Friedrich Kuhl KEL36A35A

The Friedrich Kuhl KEL36A35A is a powerhouse for cooling large spaces.

It's designed for spaces beyond 750 square feet, with a maximum coverage area of up to 2,700 square feet. I find this model ideal for extra large rooms or combined living and dining areas. 

With an impressive 35,000 BTUs, this unit delivers powerful cooling. I recently installed this one in a large workshop, and my clients report it can quickly lower temperatures in large spaces, even during peak summer heat. 

The unit is large and weighs a whopping 211 lbs., but this is necessary to house its powerful components. I didn't have any issues fitting it in larger window openings with the help of two assistants.

The Kuhl KEL36A35A operates at a noise level of 51 dB, which I believe is relatively quiet for a unit of its size, but it is certainly not the quietest window AC around. Despite its considerable cooling power, it won't disrupt your activities or conversations.

Overall, it's one of the best window air conditioners for large spaces, offering an abundance of cool air. Plus, this model offers supplemental heating during the cold season, as well. 

The Friedrich Kuhl KEL36A35A has a much higher cooling capacity than the LG Dual Inverter LW2422IVSM (another best window air conditioner on my list). Still, it's also noisier and less energy efficient.

If you want maximum coverage, the Kuhl is unmatched, but for energy savings and quieter operation, the LG might be preferable.

Frigidaire FHWC282WB2

The Frigidaire FHWC282WB2 is another exceptional choice for cooling extra-large spaces.

I recommend this unit for anyone looking to cool expansive rooms or open-concept spaces without breaking the bank. It's priced at around $875 and offers excellent performance value. 

It's designed to cover areas up to 1,900 square feet. With 28,000 BTUs, this Frigidaire model is a great choice for those who need to maintain a consistent, cool environment in big spaces without needing multiple units.

Operating on a 230-volt circuit, the Frigidaire FHWC282WB2 requires an appropriate outlet, which is typical for high-capacity air conditioners.

This is the first thing I check when my clients are interested in installing this unit, and you should also see if your space can support this requirement. 

The noise level is 59 dB, which is moderate for a unit of this capacity. While not the quietest, in my opinion, it’s manageable and won’t be overly disruptive in a large room.

Compared to the Frigidaire FFRE153WAE, the FHWC282WB2 provides significantly more cooling power (28,000 BTUs versus 15,100 BTUs).

It covers a larger area (1900 versus 850 square feet), which makes it a better choice for expansive spaces.

Related article: Understanding window AC power consumption and running costs

LG LW2516ER

The LG LW2516ER window AC unit has a cooling capacity of 24,500 BTUs, and it's suited for areas up to 1,560 square feet. For around $675, it offers a balance of performance and affordability. 

In my opinion, this window AC unit is an excellent choice if you’re looking to cool substantial areas such as large living rooms, family rooms, or even spacious offices. 

With a BTU rating of 24,500, this AC unit provides powerful cooling that can quickly bring down temperatures in sizable spaces. I believe it's one of the best window AC units for those needing a reliable cooling solution for larger rooms. 

I recently chose this model for a studio apartment in an old refurbished building, and found that it works well with the open space and high vaulted ceilings.

The LG LW2516ER operates at a maximum noise level of 61 dB. It has a good balance between powerful cooling and manageable sound levels. My clients report that it's not whisper-quiet but isn't too disruptive in a large room setting. 

The LG LW2516ER, with its 24,500 BTUs, offers slightly less cooling capacity than the LG Dual Inverter LW1822IVSM (18,000 BTUs) but is capable of covering a larger area (1,560 versus 1,000 square feet).

LG Dual Inverter LW2422IVSM

The LG Dual Inverter LW2422IVSM is a standout option if you want the best value for large spaces. It has a cooling capacity of 23,500 BTUs, and it’s ideal for areas up to 1,440 square feet.

It's a great choice if you are on a budget and aren't looking for expensive window air conditioners. It's priced at under $700 and gives you an excellent balance of efficiency, power, and cost.

I believe it's an excellent choice for anyone looking to cool large rooms or open spaces without breaking the bank.

The LW2422IVSM is designed with LG’s dual inverter technology. 

This means it provides powerful cooling but also operates with impressive energy efficiency, with an EER of 14.5. This is among the highest efficiency rating for a window AC. This means lower energy bills while maintaining a comfortable environment. 

One of the standout features of this air conditioner for me is its quiet operation, ranging from 44 to 59 dB. This is particularly beneficial for large spaces where noise can be a concern. 

Whether it's a living room, large bedroom, or office, the LG LW2422IVSM will cool effectively without causing disruptions. 

I also appreciate the fact that this is also a smart window AC. Once installed, the AC can be controlled via WiFi, which allows you to adjust settings from your smartphone. I believe this is particularly useful for managing the climate in large spaces where you might not always be near the unit.

The LW2422IVSM offers a higher cooling capacity (23,500 BTUs versus 14,000 BTUs). It covers a larger area (1,440 versus 800 square feet).

Both models feature quiet operation and WiFi control, but the LW1517IVSM is slightly quieter and more energy-efficient, making it ideal for smaller, quieter spaces.

LG Dual Inverter LW1822IVSM

I do like the LG products, and this is another dual inverter in a smaller size than the previous LG Dual Inverter LW2422IVSM.

The LG Dual Inverter LW1822IVSM is a top-notch choice for cooling spaces up to 1,000 square feet.

With an 18,000 BTU rating, this unit is designed to deliver efficient and powerful cooling while maintaining low energy consumption, thanks to its inverter technology.

It's one of the lower-priced window units on my list at $600, but it offers excellent value if you want superb climate control for medium to large rooms. 

The LW1822IVSM uses LG’s advanced dual inverter technology, which significantly improves energy efficiency and reduces noise levels.

With an EER rating of 14.7, this window unit ensures lower electricity bills compared to non-inverter air conditioners of similar capacity. I recommend this window AC to those who prioritize both effective cooling and cost savings. 

The LG Dual Inverter LW1822IVSM is designed for spaces up to 1,000 square feet. The 18,000 BTU capacity is ideal for large bedrooms, living rooms, or smaller open-concept areas.

The unit's cooling efficiency lets it quickly lower temperatures, so you'll have a comfortable environment even during the hottest days. 

I actually use this model myself in my bedroom with a vaulted ceiling.

One of the standout features of the LW1822IVSM is its WiFi connectivity, which lets you control the air conditioner remotely.

This is particularly convenient for managing the temperature in different parts of your home or office without needing to be physically present at the unit. I also enjoy not getting out of bed to adjust the settings!

In my opinion, the installation is straightforward. Its compact size and modern design make it a great fit for various window types, and I never had any issues with its setup and operation. 

When compared to the Frigidaire FHWC282WB2, the LG Dual Inverter LW1822IVSM offers less cooling capacity (18,000 BTUs versus 28,000 BTUs) but is significantly more energy efficient with a higher SEER rating (14.7 versus 9.4). 

The LW1822IVSM's quieter operation and modern features like WiFi control make it more suitable for residential use. At the same time, the Frigidaire is better for larger commercial spaces.

Frigidaire FHWW153WBE

The Frigidaire FHWW153WBE has a cooling capacity of 15,000 BTUs. It is designed to handle spaces up to 850 square feet, making it ideal for large bedrooms, living rooms, or office areas.

It's one of the more affordable large window ACs on my list, as it's priced at around $560.

With a SEER rating of 11.8, the FHWW153WBE provides a good balance between energy efficiency and cooling performance, ensuring you get the most out of every watt. 

I think this unit is perfect if you want to maintain a cool and comfortable environment in larger rooms without incurring high energy costs.

With a noise level ranging from 52 to 57 dB, the FHWW153WBE operates moderately quietly, which is crucial for maintaining a peaceful atmosphere in living or working spaces.

This makes it particularly suitable for bedrooms or home offices where a quiet environment is important.

 Still, I wouldn't place it in a window directly next to your bed.

It's relatively compact, and I successfully installed it in various window types. Overall, the installation process is hassle-free.

Compared to the Friedrich Kuhl KEL36A35A, the Frigidaire FHWW153WBE is far more budget-friendly and quieter.

This makes it a more suitable option for smaller spaces where budget and noise are concerns, rather than the extensive cooling needed for very large areas.

As a bonus, Frigidaire has recently updated this model to now include WiFi controls, making getting cool easier than ever. 

LG Dual Inverter LW1517IVSM

With a cooling capacity of 14,000 BTUs, the LG Dual Inverter LW1517IVSM is designed to cover areas up to 800 square feet, making it ideal for large bedrooms, living rooms, or office spaces. It’s priced at $599, and you get excellent value at an affordable price.

The LW1517IVSM  is another product that uses LG's innovative dual inverter technology, which significantly improves energy efficiency and reduces operational noise.

With an EER of 14.7 and Energy Star certification, this model ensures lower energy consumption than traditional portable air conditioners. 

It’ll reduce your electricity bills while providing consistent, powerful cooling. I believe this makes it a standout option if you prioritize energy savings without compromising on comfort. 

One of the premium features of the LW1517IVSM is its quiet operation, with noise levels ranging from 44 to 59 dB. 

This makes it an excellent choice for environments where maintaining a peaceful atmosphere is crucial, such as bedrooms or home offices.

The inverter technology contributes to its quiet operation and ensures more stable temperature control and faster cooling.

The unit also comes equipped with WiFi connectivity, which allows you to control the air conditioner remotely using a smartphone or other smart devices.

You can adjust settings, change modes, and even set schedules from anywhere. This is particularly useful for those with busy lifestyles or managing multiple rooms in a larger home.

Compared to the LG LW2516ER, the LG Dual Inverter LW1517IVSM offers more advanced features like WiFi connectivity and quieter operation (44-59 dB versus 61 dB).

While the LW1517IVSM covers a smaller area (800 versus  the 1,560 square feet of the LG LW2516ER), it's more energy-efficient and better suited for those looking for modern conveniences and a quieter cooling solution.

Do I need 25000+ BTUs or is 15000 BTUs sufficient for most homes?

The BTU rating will determine the size of the space the unit can cool efficiently. With rare exceptions, this is for a single room only, so 15,000 BTUs may be enough.

As an average of 20 BTUs per square foot, a 15,000 BTU air conditioner can cool a single room of up to 750 square feet. If your room is larger than this, though, you will need a higher BTU rated AC.

How can I fill in the gap left between the unit and the upper window frame?

Most AC units will come with wings that extend to fill the space leftover on the sides of the AC. However, the bottom and top of the AC may still have gaps. Teflon tape, weather stripping, or spray foam will fill the gaps and keep the drafts to a minimum.

Do I need a professional HVAC technician to install a window air conditioner?

In most cases, I recommend hiring a professional HVAC technician to install a window air conditioner. Professional installation is advisable due to their heavy weight and the need for a secure setup.

Moreover, many large ACs require a 230-240 volt outlet, which a professional can install if your home lacks one, ensuring safety and compliance with electrical codes.