Room Size Calculator


 
Use this table to calculate the cooling capacity you need in a portable air conditioner for your  computer room, or residential application.
Area to Be Cooled
(sq.ft.)
Capacity
(Btu/Hr)
100 to 150
150 to 250
250 to 300
300 to 350
350 to 400
400 to 450
450 to 550
500 to 700
700 to 1000
5,000
6,000
7,000
8,000
9,000
10,000
12,000
14,000
18,000

Please note:

  • If the room is heavily shaded, reduce capacity by 10%.
  • If the room is very sunny, increase capacity by 10%.
  • If more than two people regularly occupy the room, add 600 Btu/Hr for each additional person.
  • If the unit is for a kitchen, increase capacity by 4,000 Btu/Hr.

One ton of air conditioning is equal to 12,000 BTU's.