Should I Buy 80 Or 95 Efficiency Furnace at Buying

Should I Buy 80 Or 95 Efficiency Furnace. At first glance, most of us think that a furnace with a 95% efficiency rating (afue) is going to be a better option than a furnace that is 80% efficient. A 100,000 btu input 95% furnace is 95,000 btus output, and 1600 cfm for a 55°f temp rise.

A 100,000 btu input 95% furnace is 95,000 btus output, and 1600 cfm for a 55°f temp rise. For a 80 percent afue furnace, the gas burner is designed to run at optimal speed throughout the heating process. If the furnace only lasted 15 years, i would end up saving $1,050 over the life of the furnace.

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When buying a new furnace, there are more factors at play than we might notice initially. But this is too simplistic a perspective and not an accurate snapshot, as there are extenuating facts to consider. For a 80 percent afue furnace, the gas burner is designed to run at optimal speed throughout the heating process. With the 95% afue rating, it seems straightforward to choose this over an 80% afue furnace.