Calculator
Heat Pump vs. Furnace in San Francisco, CA
Data last updated: July 25, 2026
Ad — 728×90 / 320×100
Cost Comparison for San Francisco, CA
Ad — Responsive
Recommendation for San Francisco, CA
Heat pumps are strongly recommended in San Francisco, CA. The high cooling demand (300 CDD) and moderate heating needs make heat pumps the most cost-effective option.
Climate Context
| Climate Zone | Mediterranean |
| Average Temperature | 58.0°F |
| Winter Low (typical) | 42°F |
| Summer High (typical) | 72°F |
| Heating Degree Days | 2500 |
| Cooling Degree Days | 300 |
| Median Home Age | 83 years (built ~1943) |
Ad — 728×90 / 320×100