In colder climates especially, 90% AFUE furnaces can deliver significant energy savings. If you live in the northern half of the US, Energy Star recommends furnaces that deliver 95% AFUE or higher. The differences mainly come down to efficiency ratings, followed by the motor type and stages of heating. ![]() Gas furnaces can all look the same on the outside, but how they perform inside your home can vary widely. ![]() It keeps cycling this way - Answered by a verified HVAC Technician We use cookies to give you the best possible experience on our website.
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