control so you can change the settings from afar. Other convenience features include:

  • Installation Kit – Install this AC without the help of a professional as the kit and manual are included
  • LED Display – See the settings it’s operating on even in low light conditions

At no extra price, you will receive 5-years of free coverage. In case the quality of it no longer meets your standards, the company will either cover the repair costs or replace it with a new unit.


6. Frigidaire FFRA1022R1 – Best for the Money

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Specifications:


  • Cooling capacity: 10,000 BTUs
  • Room coverage: 450 square feet
  • Fan speeds: 3
  • Operating modes: Cool, dry, fan-only
  • Air direction control: 8-way
  • Energy efficiency ratio: 10.9

  • Moisture removal: 2.7 pints per hour
  • Noise level: 55 dB
  • Included installation kit:
  • Dimensions: 21.5″ x 19″ x 14.5″
  • Weight: 69 pounds
  • Warranty: 1 year full, 5 years for the sealed system





Even though it’s compact, the 10,000 BTUs capacity makes it a fierce option for battling torrid summer days. Moreover, it makes it suited for spaces of up to 450 sq. ft., ensuring the right temperature is reached in a matter of minutes. The EER is of 10.9 to let you run it non-stop without stressing over costs.

Multiple Operating Modes

It features customizable controls. Hence, you can effortlessly make it work according to your needs. Its features are:

  • Dehumidifier – It can remove up to 2.7 pints of moisture per hour
  • Speeds – Choose between the 3 cool and 3 fan speeds
  • Airflow – Position the louvers in 8 different ways to direct the air however way you want it

Use the remote control to adjust the settings regardless of your position in the room. The remote features cool, energy-saver mode, fan only, timer buttons, auto fan, and sleep.

Features To Consider
  • Maximum Window Height – 15-1/2”
  • Window Width – 23” – 36”
  • Capacity – (High): 285 CFM (Med): 243 CFM (Low): 221 CFM
Safe and Certified

It has been independently tested and proven to be efficient, as well as safe to run. The certificates it comes with include CUL SA11087, ADA Compliant, UL Listed.


5. GE AEM10AX – Most Feature-Rich

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Specifications:


  • Cooling capacity: 10,000 BTUs
  • Room coverage: 400 square feet
  • Fan speeds: 3
  • Operating modes: Cool, dry, fan-only
  • Air direction control: 4-way
  • Energy efficiency ratio: 12.2

  • Moisture removal: 2.8 pints per hour
  • Noise level: 52 dB
  • Included installation kit:
  • Dimensions: 15-3/4″ x 21-11/32” x 21-1/4”
  • Weight: 64 pounds
  • Warranty: 1 year





The 10,000 BTUs capacity system cools within minutes a space up to 400 sq. ft. This is an Energy Star qualified model with a rating of 12.1 CEER. Therefore, it will quickly and efficiently provide cool air without considerably impacting your electricity bill. To limit further investment, the window installation kit is also included.

Electronic Digital Thermostat

You get full control over the conditions of the room with this feature. The thermostat will ensure that it will keep optimal comfort levels continuosly according to your needs. Some of its features include:

  • Timer – Program the AC up to 24-hours in advance
  • Speeds – Choose between the 3 integrated speeds to find your perfect comfort level
  • Modes – Set it to work either on Eco, Sleep, or Fan mode
  • Louvers – The AC has been designed with 4-way air direction
Features To Remember
  • Suitability – Maximum window height 18-1/6”, window width between 24” to 36”
  • Noise – It will produce a noise level of 52 decibels
Dehumidification Mode

The AC will remove the excessive moisture from the air so you will always feel comfortable. The 2.8 pts./hr. capacity will eliminate the possibility for mold spores to form or to spread. One of the main features about this model is the fact that it has been independently tested. Thus, it has been awarded with UL, CUL, and AHAM certifications, and it is even California Prop 65 approved.

Furthermore, this is another model that comes with generous warranty periods. For both labor and parts, you will receive a 1-year limited warranty. Hence, if it no longer works according to your standards, you can send it back.


4. PerfectAire 3PASC10000 – Editor’s Choice

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Specifications:


  • Cooling capacity: 10,000 BTUs
  • Room coverage: 450 square feet
  • Fan speeds: 3
  • Operating modes: Cool, fan-only, dry, automatic
  • Air direction control: 4-way
  • Energy efficiency ratio: 10.4

  • Moisture removal: N/A
  • Noise level: 61 dB
  • Included installation kit:
  • Dimensions: 23.5″ x 14.5″ x 20.5″
  • Weight: 72 pounds
  • Warranty: 1 year





The multiple fan speeds let you use it in different conditions. The electronic controls are user-friendly to suit use even by those who are uninitiated. The filter is slide-out, easy-to-remove, front-mounted, and easy-to-clean to ensure hassle-free maintenance.

Adaptable and Powerful

It it has a 24-hour timer with on/off, and a sleep mode. The auto restart helps it repower with the pre-selected settings. Some of its characteristics are:

  • Air Capacity – The 10,000 BTUs ensure quick cooling (within an estimated 10-15 minutes)
  • Low Operational Noise – It produces approximately 61 decibels
  • Fully Programmable – Set it to function according to your needs
Features Worthy To Mention
  • The digital display is easy to read even by those who aren’t tech savvy
  • The filters are washable, which reduces upkeep costs considerably
  • The exhaust control circulates the air to prevent staleness
  • Save money as it has an energy-saver mode
User-friendly and Versatile

As it has up to 10,000 BTU’s, you can basically use it to cool any indoor space that comes to mind. Some of its modes include:

  • Cool ModeMostly used for spot cooling during torrid summer days
  • Fan ModeProvides a continuous circulation of fresh air to reduce air dampness
  • Dry ModePerfect for spaces with excess moistness issues
  • Auto ModeAutomatically adjusts its operation to suit the temperature setting you select

3. Frigidaire FFRS1022R1 – Best for Large Spaces

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Specifications:


  • Cooling capacity: 10,000 BTUs
  • Room coverage: 450 square feet
  • Fan speeds: 3
  • Operating modes: Cool, fan-only, Energy Saver
  • Air direction control: 4-way
  • Energy efficiency ratio: 10.4

  • Moisture removal: 3.4 pints per hour
  • Noise level: N/A
  • Included installation kit:
  • Dimensions: 14.5″ x 20.2″ x 23.5″
  • Weight: 84 pounds
  • Warranty: 1 year full, 5 years for the sealed system





It is rated at 10,000 BTUs, being suited for spaces up to 450 sq. ft. It also has a dehumidification capability of up to 3.4 pints per hour. The multi-speed electronic control let you customize it according to your preference. Designed with multiple modes, speeds, and useful features, this model is a must-have for living spaces or offices.

Fully Controllable Operation

You can make it run according to your preferences as it has numerous settings that you can choose from. This includes:

  • Timer – Can be set for up to 24 hours
  • Air Flow – The 4-way air direction means that each corner of the room will be provided with cold air to remove the possibility of hot spots
  • Speeds 3 levels are put at your disposal to select from
  • Thermostat – The programmable thermostat (selectable range from 60 to 90 degrees Fahrenheit) will allow you to choose the desired room temperature
Multiple Modes Design
  • Cool Mode – Uses the whole power of the AC to cool down large spaces within 10 minutes
  • Fan Mode – Provides air circulation without cooling
  • Energy Saver Mode – Adjust settings according to the conditions in the room automatically
Simple Installation

Due to the included window installation kit, you will be able to set it up with ease. It is suitable for casement windows that measure between 15.5-inch to 16.2-inch in width with a height measuring between 21.5-inch to 40-inch.


2. Friedrich Chill CP10G10B – Best for Moisture Removal

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Specifications:


  • Cooling capacity: 10,000 BTUs
  • Room coverage: 450 square feet
  • Fan speeds: 3
  • Operating modes: AC, dehumidifier, fan-only
  • Air direction control: 4-way
  • Energy efficiency ratio: 11.3

  • Moisture removal: 3 pints per hour
  • Noise level: 50 dB
  • Included installation kit:
  • Dimensions: 22.2″ x 23.6″ x 15″
  • Weight: 81 pounds
  • Warranty: 1 year full, 5 years for the sealed system





Even though it uses minimal energy, it has a capacity of 10,000 BTUs. Therefore, it can cover up to 450 sq. ft. with ease. In fact, it is Energy Star rated, which means that its operation minimizes environmental impact, doesn’t put strain on your wallet, all without sacrificing performance. As it has a high capacity, it is often used for home and light commercial needs.

Antimicrobial Air Filter

It will not only produce cool air, but it will clean it of airborne particles as well. The filter is washable and reusable to cut down on upkeep costs as much as possible. Some of its design features include:

  • Air Flow – The louvers automatically oscillate from left and right during cooling to eliminate the possibility of hot spots
  • Auto Restart – In case you’ve experienced a power shortage, it will automatically restart on the previous settings, when the power comes back on
  • Timer – The 24-hr programmable timer lets you control the time span of its operation
Mention-Worthy Features
  • Suitability – For vertical windows that measure a minimum width of 25.25” to a maximum width of 39”
  • Accessories – The remote control and the installation kit are included at no extra price
  • Safe – The AC doesn’t produce Ozone which makes it safe for extensive use
  • Moisture Removal – It will remove 3 pints per hour of excess moisture
  • CFM – Flaunts rating of 300 cubic feet per minute
  • Side Curtains – The curtains ensure a tight fit to reduce exterior noise and light

EntryGard protection means that you can install it without worrying about your safety. Furthermore, even if you have an awkward-shape window, you will be able to fix it with ease as it has a 6 ft power cord.


1. Amana AMAP151BW – Best Overall

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Specifications:


  • Cooling capacity: 15,000 BTUs
  • Room coverage: 700 square feet
  • Fan speeds: 3
  • Operating modes: Cool, dry, fan-only
  • Air direction control: 8-way
  • Energy efficiency ratio: 11.9

  • Moisture removal: 3.52 pints per hour
  • Noise level: 56 dB
  • Included installation kit:
  • Dimensions: 25.4” x 23.6” x 17.9”
  • Weight: 105.8 pounds
  • Warranty: 1 year





It employs 15,000 BTUs to cover up to 700 sq. ft. The on-board electrical panel and the digital display will allow you to set the settings with ease even if you’ve never had such a product before.

Multiple Operating Modes

The flexible comfort features will allow you to set the AC to work according to your own specific needs. Choose between Eco mode and Sleep mode for quiet and energy-efficient operation. Its design features are:

  • Timer – Program it up to 24-hrs in advance to make it cool on your schedule
  • Filter – The removable and washable filter will protect you from contaminants such as pollution, bacteria, and fungus growth
  • Auto Restart – It begins its operation on the previous settings in case of a blackout
Features To Consider
  • Dimensions – 25.4” x 23.6” x 17.9”
  • Capacity – 371 CFM
  • Window Width – Minimum: 19” – Maximum: 36”
8-way Directional Air Louvers

The AC will blow the air right where you need it. Adjust the louvers according to your needs to get the cooling that you need. In addition to this, the 4.9-ft. power cord will allow you to install it with ease. Some of its highlights include:

  • Safe – Trust it to work even when you’re not at home as it’s U.L listed
  • Speeds – Choose between the 3 integrated speeds or set it on Auto mode
  • Sleep Mode – Gradually increases the temperature after it has been activated

Evidently, everything you need for the installation process is included with the purchase, so expect no extra costs down the road but rather constant enjoyment of your new AC that keeps you cool during the hottest time of the year.


Top 14 Comparison

Photo Casement Window Air Conditioners Price
Amana AMAP151BW Image
Best Overall
1. Amana AMAP151BW
  • Maximum coverage area: 700 sq. ft.
  • Cooling power: 15,000 BTUs
  • Fan speeds: 3
  • Air direction control: 8-way
  • Features: 24-hour timer, Automatic restart, Washable filter, Sleep mode, Eco mode, Electronic controls
  • Dimensions: 25.4” x 23.6” x 17.9”
  • Warranty: 1 year
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Friedrich Chill CP10G10B Image
Best for Moisture Removal
2. Friedrich Chill CP10G10B
  • Maximum coverage area: 450 sq. ft.
  • Cooling power: 10,000 BTUs
  • Fan speeds: 3
  • Air direction control: 4-way
  • Features: 24-hour timer, Automatic restart, Automatic air sweep
  • Dimensions: 22.2″ x 23.6″ x 15″
  • Warranty: 1 year full, 5 years for the sealed system
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Frigidaire FFRS1022R1 Image
Best for Large Apartments
3. Frigidaire FFRS1022R1
  • Maximum coverage area: 450 sq. ft.
  • Cooling power: 10,000 BTUs
  • Fan speeds: 3
  • Air direction control: 4-way
  • Features: 24-hour timer, Programmable thermostat
  • Dimensions: 14.5” x 20.2” x 23.5”
  • Warranty: 1 year full, 5 years for the sealed system
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PerfectAire 3PASC10000 Image
Editor’s Choice
4. PerfectAire 3PASC10000
  • Maximum coverage area: 450 sq. ft.
  • Cooling power: 10,000 BTUs
  • Fan speeds: 3
  • Air direction control: 4-way
  • Features: Fully programmable, Automatic cooling mode, Digital display, Exhaust control, Energy saver mode
  • Dimensions: 23.5″ x 14.5″ x 20.5″
  • Warranty: 1 year
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GE AEM10AX Image
Most Feature-Rich
5. GE AEM10AX
  • Maximum coverage area: 400 sq. ft.
  • Cooling power: 10,000 BTUs
  • Fan speeds: 3
  • Air direction control: 4-way
  • Features: Sleep mode, Eco mode, 24-hour timer
  • Dimensions: 15-3/4″ x 21-11/32” x 21-1/4”
  • Warranty: 1 year
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Frigidaire FFRA1022R1 Image
Best for the Money
6. Frigidaire FFRA1022R1
  • Maximum coverage area: 450 sq. ft.
  • Cooling power: 10,000 BTUs
  • Fan speeds: 3
  • Air direction control: 8-way
  • Features: Check filter alert, Washable filter, Electronic controls, On/off timer, Energy saver mode, Automatic cool, Exhaust controls
  • Dimensions: 21.5″ x 19″ x 14.5″
  • Warranty: 1 year full, 5 years for the sealed system
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Global Industrial Air Conditioner Image
Best for Air Circulation
7. Global Industrial Air Conditioner
  • Maximum coverage area: 450 sq. ft.
  • Cooling power: 10,000 BTUs
  • Fan speeds: 2
  • Air direction control: 4-way
  • Features: LED display, Sleep mode, Automatic restart, 24-hour timer
  • Dimensions: 20-7/8” x 14-5/8” x 23-1/2″
  • Warranty: 5 years
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Frigidaire FFRS0822S1 Image
Most User-Friendly
8. Frigidaire FFRS0822S1
  • Maximum coverage area: 350 sq. ft.
  • Cooling power: 8,000 BTUs
  • Fan speeds: 4
  • Air direction control: 4-way
  • Features: 24-hour timer, Automatic cool, Filter change indicator
  • Dimensions: 14.2″ x 23.5″ x 20.2″
  • Warranty: 1 year full, 5 years for the sealed system
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Koldfront CAC8000W Image
Most Versatile
9. Koldfront CAC8000W
  • Maximum coverage area: 350 sq. ft.
  • Cooling power: 8,000 BTUs
  • Fan speeds: 3
  • Air direction control: 4-way
  • Features: Automatic restart, Digital display, 24-hour timer
  • Dimensions: 14.5″ x 20.8″ x 23.5″
  • Warranty: 2 years
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Arctic King AKSC08CR61 Image
Most Silent
10. Arctic King AKSC08CR61
  • Maximum coverage area: 350 sq. ft.
  • Cooling power: 8,000 BTUs
  • Fan speeds: 3
  • Air direction control: 4-way
  • Features: Electronic controls, Automatic restart, Slinger-up system, Washable filter, 24-hour timer, Sleep mode, Energy Saver mode
  • Dimensions: 15″ x 21″ x 24″
  • Warranty: 1 year
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Frigidaire FFRE0633S1 Image
Most Energy Efficient
11. Frigidaire FFRE0633S1
  • Maximum coverage area: 250 sq. ft.
  • Cooling power: 6,000 BTUs
  • Fan speeds: 3
  • Air direction control: 8-way
  • Features: Filter change indicator light, Sleep mode, 24-hour timer, Ionizer, Ready-select controls
  • Dimensions: 15.5” x 13.4” x 18.5”
  • Warranty: 1 year full, 5 years for the sealed system
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Keystone KSTAW06B Image
Budget Pick
12. Keystone KSTAW06B
  • Maximum coverage area: 250 sq. ft.
  • Cooling power: 6,000 BTUs
  • Fan speeds: 3
  • Air direction control: 2-way
  • Features: Automatic restart, Sleep mode, 24-hour timer, Mesh filter, Filter change indicator light
  • Dimensions: 15.7” x 18.5” x 13.4”
  • Warranty: 2 years
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Keystone 5,000 BTU Image
Best for Small Apartments
13. Keystone 5,000 BTU
  • Maximum coverage area: 150 sq. ft.
  • Cooling power: 5,000 BTUs
  • Fan speeds: 3
  • Air direction control: 2-way
  • Features: Automatic restart, Temperature sensing remote control, Antibacterial filter, 24-hour timer, LED display, Electronic controls
  • Dimensions: 12.5″ x 16.25″ x 39″
  • Warranty: 1 year full, 5 years for the sealed system
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Emerson Quiet Kool EARC5MD1 Image
Best for Office
14. Emerson Quiet Kool EARC5MD1
  • Maximum coverage area: 150 sq. ft.
  • Cooling power: 5,000 BTUs
  • Fan speeds: 2
  • Air direction control: 8-way
  • Features: Automatic restart, Rotary controls
  • Dimensions: 14.6” x 21.5 x 19.7”
  • Warranty: 1 year full, 5 years for the sealed system
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How To Install an AC in a Casement Window


To follow through properly, you require a number of tools at hand, including Plexiglas, Styrofoam, or any other material that keeps the coolness inside and the hot air out, as well as a bungee cord and a latch.

Step 1: Measure and Check

Get the cutting and drilling parts done prior to acquiring the Pixelglas. Put the AC system close to the installation site to ensure you won’t be in need of extending the vent hose later.

  • Establish how large the insert needs to be.
  • Check that the Plexiglas and vent hose match in size.
  • If the aforementioned do not match in size, a proper fit is not possible, so you must cut a right-sized hole that suits the AC vent hose measurement.
Step 2: Install The Insert
  • Open the window and use a latch to hold it in place during the whole procedure so that it won’t get damaged.
  • Secure the window to prevent any damage that could be inflicted by a breeze or light wind.
  • With the help of twist clamps, you can proceed to secure the insert to the frame.
Step 3: Weatherproof the Insert

You have to remember that the insert is the sole part that separates your home from the outdoors, and this is why it’s important to seal it right so that it is waterproof. Caulk the jointing of the window frame to the casing. In case you use self-adhesive, you must proceed as follows:

  • Attach it prior to securing the insert to the frame.
  • The weather stripping should fit tightly between the frame and insert so it forms an effective seal, and it must compress as well.
  • Make sure that it’s about half of its normal thickness where two meet.

To make sure the window is as waterproof as possible, you can fit the stripping between the wall and insert and run it over the area where they meet.


How To Insulate Around Window AC


It’s important to remember that an air conditioner will not operate properly if there are air leaks. In addition to this, your unit will have to operate harder than before and your energy bill may increase due to the high power consumption. Also, during the cold seasons, it’s preferential to keep the cold air outside of your home.

To learn how to properly insulate, take a look at the steps below:

Installation – Prevention is much better than fixing. Thus, the best way to ensure that there are no air leaks is to use the right amount of sealant. Before doing this, you have to measure the area correctly so the unit fits snug in the opening.

Check for air leaks – As you may know the window has to be lowered on top of the AC to seal it. Nonetheless, if not done properly, there will be some space left between the AC and the window. You can check for air leaks by holding a light above the AC and under the window. If there’s even a slight flickering, there’s a leak.

Examine the chassis – In case the flap looks yellow or worn out, it may mean that it allows air leaks. The fine cracks on the surface are allowing air to escape. If you wish, you can pick up a replacement or get in contact with the manufacturer.

Spray Foam – If you don’t have the option to purchase replacement parts, you can spray foam where the light indicates that there are air leaks. Remember, this is not a permanent solution and it may not work during the cold seasons.


Conclusion

All of the models mentioned will ensure a fast cool, without consuming too much energy. Therefore, you can allow it to work throughout the day and night. In addition to this, the majority of the units are more than just an AC. Thus, you can get the most for your money.

Best casement window air conditioner on the market: Amana AMAP151BW

With a cooling capacity of 15,000 BTUs, it can be relied on for use in spaces of up to 700 square feet, aside from the qualitative temperature regulation performance providing moisture relief capabilities as well as it withdraws up to 3.52 pints per hour. It’s hard to top even when it comes to efficiency seeing how it is rated at 11.9 EER, which means that running costs are kept to a minimum. With 3 speed levels provided and low operational noise produced, it’s easy to see why this AC system reigns when it comes to cooling needs of large spaces.

Editor’s choice: PerfectAire 3PASC10000

An entry we recommend to all those in need of an AC that can tailor to spaces upward to 450 square feet, this PerfectAire model is a force to be reckoned with considering its high 10,000 BTU cooling power. However, this isn’t the only aspect of interest seeing how it flaunts a long list of highlights that include a 24-hour programmable timer that grants you the ability to customize its operation as you see fit, automatic restart upon system reboot with the previously selected settings, and multiple operating modes, only to name a few.

Best casement window air conditioner for small apartments: Keystone 5,000 BTU

The small-capacity system is just perfect for small condos as it provides upward to 5,000 BTUs, which means that it cools spaces of up to 150 square feet in a matter of minutes. What we especially like is that aside from its cooling capabilities, it can dehumidify the space as well, wicking approximately 1.3 pints of moisture per hour from the air it pulls in to ensure you won’t have mold-related issues. Furthermore, it’s as quiet as they get, producing a mere 49 dB to make it even possible to sleep in the same room with it when it runs.

Most energy efficient casement window air conditioner: Frigidaire FFRE0633S1

This is an important aspect to keep in mind when you acquire an AC as you wouldn’t want to waste your money on a system that not only likely costs a lot upfront, but that spikes the electricity bills, drilling a hole in your wallet. If you are budget-smart and seek a cost-efficient system, this Frigidaire is your best option as it is rated 12.2 for energy efficiency.

Best casement window air conditioner for the money: Frigidaire FFRA1022R1

The value deal of the moment, this Frigidaire entry manages to stay on the affordable side despite the fact that it employs upward to 10,000 BTUs so that it can keep even a space as large as 450 square feet cool on the most torrid day of summer. Aside from this performance efficiency, note that it is covered for 1 year in full, both parts and labor, while the sealed system it features is backed against defects for a total of 5 years. Moreover, quality and durability are basically a given seeing how it is manufactured by what most deem as the leading brand on the market.

Tobey Hunter
Tobey Hunter
Tobey is the editor-in-chief at Optima Institute, his prior experience as a niche product reviewer in air quality improvement systems helping shape his path to conduct thorough research toward selecting and analyzing products so that customers are satisfied with the provided recommendations. During his carrier, Tobey also gathered technical input that makes him well versed in understanding advancements in modern systems, helping readers in turn to better understand how modern devices help improve life quality.