What is the Price Difference between 80% and 96% Afue Furnaces?

When comparing furnace options for your San Francisco home, the primary difference lies in the upfront investment versus long-term utility savings. An 80% AFUE furnace typically costs between $2,500 and $4,000 to install, while a high-efficiency 96% AFUE furnace generally ranges from $4,500 to $7,500.

While the 96% AFUE model requires a higher initial outlay, it offers several financial advantages that often bridge the price gap within 3 to 5 years:

• Monthly Utility Savings: A 96% AFUE unit can cut your annual heating expenses by roughly half compared to an 80% model. In the Bay Area, this typically translates to $250–$400 in annual savings on your PG&E bill.
• Federal Tax Credits: Under current 2026 incentives, high-efficiency furnaces (96% AFUE or higher) may qualify for a federal tax credit of up to $2,000. Standard 80% AFUE models are not eligible for this credit.
• Equipment Lifespan: High-efficiency models often feature a longer typical lifespan of 20–25 years, compared to the 15–20 years expected from standard units.

Beyond the unit itself, we also consider additional factors such as permit fees (typically $200–$600 in San Francisco), potential ductwork modifications, and local Zero-NOx emission regulations, which apply to all new installations in our area.

• High Efficiency Furnace Installation Cost: 2026 Guide