How to Choose the Right Size Air Conditioning System

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When deciding on a new a/c system to install, or replacing an old air conditioner, size matters!

When Deciding On A New A/C System To Install, Or Replacing An Old Air Conditioner, Size Matters!

When you live in Central Florida, choosing the right air conditioner for your home is crucial to  everyday comfort.

If you’re waking up in the middle of the night sweating or can’t stop the humidity outside from seeping in, it’s definitely time to evaluate your a/c system and whether it needs a repair or a total replacement.

What many homeowners might not realize is that the size of your a/c unit can actually be the root cause of uneven cooling and other air conditioning issues.

A/C Units that are too large for your space will short cycle.

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When sizing air conditioners, be careful not to make the mistake of getting one that is too large. If the system you install is too large for the space, it will short cycle.

Short cycling is when the compressor does not run long enough to dehumidify the space and this will limit your comfort. In addition, it will cycle on and off more frequently, increasing operating costs and reducing the system life.

Variables such as your insulation, type and number of windows, number of stories, construction type, etc. will greatly affect the required Btu’s per square for both heating and cooling.

Here a few other a/c sizing tips:

  • If your home is well insulated with updated  windows, you have the flexibility to go with a smaller size system that falls within your total square footage range. 

  • If your home could use better insulation, and has older or larger windows, we highly suggest choosing a larger system in your square footage range.

  • The less insulated and more windows you have, the more likely you will experience greater air and heat loss so you will need an a/c unit large enough to properly cool your home. 

Deciding on the right size air conditioning unit for your home can seem overwhelming! Our experts can walk you through the precise “Manual J” formula to calculate the exact right size for your needs. 

Need Help Sizing Your A/C Unit? Request a Free Estimate Now.​

Proper air conditioner sizing is critical to optimize performance- and at ASHC we offer financing on custom solutions to fit your specific needs guaranteed.


Install a Complete Lennox Comfort System with no payments and no interest for 12 months, and start improving your comfort today. 

Call (877) 675-7534 to talk to your local All Star Heating and Cooling office or Schedule an Estimate Now.


All Star Heating & Cooling, Inc., Air Conditioning Contractor, Port Richey, FL

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