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I understand why new furnaces are more efficient, but why AC?
I think I understand why new furnaces are more efficient, but why AC?
I finally read an explanation about the exhaust air being cooler, as low as 90 degrees F from gas furnaces, and more heat extracted from the fire to heat the house, in new furnaces. I presume new oil furnaces are more efficient the same way. But why are new AC's more efficient. There is no cold air going up the chimney with an old AC. I presume that if the refrigerant doesn't lose all its coldth, warm up to room temperature, in the AC evaporator inside the main air duct, when it returns to the condensor, it's that much easier to condense because it is colder, and less heat has to be radiated out from the condensor fins. So iiuc there is no loss there, at least if that pipe is insulated. So why are the new ACs more efficient? |
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