How to Recognize a Highly Efficient Furnace
A highly efficient furnace is the result of careful engineering based on eliminating the weaknesses of older furnace models. In particular, a highly efficient furnace prevents heat from escaping up your vent pipe and makes the output of your furnace more responsive to the cooling demands inside your home. By learning more about how furnaces work, you can choose the type that is right for you. Heat Exchangers Furnaces produce heat by the combustion of fuel.