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What Are Furnace Energy Efficiency Ratings?
That’s when the National Appliance Energy Conservation Act of 1987 required all new furnaces be 78 percent efficient, meaning ...
The Family Handyman on MSN3d
5 Types of Furnaces and How to Identify Them
Why Are There So Many Types of Furnaces? Most American homes rely on a furnace to provide warmth in cold weather. And because ...