This means it will turn on and off too frequently. It will cool the space too quickly, causing the system to short cycle. It’s important not to install an air conditioner that’s larger than recommended for your home. Use the following guideline to determine square footage based on your climate zone:įor heating, you’ll need 30 to 35 BTUs per square foot in Zone 1, 35 to 40 BTUs per square foot in Zone 2, 40 to 45 BTUs per square foot in Zone 3, 45 to 50 BTUs per square foot in Zone 4, and 50 to 60 BTUs per square foot in Zone 5. For example, you’ll need more cooling capacity in warmer southern regions and less in cooler, northern sections or in higher elevations.Ī 5-ton AC unit will cool a larger space if there’s less heating to overcome. The United States is divided up into 5 climate zones, which impact cooling requirements. The square footage of your home is one (although exposure to direct sunlight, ceiling height, and number/size of windows and doors can impact the AC you choose). Properly sizing your system requires considering various factors. But what does this mean as far as cooling your home? How Much Can a 5-Ton AC Unit Cool? Sizing Your AC A 5-ton AC unit will therefore have a capacity of roughly 60,000 BTUs/hr (5 x 12,000). Air conditioners are generally rated from 1 to 5 tons (although some range up to 6, 7, or 8 tons), with 1 ton being equal to 12,000 British Thermal Units, or BTUs, per hour. This has nothing to do with the system’s weight when used in this context. Oftentimes, you will see an AC unit’s capacity rated in tons.
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