Efficiency is measured by (Annual Fuel Utilization Efficiency). A higher AFUE means less wasted fuel and lower monthly bills.
: Lowest upfront cost ($2,500–$7,000 installed) but significantly higher monthly bills, especially in cold climates. They are quieter and safer as they don't produce carbon monoxide. how to buy a furnace for your home
: Higher upfront cost but can reduce heating bills by 15% or more; recommended for cold climates. Look for the ENERGY STAR® label to identify top-performing models. 3. Size It Correctly (BTUs) Furnaces Buying Guide - Save on Energy how to buy a furnace for your home