The 3 Best Window Air Conditioners With Heat

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If you want to stay comfortable all year round while cutting back on energy costs, then using one of the best window air conditioners with heat can help. These multi-functional window-based AC units are efficient, easy to install, and able to save you money since you're only cooling or heating the rooms you need.

The heating features in window AC units function similarly to the cooling options. Your window air conditioner will require a minimum of 20 Btus (British thermal units) for each cubic foot of living space you’re trying to warm up. So, for most rooms, an AC window unit with a heater Btu of 10,000 or higher will suffice. Features that might be nice to have include a remote control and the ability to program specific temperature settings.

Window air conditioners with heat fit right in your window which make them easy to install. However, when you're not using your window AC heater during the winter, you may be exposed to cold drafts. So, be careful to close up any cracks or remove the unit from your window when not in use.

For both supplemental cooling and heating I've checked out the power, the features, and the reviews to recommend the best window air conditioners with heat for your specific needs whether it’s staying cool in the summer or toasty during the winter months.


The Best Window Air Conditioner With Heat, All Things Considered

The Koldfront heating and cooling window air conditioner is perfect for year-round use in rooms up to 450 square feet. This unit has a powerful 10,000 Btu cooling capacity and 10,600 Btu heating option with an electronic thermostat and remote control making it not just a well-constructed unit but also a great value for what you get.

There are also three fan speed settings with a dehumidifying mode and a 24-hour timer as well as sleep and energy saving modes, too. This comes with all the installation hardware plus weather seals for better insulation. It's customer-approved with a 4.5-star overall rating.

A helpful review: “Very [quiet]. Going to heat and cool 420 square feet garage shop room.”


The Runner Up

It may not come with as many glowing reviews, but this air conditioner and heater packs a whopping 12,000 Btu capacity for the AC and a 3,500 Btu capacity for the heat function. This unit has three speeds on the cool function and one when using the heat, and even a handy remote control you can use to set the temperature from wherever you are. While there’s no specific square footage listed for the heat function (some users say it can work for rooms up to 450 square feet), the air conditioning features can tackle rooms up to 350 square feet in size.

A helpful review: “Living in the Texas heat without an air conditioner has been severely hot inside, like 90 degrees in the house. We bought one of these from Amazon 3 days ago and it has been a total life changer!”


The Best For Small Windows & Small Rooms

It may not meet the above requirement of 10,000 Btus or higher, but this smaller air conditioning unit will fit better into smaller windows, and is great for rooms up to 320 square feet in size. This affordable unit has a 7,500 Btu capacity, comes with a remote control, and has two cooling, heat, and fan speeds so you can choose the power you want. And while any window unit will be a bit loud, this one is just 50 decibels which is about as quiet as you’ll find in any window AC.

A helpful review: “Great unit, quieter than an old tired unit. For a bonus it has heat which makes our living room usable in winter time.”


Also Great: A Portable Standing Air Conditioner With Heat

For homeowners or renters who don't want to deal with the hassle of window AC units or live where they are prohibited, a portable air conditioner like the Black + Decker air conditioner unit with heat might be your best option. It stands on the floor by your window and has wheels so it can easily be moved from room to room. It can cool or warm spaces up to about 350 square feet according to the manufacturer, but plenty of reviewers found that it worked for even larger spaces. Bonus features include a remote control, a 24-hour timer, sleep mode, and LED digital display. There are even four cooling and three fan settings.

A helpful review: “[...] All in all, I'm really satisfied with the way this is setup. Not only does it look natural, but I can keep using my window on nice days without having to move the A/C unit. [...] I've tried the heating mode once, and it really works. It sounds like it just flips an internal valve or something, but instead of removing heat from the room and exhausting that heat, it does the exact opposite. So I'd assume the air coming out is around 130 (mentioned above), but it definitely isn't dangerous and doesn't feel hot to the touch.”