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A standard 80% AFUE furnace is usually sufficient. The extra cost of a high-efficiency unit may never be recovered because the furnace runs so infrequently. 2. Consider Installation Complexity
The ideal furnace efficiency for your home depends primarily on your , installation location , and how long you plan to stay in the home. 1. Match Efficiency to Your Climate what efficiency furnace should i buy
The physical location of your furnace can significantly change the "real" cost of upgrading. Should I Get An 80 Or 95 Percent Efficiency Furnace? A standard 80% AFUE furnace is usually sufficient
A 90%–95% AFUE model often provides the best balance of initial price and monthly savings. Should I Get An 80 Or 95 Percent Efficiency Furnace
Efficiency is measured by (Annual Fuel Utilization Efficiency), which indicates the percentage of fuel converted into usable heat.
Buy a 95% AFUE or higher furnace. In these regions, the heating season is long enough that the 15%–20% fuel savings compared to a standard model will typically offset the higher upfront cost within a few years.