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Window Air Conditioner Sizing Chart

Recommended window air conditioner sizing chart

Area to be cooled (Sq. ft.) Recommended BTUs
150 sq. ft. 5,000 BTUs
250 sq. ft. 6,000 BTUs
350 sq. ft. 8,000 BTUs
450 sq. ft. 10,000 BTUs
550 sq. ft. 12,000 BTUs
700 sq. ft 15,000 BTUs
1,000 sq. ft. 18,000 BTUs*
1,300 sq. ft. 22,000 BTUs*
1,500 sq. ft. 24,000 BTUs*

There are also other factors besides the square footage that need to taken into consideration when selecting the correct size air conditioner.  

  • How much direct sunlight does the AC or the room receive?
  • How many windows does the room have?
  • How many people are typically in the room?
  • Does the room also contain large appliances such as refrigerators or in use stoves?
  • Are the ceilings higher than the standard 8 to 10 foot tall?

If any of these addition factors apply you may want to consider going up to the next size window air conditioner based on the chart.   

* Higher capacity air conditioners require 230 volts and do not use the standard 120 volt plugs found in homes.

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