• How do I know what type of A/C unit I need at my Collinsville, IL home?

    April 22, 2019
  • How to choose a new A/C unit in the Collinsville, IL area

    Do you live in the Collinsville, IL area and are in need of a new A/C unit? If so, you might be wondering how to determine what type of A/C unit you need. The good news is, the process of choosing the right unit for your home is actually really simple. There are only a few things you need to take into consideration.

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    When It Comes to ACs — Size Matters

    The most important thing you need to consider is the size of the unit you need. It has to be large enough to cool your entire home without a lot of unnecessary effort. If you purchase an A/C unit that’s too small for your home, it will run constantly trying to get your home cooled to a comfortable temperature. This wastes a lot of unnecessary energy, which results in higher utility bills, but it’s also hard on the unit itself, which could result in hefty repair bills down the road.

    If you purchase a unit that’s too large for your home, it will turn on quickly, cool your home rapidly, and then, shut off completely. Sure, your house will be cool, but the constant on/off cycling uses more energy, which means higher utility bills for you.

    To determine the right size AC for your home, multiply the total square footage of your house by 30. Then, divide by 12,000 and subtract 1.0 to determine the proper tonnage. So for example, if you have a 1,500 square foot home, you would multiply 1500 by 30 to get 45,000. Then. divide 45,000 by 12,000 to get 3.75 and subtract 1.0 from that to get 2.75. This tells you, you’d need a 2.5 or 3-ton AC for your house.

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    Climate Considerations

    Because Collinsville, IL has a pretty moderate climate, you don’t need to worry about purchasing a slightly larger unit than calculated. (People who live in hot/humid climates shouldn’t subtract 1.0 at the end of their calculation, because they need a unit that’s large enough to handle high heat.)

    There are recommended square footage ranges for AC units that are compiled by climate zones. Collinsville, IL, sits in Zone 4, so it’s recommended that you purchase a:

    • 1.5- ton unit if you have a home between 700 and 1050 square feet
    • 2-ton unit if you have a home between 1051 and 1350 square feet
    • 2.5-ton unit if you have a home between 1351 and 1600 square feet
    • 3-ton unit if you have a home between 1601 and 2000 square feet
    • 3.5-ton unit if you have a home between 2001 and 2250 square feet
    • 4-ton unit if you have a home between 2251 and 2700 square feet
    • 5-ton unit if you have a home between 2751 and 3300 square feet

    Because the size of the A/C unit you purchase is so important, you should consider contacting a professional HVAC contractor, like the ones at Fairview Heating, Cooling, and Appliances, before making any final decisions.