Choose Air Conditioner Based on House Surface

The central air conditioning wrong size can cause moisture problems, wasted energy and higher utility costs. Contractors use sizing calculation models such Air Conditioning Contractors J Manual US, detailing complex processes for calculating residential loads. While air conditioning professionals recommend more complex model for selection of precise unit size, using surface of your house to make decision is fast and simple method house.

square feet per ton method used for selecting recommended size air conditioner Ref 2. Draw sketches of your house on plain white paper ranges. Include all exterior walls.

Choose Air Conditioner Based on House Surface

Start at corner of one exterior wall and use measuring tape to measure length and width of each wall, rounding off measurements to nearest tenth of foot or nearest inch. tape measure that includes tenths of foot to display linear footage makes calculations easier. Write down measurements in linear feet.

Multiply measurements of each exterior wall. For instance, multiply measurements of 30-by-60-foot wall for total of 180 square feet. Add square foot totals for each wall measured to arrive at total square footage of house interior.

Since you are measuring for air conditioner size, you might need to subtract square footage of unfinished areas that are not heated or cooled, such as basements, crawlspaces and garages. Use method for determining air conditioner size in BTUs, or British Thermal Units. ton is usual measurement unit for cooling capacity of air conditioners.

One ton in air conditioning capacity – amount of heat it takes to melt 1-ton block of ice – is equal to 12,000 BTUs.

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How to Choose Air Conditioner Based on House Surface

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