Furnace Energy Savings Calculator
See how much you could save on heating bills by upgrading to a high-efficiency furnace.
Furnace Energy Savings Calculator
Enter your current and proposed furnace efficiency ratings along with your annual heating bill.
Frequently Asked Questions
How much can a high-efficiency furnace save?
Upgrading from an 80% AFUE furnace to a 96% AFUE model can save $200–$400 per year on heating bills. Over 15–20 years, that adds up to $3,000–$8,000 in savings.
What does AFUE mean?
AFUE (Annual Fuel Utilization Efficiency) measures the percentage of fuel that becomes useful heat. An 80% AFUE furnace wastes 20 cents of every dollar on exhaust. A 96% AFUE unit wastes only 4 cents.
How long until a high-efficiency furnace pays for itself?
Typical payback period is 5–10 years depending on your climate, fuel costs, and the efficiency difference. Colder climates with higher heating bills see faster payback.
Do variable-speed furnaces save more?
Yes. Variable-speed blower motors run at lower speeds most of the time, using 30–50% less electricity than single-speed motors. They also provide more consistent temperatures and better humidity control.
Should I consider a heat pump instead?
In moderate climates (below 6,000 heating degree days), heat pumps can be 2–3x more efficient than gas furnaces. Dual fuel systems pair a heat pump with a gas furnace for the best of both worlds.
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