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2000
There are at least 5 different definitions for slightly different BTUs. One of them says that 1 kWh = 3412.14 BTUs. Let's use that one. 1 kWh = 3412.14 BTUs 12 kWh = 40,945.68 BTUs
btu = 7500 watts * 3.14 btu / watt = 23,550 btus / hr
BTU's are not based on the length. To answer this question the wattage and voltage of the baseboard must be given.
Too broad a question. Need BTUs of heater + how many hours running per day to answer.
17,065
4800 BTUs will 150 square feet.
A small room is about 5,000 BTUs. Most people don't have a room that would require more than 10,000 BTUs.
90,000 BTUs - the 090 is what tells you the BTUs of the unit.
5,000
400 k BTU - But it depends on the gas line size feeding the heater; how long that run is etc. The larger heater will heat the water quicker thus cost for heating will be less ( than if you used a 250K BTU)
A 100 pound propane tank has a capacity of 2,160,509 BTUs