18,000
21,000
Roughly 550.
btus needed to heat & cool 625sf room
how many square feet does a 14,000 btu heater heat
900
18,000
21,000
About 365 square feet.
Roughly 550.
400 to 450
600 square feet.
1500
Roughly 320-350 square feet.
14,000
1500 sq ft.
Based on "rule of thumb" 1 ton (12000 BTU) cools 500 square feet. Therefore a rule of thumb answer would be 14,400 BTU