Is Your Heating & Cooling System the Right Size?
HVAC System Size

HVAC Equipment is Not One Size Fits All

When it comes to heating and cooling your home, it’s very important you get the correct size.  The size of your equipment actually plays a huge role. If you buy an HVAC system that’s too big, you’ll end up wasting money and energy. And if it’s too small, you won’t get enough cool or warm air flowing through your home.

When we refer to size, we’re not talking about the physical size of your unit, we’re talking number of BTUs. BTU is a unit of measurement for energy. One BTU is an amount of energy. One BTU will raise the temperature of one pound of water one degree Fahrenheit. You can usually get a rough estimate of the BTUs needed by looking at the square footage of your home. HVAC System Sized by the square foot is only an estimate. Building materials and location with affect demand too.

Room BTU Chart

Room SizeBTU Needed Room SizeBTU Needed
150 sq. ft.5,000 BTUs600 sq. ft.13,000 BTUs
250 sq. ft.6,000 BTUs650 sq. ft.14,000 BTUs
300 sq. ft.7,000 BTUs700 sq. ft.15,000 BTUs
350 sq. ft.8,000 BTUs750 sq. ft.16,000 BTUs
400 sq. ft.9,000 BTUs800 sq. ft.17,000 BTUs
450 sq. ft.10,000 BTUs850 sq. ft.18,000 BTUs
500 sq. ft.11,000 BTUs900 sq. ft.19,000 BTUs
550 sq. ft.12,000 BTUs9850 sq. ft.20,000 BTUs
12,00 BTU is queal to 1 ton

GEN3 Electric & HVAC can help you determine exactly which make, model, and size unit is best for you and your needs. And sometimes, having a little extra power isn’t bad, as it will ensure your system can handle the load on days with extremely high or low temperatures. But having too much will cause your system to wear out faster. If you end up with a unit that’s too small, you may regret it on the hottest or coldest days of the year.

Just beware of getting too big of a unit, because it will heat or cool your home too quickly and then shut off. This frequent on-and-off cycle will cause uneven temperatures and higher energy bills. A good rule of thumb is the maximum size unit you should buy would be 15% over the BTU’s you need for cooling and 40% of the BTU’s for heating. The max for heat pumps is 25%, since it handles both heating and cooling.

Call GEN3 today to schedule an estimate for your new system, or get a second opinion you can trust!


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