He suggests that Schmo take a look at an online forum called Heating
One Btu is equivalent to 0.293 watt-hours or 1,055 joules. The efficiency as a system may still be pretty low, though — some steam systems operate at less than 50% net efficiency." Dan N.But more efficient heating and cooling equipment is definitely on his list.Schmo plans to replace the older air-source heat pumps with new 5-ton models."Then we can figure out from fuel use against degree-days and the boiler's efficiency approximately how much heat pump it takes to get you there," he says.With Schmo reporting extremely inexpensive electricity (5.4 cents per k Wh vs.Its Achilles heel is a heating and cooling system that costs thousands of dollars a year to operate.