11 Best Window Air Conditioners (Review) In 2021
It may not be summer quite yet around most of the world, but that doesn’t mean you shouldn’t start thinking about the best window air conditioner to ensure comfort once the temperatures rise to potentially record highs yet again. Much like a quality home entertainment setup, a swimming pool, mini fridges, and BBQs, an AC unit is the perfect thing you need to spend those lazy summer days without going too crazy.
With a window air conditioner, you can guarantee total comfort, and with such a range of fantastic options around complete with an array of excellent features, you may never want to leave the chilled environment of your home ever again. From the powerful units to keep the whole family cool to more compact options for studios and apartments, here are the most effective options available, so get them while they’re hot. Or, should we say, while they’re cool?
The Best Window Air Conditioner
Our top pick for the best window air conditioner is the LG Window Mounted AIR Conditioner, which is available in a range of sizes to suit a variety of square footage to ensure that nobody gets too hot over the summer. It boasts a 2016 Energy Star rating to ensure efficiency, while the dehumidifier operates at up to 2.2 pints per hour. There are 3 cooling speeds, while the mesh filter is easy to clean and ensures excellent air quality.
The remote control is useful for when you’re feeling lazy, but while the temperature screen and lights are useful, they can be a little too bright when you’re trying to sleep. However, as it’s so quiet, you may not need to worry about being kept awake for too long. You may also be interested in some of these amazing ventless air conditioners, so check them out.
Works as a dehumidifier
For rooms up to 340 sq.ft.
3 cooling speeds & 3 fan speeds
24-hour on/off timer
- Weight58 pounds
Lights and screen are too bright
Our second window AC unit to check out is the MIDEA Window Air Conditioner, which is available as an 8000 BTU option and boasts 3-in-1 functionality to bring you an all-around superb option that’s ideal for a range of needs.
These modes include air conditioning, dehumidification, and fan-only to find the perfect setting, and you can adjust these using the remote control if you need to. It’s suitable for rooms up to 350 square feet, and installation is easy. However, the automatic mode may startle you if you’re not used to it, so switch it on before going to bed, otherwise, you may be awoken before you’re expecting it. For more quality options like this, check out our guide to the best wall AC units.
Works as a dehumidifier
For rooms up to 350 sq.ft.
Manual speed and temperature controls
24-hour on/off timer
Sleep, Fast Cool, & Eco-Energy Saver modes
- Weight54 pounds
Suitable for 350 sq ft rooms
Auto mode boom when activating
The Arctic King Window Air Conditioner comes with 5000 BTU that’s suitable for smaller rooms and studio apartments and offers a 11.0 combined energy efficiency rating to ensure low energy bills while still maintaining a cool environment.
There are an impressive 7 temperature settings, perfect for those who have partners who are always too hot or too cold. Similarly, the 2 cooling and fan settings provide further customization to suit your needs. It’s easy to install and even easier to control, while the worldwide warranty means you can get back to enjoying your summer inside should there be any problems. However, thre is no remote control, which means you’ll need to get up every time you need to change the settings. Be sure to also check out our guide to the best portable air conditioners for more amazing options like this.
For rooms up to 150 sq.ft.
Seven temperature settings
Two cooling/fan settings
Mounting accessories included
- BrandArctic King
- Weight39.6 pounds
Ideal for small rooms up to 150 sq ft
Worldwide part and labor warranty
No remote control
The hOmeLabs 8,000 BTU Window Air Conditioner is the perfect way to stay cool without having to take out a bank loan. Aircon systems can be super expensive and aren’t really worth the money if you only need one room to be cool. This window-mounted machine is capable of cooling rooms up to 350 square feet, which makes it ideal for large bedrooms, small studio apartments, and even one floor of a modest house.
One of the main advantages of this small air conditioner is that it comes with an Energy Star Rating. That means it has passed a bunch of tests based on its energy efficiency, so it should save you money in the long run. This unit has some great energy-saving features such as a 24-hour timer, Sleep mode, and Eco mode. Plus, it comes with a remote control that is easy to understand and gives you full control over your air conditioner, from the comfort of your seat. It also works as a fan and a dehumidifier, giving you even more control over the air quality in your home.
For rooms up to 350 sq. ft.
Energy Star Rating
24-hour on/off timer
Sleep mode and Eco mode
- Weight47.4 pounds
Very energy efficient
Lots of user-friendly features
Easy-to-use remote control
The Koldfront Heat/Cool Window Air Conditioner is one of the most powerful choices around and boasts an almost intimidating 12000 BTU to keep large homes cool throughout the blistering heat.
There are 4 modes which you can operate using a remote control, while the three fan speeds ensure you can find the perfect level of cool comfort for you and your family. There is a digital dehumidifier display that’s easy to read, and also a 25-hour timer, while the weather seals are included to ensure hassle-free installation. It almost sounds too good to be true, and that’s because it won’t operate using standard 115V outlets. Instead, you’ll need a special 230V outlet to enjoy all it can offer. Our guide to the best cooling tower fans features more great products to keep you cool in summer, so check them out.
12,000 BTU cooling power
11,000 BTU heating power
For rooms up to 450-550 sq.ft.
Energy Saver, Sleep, & One Touch modes
Four-way direction louvers
Remote control included
- Weight88.4 pounds
Suitable for 550 sq ft rooms
Weather seals included
Special 230V outlet required to power
With two BTU options available, the TOSOT Window Air Conditioner 2019 Model means you have a choice to find the ideal power for your needs. Regardless of which you select, though, you’ll still enjoy quick cooling through a modern design, and this is why we’ve selected it as our best value option.
The Smart Temperature control system makes it an AC unit that’s perfect for the 21st century, while the Energy Star rating is another feature that minimizes its impact on the environment. There are multiple wind directions so you can send cool air directly into your face or share some with the rest of the room, and this makes it so satisfying that you won’t mind that the lights may make it too bright to sleep beside. For more excellent options like this, check out our selection of the best cooling fans.
Two BTU options available
Smart temperature control
Energy Star rated
- Weight74.2 pounds
Multiple wind directions
Lights can be a little too bright when trying to sleep
Another powerful option is the SPT Window Air Conditioner which comes with user-friendly controls and a remote that means you don’t even need to get up off the couch to get comfortable over the summer.
The washable air filter keeps the air quality consistent and reduces the risk of mold and mildew, while three fan speeds provide a range of comfort options, with 6 additional modes to help you adapt to the interior temperature. Despite this, the cooling still doesn’t feel as effective as other options around, but this could be because of the square footage of your room, so make sure it is within the recommended 550 square foot area. Be sure to also check out our guide to the best wall mounted fans for more great products to help you stay cool.
Washable air filter
3 fan speeds
- Weight73 pounds
Thermostat controlled energy saver
550 sq ft maximum area
61 – 86 degree range
Cooling does not feel as effective as other models
The Danby Window Air Conditioner with Remote Control provides 3 BTU levels, 5000, 6000, and 15000 to give most people a solution for cooling their apartment, bedroom, living room, or games room. The electronic controls are intuitive, while the LED display is clear and easy to understand.
There are three fan speeds to help you find the optimal comfort to enjoy your summer should you need to take a break inside, while the 4-way air direction means you can target it where you need to so you get the most benefits. It works relatively quietly, or at least the motor does, but because the screws and holes are not aligned as you’d like them to be, there may be a slight rattling noise when using it. While it isn’t too distracting, it isn’t exactly what you want when trying to relax out of the sun. You may also like some of the best pedestal fans from our list, so check them out.
3 BTU options
3 fan speeds
Energy Saver switch
- Weight44.1 pounds
Suitable for 250 sq ft
4-way air direction
Slight rattling noise
As the name suggests, the FRIGIDAIRE Energy Star Window-Mounted Mini-Compact Air Conditioner is a smaller option that will provide plenty of power to keep your room cool. This is thanks mostly to the quick cooling design that operates immediately to ensure comfort almost straight away using the low-power start-up.
Unlike some other options we’ve identified, it operates on a standard 115V outlet, making it suitable for every home across the country. The 6-way temperature control also provides excellent variety to help you find the right temperature. However, it is surprisingly noisy for its size, which isn’t great if you want to use it in the bedroom. Of course, for small living rooms in apartments, this may not pose too much of a problem. Don’t forget to also check out our guide to the best bladeless fans for more great products you may like.
Energy Star Efficiency
115V outlet requirement
6-way temperature control
Low power start-up
- Weight52.5 pounds
Resumes operation after power outage
Suitable for 350 sq ft
A little too noisy for our liking
Our final window mounted air conditioner is the FRIGIDAIRE Heavy Duty Slider Casement Window Air Conditioner which delivers 8000 BTU, which is enough to cool a 350 square foot area with ease and without wasting too much energy.
It’s specially designed for casement windows, which is good for those who have such windows, but not so-great-news for those who don’t. If you are one of the lucky ones, though, you can enjoy 4-way air direction, a full-function remote control and a 1 year full warranty to overcome any issues early on. The washable mesh filter will keep air quality excellent, and it isn’t loud when turned on. But the static vents mean you can’t always direct it entirely towards you, so you might need to make some adjustments to the sitting arrangements. For the fans of smart technology, we have prepared our selection of the best smart air conditioner.
Specially designed for casement windows
3 pint/hour dehumidifier
1 year full warranty
4-way air direction
- Weight66 pounds
Washable mesh filter
Suitable for 350 sq ft
Our second MIDEA Air Conditioner rates at 6000 BTU that make it excellent for smaller spaces while still providing excellent 3-in-1 performance to keep you cool all summer long. The quick cooling design is ideal for those days getting back from work and feeling so sweaty you may slip off the sofa, while the 24-hour timer and sleep mode are ideal for saving you time fiddling with the controls. The ECO Energy Saver will also be kind to your bills.
The clear LED screen means it’s easy to read the temperature, even from a distance, but it doesn’t seem as accurate as other options around. Despite this, with enough experience, you should get a taste of which level works best for you. You may also be interested in some of the best RV air conditioners from our list, so be sure to check them out and pick the right one for your next trip.
Dehumidification and fan-only modes
LED display panel
- Weight50 pounds
Suitable for 250 sq ft
Clear LED screen
Thermostat is not as accurate as other options
Window Air Conditioner Buying Guide & FAQ
Features To Look For In A Window Air Conditioner
Before deciding which is the best window air conditioner for your needs this summer, check out these essential key features to look for.
BTUs - BTU, or British Thermal Unit, is the measure of how much power you need to cool a room. Typically, 20 BTU is equal to a single square foot, although this can change depending on ceiling height, doors, and other obstructions or layouts of the room. When deciding which BTU level is suitable for your needs, it’s useful to measure the area of whichever room you plan on installing it for.
Despite this, because window air conditioners are not the same as central AC units, it’s often not suitable to use a larger BTU for a small room with the hope to cool the whole house, as it could make the closest room too cold, causing discomfort, while not sufficiently providing enough air circulation to cool the rest of the house.
Compressor Type - You will find two types of compressors on AC units. These are Rotary and Reciprocator. For Rotary compressors, you’ll find they are quieter, which is ideal for offices, living rooms or bedrooms where you would prefer the environment to be as non-disruptive as possible. However, to get the best results from a Rotary compressor, you need to use it constantly.
Alternatively, Reciprocator compressors are more efficient and also easier to clean, which is good news for those who know it’s their job to keep an eye on maintaining the AC unit. As both options have their benefits but also disadvantages, it can be challenging to decide which is best for your needs, so consider what you would prefer from a window air conditioner, and which is most applicable to your situation.
Connectivity - Connectivity is another thing you should be aware of, as your AC unit will not operate unless it is plugged in. While most units use the standard 115V plugs which fit into your everyday socket, not all are suitable for this, and they may use a unique plug type that means your unit won’t work. Before installing your unit, it is best to check that the plug is suitable for the socket.
It’s also vital to consider the power cord length. Ideally, you need a cord that will reach the nearest socket without being tight to prevent interior damage. This isn’t always possible, so you can use an extension cable if needed, but this shouldn’t be something that you rely on immediately without first trying the standard length.
Control - Remote controls are a useful feature to look for in your window air conditioner as they allow you to adjust settings from anywhere in the room. Through these settings, you can increase or decrease the temperature, and you can also cycle through modes to find the perfect setting for the current situation.
Even units without remote controls are useful, though, even if you need to stand by the unit to change the settings. Typically, you adjust these settings by hand using the dial, although there may be some options that use a digital display and buttons to push to help you find the right temperature.
Efficiency Rating - Energy efficiency is something that everyone needs to look for when choosing their window AC unit, especially if they live in a hot climate that will require the unit to be on all day, every day. While single window units are not as expensive to run compared to a central AC system, they will add up on your monthly bill.
On average, it costs around $2 to run a window AC unit for 24 hours. If you do this every day, that is $60 extra dollars a month, even with an efficient unit. To keep these costs down, look for a high energy Star rating to ensure your unit will not cause too much disruption for your monthly energy bill.
Filters - AC filters are the unsung hero of the whole unit. They operate behind the scenes and keep debris and dust from being spread around the house. Because window units draw air in from outside, these filters are essential for the consistent performance and quality that you need from your window air conditioning unit.
Mesh or foam filters are the most common varieties available, and if possible, it’s useful to find a filter that you can wash and then put back into the unit. This takes the hassle out of purchasing replacement filters, although you might find it difficult to clean at first.
To make sure this isn’t an issue, it’s best to stay on top of your filter cleaning, doing so every two weeks. This will also prevent mold buildup, which is another thing that can affect air quality.
Installation - Before selecting the perfect window AC unit for your home, you will need to make sure that it will fit within your existing window frame. This is possible for most units and windows. However, if you have an older house, or one with non-standard windows, you may need to undertake some modifications, or at least hire someone to do so for you.
Installation itself is relatively simple, and all you need is a screwdriver and a window. Most window air conditioners come with all the mounting hardware you need, including window seals to keep the cold out if you want to keep the unit in throughout the year to save you the hassle of reinstalling it.
Size - The window AC unit will be smaller compared to your standard central air conditioning system, but knowing the size of the unit is still important. This will help you gauge whether your window will accept it and also give you an idea of the weight to make installation easy.
Furthermore, the size could impact how effective it is for different-sized rooms. Your small window may only be suitable for an AC unit to cool up to 250 square feet. Before doing anything, be sure to note down the size of your room and your window to help you identify which unit is most suitable for your needs.
Timers - Timers are a useful feature to have for a range of reasons. They are most commonly used by those who like to have the AC on when going to sleep, but also don’t want it on all night. With a timer, you can set it to operate for an hour or more, and then switch off automatically. This saves energy and also prevents your room becoming too cold throughout the night.
You can also use timers for the unit to operate when you go out so you can come back to a cool house or apartment. Furthermore, if you find that you always forget to switch the unit off manually, a timer will stop the unit operating for too long, which will enhance performance for when you really need it and also increase its lifespan.
Window Air Conditioner FAQ
Q: When is a window AC unit better than central AC?
A: A window AC unit is better compared to central AC when you live in a smaller space, such as needing it for a bedroom or studio apartment. As window ACs are more compact, they do not use as much energy. However, if you need AC supplied to the whole house, central AC is more energy efficient than operating several window units throughout.
Q: How long do window AC units last?
A: Window AC units have a lifespan of around 10 years. However, this is not true of every unit, and to ensure you get the most from your window AC unit, you must ensure you take care of it. This means regularly cleaning the filter when using it and getting it serviced at least once a year, depending on where you live. Obviously, units used only a few months every year will last longer than those used all year-round.
Q: Do window AC units bring in outside air?
A: Yes, a window AC unit will draw air from outside and convert it to cold air to cool your home. This is different compared to larger, built-in air conditioning units, which use cool and pressurized refrigerated air to keep the house cool and comfortable over the warm months. Because of the way window units operate, therefore they are not ideal for cooling the whole house.
Q: Can you leave a window air conditioner on 24/7?
A: No, not only is this bad for your energy bills, but it could also damage the unit. At the end of the day, it is still an electronic device that could be prone to overheating if not cared for properly. Similarly, if you are going out for a while but want to keep your room cool, it’s best to turn the power down to the lowest level to save energy and prevent the risk of damage while still ensuring comfort once you get home.
Q: How much does it cost to run a window AC unit all day?
A: The cost to run a window AC unit all day will vary depending on the size of the unit, your standard energy tariff, as well as how high you put the settings. However, because modern units are designed to be more energy efficient, it will probably not cost you more than $2 per day. This doesn’t sound like much, but if you leave it on all day, every day for 30 days, that’s a $60 add on to your regular utility bills.
Q: Can a window unit cool a whole house?
A: A window AC is not designed to cool the whole house, so it’s not advised to purchase one purely hoping to keep the whole house comfortable. Window AC units are not powerful enough to provide an adequate cooling performance for the whole house. Here, it’s better to invest in a central AC unit. However, for single rooms and studio apartments, a window AC unit should be suitable.