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Tips for Choosing the Right Air Conditioner Size

When you start looking for an air conditioner for your home or apartment, you may become overwhelmed at all the air conditioner sizes on the market today. It can be confusing to figure out the right air conditioner size for your home, but it’s an important calculation to make so that you don’t get one that underperforms or one that is much bigger than you actually need. These tips for choosing the right air conditioner size will help you make the best decision for your property.

Square Footage

The main factor you must consider when purchasing an air conditioner is the square footage of the space you want to cool. This sounds simple, but it’s not as straightforward as it might seem. You also need to think about the heat gain and loss in your space and environmental factors that could affect how well your home cools down. In general, take the square footage of the area you want to cool and multiply it by 35 to get the BTU output required to adequately cool the space.

For example, if you are looking to cool a space that is 100 square feet in size, you would need an air conditioner that generates at least 3,500 (100 x 35) BTUs to properly cool your room. If you have a home that is 2,000 square feet, you would need an air conditioner that puts out a minimum of 70,000 (2,000 x 35) BTUs so that every room in the house is adequately cooled.

Environmental Factors

Of course, if you live in a cool environment, you may not need an air conditioner at all. But even in places where winters are harsh, an air conditioner can help in the summertime. The climate you live in, though, can affect the size of air conditioner you need. For instance, if you live in a very hot and humid climate, you may want a larger air conditioner so that it doesn’t have to work as hard to cool your home. A dry, mild climate can probably get by with a smaller unit because it will hit the desired temperature much easier than it will in a hot, humid area. An HVAC professional can help you determine the right air conditioner size for your specific environment.

Other Factors

In addition to square footage and environmental factors, there are a few other considerations that go into choosing the right air conditioner size. Take into account how many people are in the house and rooms at one time (more people means a hotter home), whether your home is more often in the sun or shade, and the purpose of the room you’re trying to cool. For example, if you’re looking to install an air conditioner in your kitchen, you may need a larger unit because the stove and oven will heat the room to a higher temperature than other rooms.


Installing an air conditioner can make your home much more comfortable during the hottest parts of the year. But if you don’t think about what air conditioner size you need before you buy, you could end up with a unit that doesn’t meet your expectations. When in doubt, consult a professional to help you select an air conditioner for your unique needs.


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About the Author

Kaya Wittenburg

Blog Author and CEO

Kaya Wittenburg is the Founder and CEO of Sky Five Properties. Since the age of 10, real estate has been deeply ingrained into his thoughts. With world-class negotiation and deal-making skills, he brings a highly impactful presence into every transaction that he touches.

He is here to help you use real estate as a vehicle to develop your own personal empire and feel deeply satisfied along the way. If you have an interest in buying, selling or renting property in South Florida, contact Kaya today.

Feel free to call me at: (305) 357-0635
or contact via email: [email protected]