12,000 Btu is 4.7hp
There is no direct relation between volts and BTU.
18000 BTU means TON 1.5 ,12000 BTU means 1 TON
1hp = 2544 Btu
12000
12000BTU is 4.7hp
650 sft multiplied by 26 which means 16900. I BTU =12000 Divide 16900/12000 = 1.4 ton
400hp is 1,017,773 Btu
12000 per hour
33,475 btu's in a boiler horse power
usually 20 btu's per square foot so......12000 btu's should do fine
12000 btu = 1 ton 1 ton per 400 sq ft 1200 / 400 = 3 3 times 12000 = 36000 btu
10000Btu is 3.93hp