Best Air Conditioner For Casement Windows | Beat the Heat

The use of air conditioners for sliding/casement windows is increasing of late. Among the many models I checked out, the FRIGIDAIRE FFRS1022R1 is my top pick. However, the KOLDFRONT CAC8000W and PERFECT AIRE 3PASC10000 are also great options.

Looking for a window AC for your sliding or casement window? With so many options available, it can be overwhelming to decide where to begin.

But choosing the wrong casement window AC unit can lead to inefficient cooling, wasted energy, and unnecessary expense. Luckily, we’ve done the research for you and compiled a list of best portable air conditioners. Keep reading to find the perfect AC unit to keep your home cool and comfortable.

Best Air Conditioner For Casement Windows

1. FRIGIDAIRE FFRS1022R1 : Perfect Cooling Solution For Small Spaces

FRIGIDAIRE FFRS1022R1 10000 BTU 115-volt Slider/Casement...

• Specially designed for casement-window or sliding-window...
• 10,000 BTU air conditioner cools a room up to 450 sq. ft....

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The Frigidaire FFRS1022R1 is the perfect solution for those who have casement windows in their homes. With 10,000 BTUs of cooling power, it can quickly cool a room of up to 450 square feet. Plus, it comes with a dehumidifying function that removes up to 3.4 pints of moisture from the air per hour.

Installation is a breeze, as this window AC unit is designed specifically for casement or slider windows. The included installation kit has everything you need to get it up and running in no time.

And once it’s installed, the electronic controls and full-function remote make it easy to set your desired temperature and fan speed. The unit also features auto cool, energy saver mode, quiet mode, 4-way air direction control, and a washable mesh filter with a check filter alert.

Overall, the Frigidaire FFRS1022R1 is an excellent choice for anyone needing reliable and efficient cooling. It may not have Energy Star certification, but its powerful performance and easy installation more than make up for it.

2. KOLDFRONT : Best For Vertical Sliding Windows

Koldfront CAC8000W 8000 BTU 115V Casement Air Conditioner...

• 8000 BTU vertical window air conditioner engineered for...
• Designed to fit casement (left to right sliding) windows...

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The Koldfront CAC8000W is an 8000 BTU sliding window air conditioner designed for vertical windows. With its specialized design and energy-saving features, this sliding window AC is the perfect choice for rooms ranging from 300 to 350 square feet. 

One thing that makes this casement window AC unit stand out is its dehumidifier feature, which helps to get rid of excess moisture in your space. Plus, if you’re trying to save on energy costs, this AC has got you covered with functions like sleep mode, energy saver mode, check filter alert, thermostat-controlled operation, and more.

But wait, there’s more! This portable air conditioner also has a digital display, multiple fan speeds, and a remote control that works up to 16 feet away. And the best part? It’s super easy to install, so you’ll be enjoying cool, dry air in no time!

Just a heads up – this is a vertical window air conditioner designed specifically for vertical windows. So if you have a horizontal sliding window kit, this might not be the best casement window air conditioner option for you.

3. PERFECT AIRE : Best For Cooling Rooms Sized Up To 450 sq. ft.

PerfectAire 10,000 BTU Slider Air Conditioner Window A/C -...

• 10, 000 BTU cooling capacity
• Electronic controls (remote control included); auto restart...

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Looking for a casement air conditioner that can efficiently cool your space without making noise? The PerfectAire 10,000 BTU Slider Air Conditioner might be the perfect fit for you!

Best for rooms sized up to 450 square feet, this sliding window AC comes with a full range air direction control that ensures that the air reaches and cools every corner of the room. 

It is loaded with features that make it a convenient option for any user. The slide-out filter access makes it easy to clean and maintain. With just a simple slide, users can easily remove and clean the filter, ensuring that it operates at optimal performance. 

Moreover, this casement window AC unit comes with electronic controls. This feature enables users to adjust the temperature, fan speed, and mode from anywhere in the room, providing an added level of convenience and ease of use. While it might be a bit pricey, the energy-saving features and easy-to-use controls make it a worthwhile investment.

4. FRIGIDAIRE FFRE063WAE : Best Multi-speed Fan and Programmable Timer

Frigidaire FFRE063WAE Window Air Conditioner, 6,000 BTU,...

• Multi-Speed Fan: Features three different fan speeds, for...
• Programmable 24-Hour On/Off Timer: Customize times to fit...

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The Frigidaire Window-Mounted Room Casement Air Conditioner is an excellent option for anyone looking to cool down a small to medium-sized room. Its 6,000 BTUs of cooling power can quickly and effectively cool down the space. This casement window AC unit also boasts a multi-speed fan with three fan speeds, providing additional cooling flexibility.

It maintains the preset room temperature, ensuring that you are always comfortable. Additionally, this casement window AC unit has a Sleep Mode that gradually increases the temperature by a few degrees over the course of the evening, providing maximum comfort while also saving energy.

This sliding window AC is designed with an adjustable space-wise design that has optional side panels, which extend to best fit your window. It even has an easy-to-clean washable filter that captures dust from the air and ensures the dehumidifier operates efficiently.

What’s more, this sliding window AC is ENERGY STAR Certified, which means that it consumes less energy than typical air conditioners, reducing energy usage and lowering utility bills. Additionally, the unit comes with a remote control, enabling you to adjust the temperature and fan speed from a distance.

5. GE : Best For No-Hassle Installation 

GE Window Air Conditioner 5100 BTU, Efficient Cooling For...

• GE 5100 BTU MECHANICAL WINDOW AIR CONDITIONER - Designed to...
• BEST FOR SMALL ROOMS: This AC unit is the right size for...

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Introducing the GE Casement Window Air Conditioner 5000 BTU, a powerful cooling unit designed to cool smaller rooms up to 150 sq ft efficiently.

Equipped with a mechanical thermostat, this casement window AC unit provides two cooling modes and two fan speeds to offer flexible and optimal room temperature. The controls with ten temperature settings make it easy to adjust cooling to your comfort level. Plus, with the low-noise operation, you can keep the cool air flowing with minimal disruption, making it ideal for nighttime use in bedrooms.

Regular cleaning of the filter every 30 days helps ensure that your unit runs smoothly and efficiently. The fixed chassis design and included EZ Mount installation kit make it easy to install this unit in a double-hung window.

One thing to keep in mind is that this is a mechanical unit, meaning that it doesn’t come with digital controls. However, this also means it’s incredibly easy to use and set up.

6. LG : Best for Quiet Operation in Medium-Sized Rooms

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LG 8,000 BTU Mounted Window Air Conditioner, Cools 350...

• LOW NOISE PERFORMANCE: Operates at sound levels as low as...
• ENERGY STAR CERTIFIED: This air conditioner has met the high...

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LG Mounted 8,000 BTU Casement Window Air Conditioner is an excellent choice for those who want to cool their medium-sized rooms without spending a fortune on electricity bills. With its 8,000 BTU cooling power and a SEER rating of 13, this window AC is energy-efficient and can cool rooms up to 350 square feet. 

Its easy-to-use controls and full-function remote make it a convenient option, and its energy-saving capabilities make it an excellent long-term investment. With its low-noise performance, you can enjoy a calm and peaceful environment without any unnecessary noise.

One of the most notable features of this casement window AC unit is its energy-saving capabilities. This casement window air conditioner is Energy Star certified, which means it has met the high standards of the energy star program using energy-efficient technologies that translate into electricity savings.

7.  BLACK+DECKER : Best for the Ozone Layer 

12000 BTU Window Air Conditioner Unit AC BLACK+DECKER with...

• KEEPS ROOM COOL: This 12,000 BTU small window air...
• IDEAL FOR BEDROOM & OTHER SMALL ROOMS: Our 12000 BTU AC unit...

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With its 12.1 SEER rating and Energy Star certification, this AC is designed to be both environmentally friendly and energy-efficient, helping you save on your electricity bill while also reducing your carbon footprint.

This casement window AC unit features a washable nylon filter that makes it easy to clean, while its compact size makes it ideal for use in bedrooms, home offices, and other small rooms. And the LED display panel with 24-hour timer programming is also very convenient.

The energy efficiency of this portable air conditioner is superb, thanks to the use of R32 refrigerant, which has zero impact on the ozone layer and improves energy efficiency by up to 10% compared with R-410A.

Another feature I appreciate is the air conditioner’s ability to function as a dehumidifier. This is especially useful during the summer months when the air can feel muggy and damp. The removable, washable nylon filter also makes cleaning a breeze.

8. KEYSTONE : Affordable with Flexible Energy Star Options

Keystone 6,000 BTU Energy Star Window Mounted Air...

• Quick to Cool: The 6,000 BTU air conditioner for...
• Functionality: Cools a room up to 250 sq. ft. with...

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If you’re looking for an affordable and efficient air conditioning unit to cool a small room, the Keystone 6,000 BTU Window-Mounted Air Conditioner is an excellent choice. This energy Star-rated air conditioner has a SEER of 12.2, which can help you save money on power bills.

This air conditioning unit has electronic controls with an LED display and a temperature-sensing remote control that lets you conveniently set and maintain the room temperature from anywhere in the room. It also features a thermostat that signals the AC to cool the space based on where you are, ensuring an even temperature throughout the room.

With the ability to cool a room up to 250 square feet and a dehumidification rate of up to 1.5 pints per hour, this casement air conditioner is perfect for small rooms like apartments, bedrooms, and living rooms. It also has money-saving features like energy saver mode, sleep mode, and a programmable 24-hour timer.

9. MIDEA : Best for Wide Reach Cooling

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Midea 12,000 BTU EasyCool Window Air Conditioner,...

• 3 IN 1 COMFORT - The Midea EasyCool Window Air Conditioner...
• ENERGY EFFICIENT - The EasyCool window air conditioner is...

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The Midea 12,000 BTU EasyCool Window Air Conditioner is a great option for cooling and dehumidifying spaces up to 550 sq. ft. It has three modes – cooling, fan, and dehumidifier, to keep your house or office comfortable. 

With its Energy Star certification, you can save money on energy bills throughout the year. This window air conditioner has a 12 SEER rating, making it energy-efficient and eco-friendly.

The intuitive LED display and remote control make it easy to set time, temperature, and mode from across the room. You can program your temperature preferences for up to 24 hours with the built-in EasyTimer feature, making it even more energy-efficient. What’s more, the washable filter protects your family and living space from dust and pet hairs.

Overall, the Midea 12,000 BTU EasyCool Window Air Conditioner is a great option for those looking for an energy-efficient and customizable cooling solution. It is effortless to use due to its simple installation process and easy maintenance.

Quick Comparison Of AC For Sliding/Casement Windows

Buying Guide

If you have casement windows or sliding windows in your home, finding window AC units that fit can be challenging. Luckily, there are several casement air conditioners on the market that are specifically designed for these types of window units. Here are some factors to consider when choosing a portable unit for your sliding windows:

1. Cooling Power

Look for a casement air conditioner with enough cooling power to cool your space effectively. This tells you the amount of heat the AC can extract out of a room. It’s crucial to choose the right BTU unit for your room size. For small to medium-sized rooms (150-300 sq. ft.), a lower BTU unit will be sufficient, while higher BTU units can cool larger rooms more efficiently.
A good rule of thumb is to choose an air conditioner with a cooling capacity of at least 8000 British Thermal Units (BTUs) for spaces up to 350 square feet and at least 10,000 BTUs for spaces up to 450 square feet.
Airflow and humidity control are also important considerations for selecting an air conditioner, as they can impact the effectiveness of the unit.
Choosing a casement window AC unit that’s too small for your room can result in poor cooling performance, as the unit will have to work harder to cool the area. This leads to higher energy bills and potentially decreased lifespan of the unit.
On the other hand, choosing a casement window air conditioner that’s too large for your window frame can lead to unnecessary energy consumption and increased costs. So, it’s essential to choose the right size air conditioner for your space to ensure efficient and effective cooling.

2. Special Features

When it comes to special features, it’s essential to consider what will make your life easier and more comfortable. For example, a dehumidifier can be a useful addition to an air conditioner, especially if you live in a humid climate.
If you live in a humid climate, dehumidifying capacity is also an important consideration. This is the amount of moisture an AC can remove from the air. Higher dehumidifying capacity can improve indoor air quality and reduce the risk of mold and mildew growth. However, if you live in a drier climate, a lower dehumidifying capacity may be sufficient.
A programmable timer can be particularly helpful if you want to save energy by only running your air conditioner during certain times of the day or night. Some casement window air conditioners also come with washable or removable filters that can be easily removed and cleaned.
Consider additional features that can enhance your experience, such as remote control, programmable thermostat, air purifier, and quiet mode. These features may increase the unit’s price, but they can also improve comfort and convenience. Units without additional features may be more affordable, but they lack convenience and comfort.
Ultimately, the special features you choose will depend on your personal preferences and needs. Consider how you will use your portable air conditioner and choose a model with features that will make your experience more comfortable and convenient.

3. Energy Efficiency

Air conditioners can use a lot of energy, so it’s important to choose an energy-efficient model. The Seasonal Energy Efficiency Ratio (SEER) measures the ratio of cooling power to energy consumption. Higher SEER means lower energy consumption. Higher EER units are generally more energy-efficient but may come with a higher price tag. Lower EER units may be more affordable, but they may consume more energy.
Best casement window air conditioners are Energy Star certified and are designed to use up to 10% less energy than a standard window air conditioner. Efficient energy use is an important factor to consider when selecting an air conditioner brand for your sliding or casement window, as it can help to reduce energy bills and conserve resources.
In addition to energy certification, there are other ways to improve your AC’s energy efficiency. For example, keeping the filter clean and replacing it regularly can help your AC run more efficiently. You can also use a programmable thermostat to set your AC to turn on and off at specific times, which can help you save energy when you’re not home.

4. Noise Level

The noise level of a casement window air conditioner can be a significant factor, especially if you’re planning to use it in your bedroom or office. Look for air conditioners with noise levels of 60 dB or lower.
To put that into perspective, a typical conversation is around 60 dB, while a vacuum cleaner is around 70 dB.
Quieter units are generally more expensive but can provide a more comfortable living environment. On the other hand, noisier units may be more affordable but can disrupt your daily activities.
Some casement window air conditioners offer a “quiet mode” or “sleep mode” that can help reduce noise levels further, making them a better option for use in bedrooms or other quiet spaces.
Keep in mind that the noise level can also depend on the size and placement of your casement air conditioner. Slider and sash window dimensions should be measured to ensure a proper fit for your air conditioner.
Amazon provides a vast selection of heating, ventilation, and air conditioning products. When selecting an HVAC unit, consider the dimensions of your space in inches, as well as the necessary hoses, brackets, and hinges.
The compressor and manufacturing quality should also be evaluated for optimal performance. Proper wall measurements and information on materials, such as Poly(methyl methacrylate), can also be important.
By considering these factors, you can choose a window air conditioner that is specifically designed for your sliding windows and that meets your cooling needs and preferences.

Final Verdict

The Frigidaire FFRS1022R1 and KOLDFRONT are both excellent options. These models boast impressive cooling power and convenient features. Additionally, they are designed for easy installation, making them a popular choice for homeowners seeking an efficient solution.

For larger rooms, the Perfect Aire Slider Window Air Conditioner is a standout choice. It offers full-range air direction control, energy-saving features, and easy-to-use electronic controls. These features, combined with its impressive cooling capabilities, make it a compelling choice for those in need of a larger air conditioning unit.

Overall, all these air conditioners bring their own advantages, and the best casement window air conditioner choice ultimately depends on your specific needs and preferences.

With that said, the models outlined above have all earned a strong reputation for their performance and convenience and are worthy of consideration for anyone in the market for a new air conditioner.