Furnace Efficiency Calculator

Using this interactive tool, you can see for yourself how the efficiency of your home’s furnace and air conditioning system degrades over time and how maintaining your system can extend its life and save you money. That’s the power of regular maintenanceBase AFUE* %

Equipment Age Years

AFUE = Annual Fuel Utilization Efficiency


Projected AFUE With Regular Annual Maintenance


Projected AFUE With Sporadic Maintenance


* Published as: Degredation Factor for furnace efficiency (Hendron and Engebrecht 2010)