400hp is 1,017,773 Btu
33,475 btu's in a boiler horse power
1hp = 2544 Btu
12,000 Btu is 4.7hp
1 HP = 2446 btu/hr and 1 kWh=3413 btu/hr so 1kWh = 1.413 HP, thus 45kWh x 1.413 = 63.585 HP.
10000Btu is 3.93hp
how many btu does a 125 hp boiler produce on #2 oil
400 watt hours = 1,364.86 BTU
1 Btu/hour [I.T.] = 0.000 393 014 779 53 horsepower [international] 1 Btu/hour [I.T.] = 0.000 392 856 662 2 horsepower [electric] 1 Btu/hour [I.T.] = 0.000 398 465 762 18 horsepower [metric] 1 Btu/hour [I.T.] = 0.000 392 834 018 95 horsepower [water]
BHP on a ship is a U.S. thermal unit of measurement, and stands for "Boiler Horsepower". One BHP unit is equivalent to 33,475 BTU (British Thermal Units).
A typical home boiler uses 3000 Watts. 3000 watts is not the correct answer. Watts = volts x amps, or if converting to btu 3000 watts = 10236 btu. At typical household votage of 120, 3000 watts would equal 25 amps and no boiler uses that much current and if your desire is to convert btu to watts I would suspect the average boiler output is far greater than 10K btu. Determine the output in btu/hr of the boiler in question from the MFR`s nameplate and divide by 3.412 3.412btu=1watt/hr. My home boiler uses 3000 watts, it's in my kitchen cupboard and it runs on a 240 v supply.
The output rating of a 96% efficient boiler or furnace rated at 100,000 input.
400 to 450