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You mention the outside air temperature. But most dryers are inside a house with controlled air temperatures. If this is sitting in an open shed consuming outside air, and temps are high, you might not be spending much on energy for a conventional dryer. But if it's in a house where the air conditioner is running, it's constantly sucking in the air you paid ...


2

There are 3 main problems with a conventional dryer, which heat pump dryers aim to solve. They are creating heat rather than moving it. To boil away 1 pound of water out of your wet clothing, a dryer must bring 1100 BTU* of heat. Traditional dryers (gas or electric) create 1100 BTU of heat. That means either a) burning 1100 BTU of gas heat locally, or b) ...


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