FURNACE INSTALLATION COSTS IN SAN FRANCISCO 2026
Furnace installation costs in San Francisco typically range from $3,500–$8,000 for standard gas furnace replacement, and $6,000–$12,000 for high-efficiency 96% AFUE systems. Key cost factors include furnace size (BTU capacity matched to your home's heat load), efficiency rating (80% vs 96% AFUE — higher efficiency costs more upfront but saves on gas bills), installation complexity (existing ductwork condition, flue venting requirements, gas line capacity), and permit and inspection fees. SF's DBI requires permits for all furnace replacements — our expeditor handles the entire process. We install all major brands including Carrier, Trane, Lennox, Rheem, and Bryant. Every installation includes a Manual J load calculation to ensure correct sizing.
As California accelerates its transition away from fossil fuels, many SF homeowners are choosing to convert from gas furnaces to all-electric heat pump systems rather than replacing a failing furnace with another gas unit. Heat pumps provide both heating and cooling, qualify for significant rebates, and position your home for California's clean energy future. The TECH Clean California program offers up to $4,500 for heat pump installations, federal IRA tax credits add up to $2,000, and PG&E offers additional rebates — making the all-electric switch financially compelling. SolidBay helps you evaluate both options and make the right choice for your specific home and budget.