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Use this chart to select the correct unit for your space.

Area To Be Cooled (square feet) Capacity Needed (BTUs per hour)
100 up to 150 5,000
150 up to 250 6,000
250 up to 300 7,000
300 up to 350 8,000
350 up to 400 9,000
400 up to 450 10,000
450 up to 550 12,000
550 up to 700 14,000
700 up to 1,000 18,000
1,000 up to 1,200 21,000
1,200 up to 1,400 23,000
1,400 up to 1,500 24,000
1,500 up to 2,000 30,000
2,000 up to 2,500 34,000


Make any adjustments for the following circumstances:
  • - If the room is heavily shaded, reduce capacity by 10 percent.
  • - If the room is very sunny, increase capacity by 10 percent.
  • - If more than two people regularly occupy the room, add 600 BTUs for each additional person.
  • - If the unit is used in a kitchen, increase capacity by 4,000 BTUs.
  • - If you are mounting an air conditioner near the corner of a room, look for a unit that can send the airflow in the right direction.


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