5 Best & Biggest Window AC Units For Large Spaces

The modern air conditioners are capable of beating the heat but come at a high price. While many people can afford high-end air conditioning systems to keep their homes comfortable, not everyone has the means. Window conditioners are an affordable, efficient option for those with limited budgets. If you only need to install a window AC unit, and you want to achieve the maximum cooling effect, then you should get the largest unit. For large rooms, window AC units can cool places up to 1,500 sq ft. But what model should you buy? Before we go on to our list with the top window AC units that can be used in large rooms, please read this buying guide.

BTU, or tons, is used to measure the size of an air conditioner. Window conditioners are available in sizes from 5,000 BTU to 24,000+BTU. A window AC unit that produces more than 15,000 BTU is considered for large room. You can still use 110V units up to 15,000 BTU, beyond that you will need 230V voltage. It is simple to determine which type of window air conditioner you need. Simply look all the big 20,000+BTU windows AC units available in the market, then rank them according to their cooling capacities. We did exactly that. Below is a list of large-sized window AC units for large rooms.

How to Choose the Best Window Air Conditioner ?

Before you make a purchase, it is important to evaluate the various specifications and features of the large room window air conditioner. You’ll be able to determine if the unit is right for you or not.

Cooling Capacity In BTUs

You should first check the cooling power of window air conditioner. BTUs are the unit that measures how much cooling window conditioners provide. Keep remember the cooler the air conditioner is, the higher its BTUs are. If the BTUs are lower than necessary for large rooms, the AC will work harder to cool down. If the AC window has a very high BTU rating relative to your room’s size, it will not remove humidity effectively. To find the best model, you need to consider the area of your room.

Coverage Area Size

Another important thing is to consider the area that the AC unit will cover. A small AC unit will not cool your room at the optimal level, but it will also consume more electricity. You’ll end up paying more for energy and less cooling. The coverage area of an air conditioner system is something that most brands will mention in product box. A 15,000 BTUs air conditioner is recommended for rooms that are medium-to large in size.

Energy Star Certifications

Energy efficiency is another important aspect to consider when selecting the best window AC unit with highest BTU. You don’t want your monthly cooling bill to be high. Energy Star certification is a way to ensure that your air conditioning system is efficient. This label will ensure that units use approximately 10% less energy than their counterparts.

Editor’s Choice Biggest Window Ac Units For 230 Volts On Amazon


Biggest LG Window Air Conditioner For Large Rooms FRIGIDAIRE 28,000 BTU

Editor’s Choice

Frigidaire’s 28 000 BTU 230V window mounted heavy-duty air conditioner can cool up to 1,900 square feet. The quiet operation and quick cooling of the room ensures that you are comfortable even on hot days. The electronic controls are ready-to-use and allow you to adjust the comfort level according to your preferences. A temperature display allows you to see the temperature.

The remote temperature sensor allows you to easily set, adjust and maintain the temperature in any room. The fan has three speeds to provide more cooling flexibility. Additionally, the comfort control design with 8 settings allows you to control the direction and speed of cool air flow from any place the unit is located. Clean air Ionizer reduces allergens and pollen from the air, providing allergy relief. Please note this unit will only work with a 230V household outlet.

This Frigidaire model is the best option if you are looking for the largest window air conditioner, with 28,000 BTU and powered by 230V. It provides cooling of up to 1,900 square feet and dehumidification at 9.5 pints an hour. This is the most powerful window conditioner in this price range. It does its job flawlessly without making any noise. This unit also has many features, including visible temperature displays and a remote control system. It is easy to use right away after installation. unfortunately this window conditioner is not Energy Star certified. But its ionizer technology, which removes harmful impurities, is a big plus that you won’t find in other window air conditioners.

  • 28, 000 BTUs
  • Quickly Cools
  • 9.5 Pints Per Hour Dehumidification
  • Ionizer Technology
  • Easy to install
  • Remote Control
  • Low Noise
  • Heavy-Duty Air Conditioner
  • No ENERGY STAR Certified

Frigidaire – Window Air Conditioner 10.3 EER Rating – 25,000 BTU 230V

Editor’s Choice

Frigidaire’s window air conditioner, 25,000 BTU, keeps your room cool and comfortable. It has three speeds and multi-directional airflow. This air conditioner is easy to install. It distributes the weight in two pieces by using a slide-out chassis. Washable filter is easy to clean and captures dust from the air. Compatible with side panel (B0872Y4MCL) and mounting bracket (B0872XNZP3)

The FRIGIDAIRE FRE253WAE needs only 2430W to produce 25,000 BTU (or 2 1/12 tons). It draws just a little more than 10 amps and has a 10.3 EER rating. This unit can save you up to $500 per year compared with standard large window AC units.

The FRIGIDAIRE FHWC253WB2 large-room window air conditioner is most efficient. This AC unit can produce a staggering 25,000 BTU cooling output with a remarkable 10+ EER rating energy efficiency. This unit produces ample airflow, which distributes the cold air evenly over the 1,600 sq. feet. It has a maximum airflow of 460 CFM and is capable of producing more than 300 CFM to prevent the formation of unwanted ‘hot pockets’. This unit is the second largest unit, has excellent airflow, a 10.3 EER rating energy efficient, and it was made by FRIGIDAIRE, a trusted company in HVAC. It’s also very affordable unit with 25,000 BTU.

  • Easy Installation
  • ENERGY STAR Certified
  • Multi-Direction Airflow
  • Washable Filter
  • Eco Mode
  • Fresh Air Vent
  • Programmable Timer
  • Sleep Mode
  • Compatible With Mounting Bracket
  • Remote
  • Heavy

Whirlpool 22,000 BTU 230V – Window Air Conditioner for Large Rooms

Whirlpool White Energy
Editor’s Choice
Whirlpool White Energy Star

The Whirlpool 22,000 BTU window mounted air conditioner is easy to install and use. It can cool and dehumidify up to 1,400 square feet. You can adjust the cooling time to suit your needs and get comfort as soon as you arrive home. You have the choice of Eco, Sleep, or Normal cooling speeds to keep you and your family cool. The removable, washable filter makes maintenance easy. Whirlpool takes comfort and care to the next level. This unit will only work with a special 230V outlet. It cannot be used with standard 115V household outlets.

Digital control panel that offers multiple comfort options. It features 3 cooling speeds, as well as a programmable 24-hour on/off timer and 8-way directional louvers. Remote control is available for ease of use.

This Whirlpool large window air conditioner is the perfect choice if you are concerned about rising electricity bills. This unit is Energy Star-certified with an EER 10.4, which means you will get both efficient cooling and moderate energy bills. The air conditioner is easy to install on your window. It also comes with an instruction guide that will help you do the job yourself. Please note it will not work with standard 115V outlets found in most homes. It can be plugged into an electrical outlet with a voltage of 230V. This will provide 22,000 BTUs cooling power. This is sufficient to cool a large space measuring 1,400 square feet. The LCD remote control allows you to adjust the cooling levels according your preference. The air conditioner has a 459 CFM airflow capacity, which can also improve the quality of your air. The air conditioner dehumidifies your room at a rate of more than 5 pints an hour.

  • 10.4 Energy efficiency
  • 22, 000 BTU 
  • Cools up to 1, 400 sq. Ft
  • Remote control with LCD display
  • 459 CFM Airflow
  • Low Noise level
  • Auto-Restart
  • 24H Timer
  • Dehumidification 5 pints an hour
  • Heavy

Koldfront WAC25001W – Heat/Cool – 25,000 BTU

Koldfront WAC25001W
Editor’s Choice
Koldfront WAC25001W

Koldfront’s 25,000 BTU Heat/Cool Windows Air Conditioner (WAC25001W), can cool up to 1,500 feet of space during the summer months and heat up to 1200 square feet during winter. This air conditioner can provide cooling power of 25,000 BTUs and heating power of 16,000 BTUs. The electronic thermostat and digital display allow you to set the desired temperature and control other features such as the fan speed, energy saver mode and 24-hour timer.

The WAC25001W can provide supplemental cooling to a maximum of 1,500 sq. ft. and supplemental heating up to 700 sq. Use the remote control to adjust the temperature and fan speed anywhere in the room. To conserve energy, the fan will cycle on for two minutes every 10 minutes.

Koldfront WaC25001W is another window AC unit that produces 25,000 BTU. It is the second highest-powered window AC unit available. Frigidaire’s 25,000-BTU unit and Koldfront WaC25001W unit are very different because Koldfront require more energy input.  Koldfront WAC25001W needs 2660W to generate 25,000 BTU. This means it has a higher electricity input. Its EER rating is 9.4 (below 10). This unit can be used in large rooms with high moisture levels. This unit has a record-setting dehumidification rate at 137 pints per day, which is more than two dehumidifiers. Koldfront WAC25001W, a 2nd 25,000 BTU window conditioner for large rooms, is a great choice. It doesn’t have as much energy efficiency as the #1 Frigidaire unit.

  • Heat/Cool
  • 3 fan speeds
  • Dehumidification 137 pints/day
  • 16,000 BTU heating
  • 24 hour timer
  • 4-way airflow
  • 4 operation modes
  • EER rating is 9.4 (below 10)

KEYSTONE 25,000 BTU – Window Wall Air Conditioner

Koldfront WAC25001W
Editor’s Choice
Koldfront WAC25001W

Keystone’s affordable 25, 000/24, 700BTU 230V wall/window air conditioner has a removable chassis that can be installed in either a window or an exterior wall. This two-in-1 installation gem includes an adjustable window kit that makes it easy to install windows. You can either use an existing wall sleeve, or buy one.

This unit will only work with a special 230V/20A electrical outlet. It cannot be used with standard 115V household outlets. This unit is loaded with money-saving features, including an energy saver mode, sleep mode, and a programmable 24-hour clock. You can also enjoy the ease of “Follow Me”, LCD remote control. With this unit everyone will feel a sense of calm and blissful relaxation.

Keystone’s Keystone model is another huge window conditioner that provides at least 25,000 BTU cooling power in large rooms. This AC unit is a popular choice because of its easy installation and dehumidification functions. The best thing about this unit is the responsive temperature control system. This remote control device has a thermostat, which is not the case with regular remote controls. The AC cools you and helps you avoid unfavorable temperatures. This unit requires a special 230V outlet to operate the unit. It is Energy Star rated for its energy efficiency. This unit also has an EER rating of 12.1, which means you won’t have to worry about worrying about having to pay large bills each month. It is also easy to install. It includes a removable chassis as well as an adjustable window kit. You can save money on installation if you are a regular home-improvement contractor.

  • Cools a room up to 1,500 sq. ft
  • Energy Star efficiency 12.1
  • Remote Control
  • Low Noise level
  • Installation is a little difficult


Window air conditioners can be a great way to cool or heat your space. These air conditioners have unique features and don’t cost much to run. They are great for winter and summer, and they are simple to install and maintain. There are many things you need to consider before purchasing a high-performance window air conditioner. These features include cooling power, energy efficiency and airflow levels. It can be difficult to choose from the many options on the market. It is important to consider the advantages and drawbacks of a window AC. Before you look at each option, it is a good idea to make a list of your needs.

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