What Size AC Unit Do I Need?

With so many options on the market, finding the right cooling system for your home in Austin can be overwhelming. There are many things to consider, like price, SEER ratings,  and finding a unit that is the right size. We’re here to help! The professionals at ABA Austing offer air conditioning maintenance, replacement, and installation services for homeowners near Austin, Texas. If you’ve been shopping for a new air conditioner in Texas, let our team at ABA Austin help you find a unit just right for your home.

ac replacement

Start With a Load Calculation

The best way to figure out what size AC you’ll need is to perform a load calculation. A load calculation considers your home’s size and an air conditioner’s cooling capacity. The easiest way to get this information is to call our team to perform a load calculation for you, but if you’re determined to try to DIY it, here’s a helpful guide:

  1. Determine the square footage of your home: Measure the length and width of each room in your home and multiply these numbers to determine the square footage. Add up the square footage of all rooms to determine the total square footage of your home.
  1. Determine the cooling capacity: The cooling capacity is measured in BTUs (British Thermal Units) and is based on the size of your home and the local climate. A BTU is the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit.
  1. Consider the climate: In Texas, the climate can vary depending on where you live. For example, if you live in coastal areas with high temperatures and humidity, you may need a larger AC unit to cool your home effectively.
  1. Factor in other variables: Other variables that can affect the cooling load of your home include the number of occupants, the type of lighting, the amount of shade or sun exposure, and the quality of insulation.
  1. Choose the right size: Based on the load calculation, choose an AC unit with the appropriate cooling capacity for your home. A unit that is too small won’t cool your home properly, while a unit that is too large will waste energy and increase your utility bills.
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Examples of AC Sizes for Your Home

You can use a size chart to steer you toward what cooling capacity you’ll need for your new AC. Here is a suggestion on what cooling capacity is generally recommended for different square footage:

Home Square Footage

Air Conditioner Size (Tons)

It’s important to remember that these are just general guidelines, and the appropriate AC size for your home may vary depending on several factors. It’s always best to consult a professional HVAC technician at ABA Austin to calculate load and determine the appropriate AC size for your home.

Helpful Tips For Choosing a New AC

Something to consider: Size isn’t everything. Here are some other factors to think about when you’re looking for a new air conditioner:

You can always count on the ABA Austin team to help with your heating and cooling systems. Call us at 512-687-1463 for a free AC repair estimate, or read one of our other blogs for information on common air conditioning topics: