In San Diego in 2026, a gas furnace runs $3,500-$6,000 installed and a heat pump runs $9,000-$16,000 before rebates. After SDG&E and federal rebates, the heat pump drops to $4,000-$9,000 net. Operating cost then favors the heat pump by $90-$160 a year. For most households here, the heat pump now wins. Here’s the full math with rebate stacks, efficiency numbers, and where each option still wins.
The fast answer
| Gas furnace | Heat pump | |
|---|---|---|
| Equipment cost installed | $3,500-$6,000 | $9,000-$16,000 |
| Available rebates | $0-$300 typically | $3,000-$8,000 typical |
| Net upfront cost | $3,200-$5,700 | $4,000-$9,000 |
| Annual operating cost (SD typical home) | $300-$500 gas | $250-$400 electric |
| 15-year operating cost | $4,500-$7,500 | $3,750-$6,000 |
| 15-year total cost of ownership | $7,700-$13,200 | $7,750-$15,000 |
The numbers are close. Where the heat pump pulls ahead: solar households (much higher savings), homes also replacing their AC (combined replacement captures more rebates and labor savings), and households qualifying for enhanced income-based rebates.
What’s actually included in each install
Gas furnace install ($3,500-$6,000):
- The furnace unit ($1,200-$2,500)
- Labor ($1,000-$1,800)
- Venting, gas line connection, electrical hookup ($400-$800)
- Removal of old furnace ($150-$300)
- Permit ($150-$300)
- Optional thermostat update ($150-$400)
Heat pump install ($9,000-$16,000):
- The outdoor unit ($2,500-$5,000)
- Indoor air handler / coil ($1,500-$3,500)
- Refrigerant line set ($200-$600)
- Electrical work, including new breaker and disconnect ($400-$1,500)
- Permit and inspection ($150-$400)
- Labor (2-3 day install) ($2,500-$5,500)
- Thermostat configured for heat pump ($200-$400)
- Old equipment removal ($150-$300)
The heat pump costs more because it’s a full system (cooling + heating) and includes refrigerant lines + indoor coil. A gas furnace alone doesn’t cool, you’d need separate AC.
Rebate landscape
Gas furnace rebates in 2026: minimal. SoCalGas occasionally offers $100-$300 for high-efficiency furnaces. Federal tax credits don’t apply to gas heating. Total typical rebate value: $0-$300.
Heat pump rebates in 2026:
- TECH Clean California (administered through SDG&E): $1,000-$6,000 (income-tiered)
- Federal 25C tax credit: up to $2,000
- SDG&E equipment rebate: $200-$500 for qualifying models
- Total typical: $3,000-$8,000
SDG&E points homeowners to several stackable electrification programs on its home electrification page. The ones that matter for heating swaps:
| Program | What it covers | Typical value |
|---|---|---|
| TECH Clean California | Heat pump HVAC, income-tiered | $1,000-$6,000 |
| The Switch Is On | Statewide clean-energy installs and contractor finder | Varies by measure |
| Golden State Rebates | Instant rebates on qualifying efficient equipment | $200-$500 |
| Comfortably CA | Contractor and distributor incentives passed to homeowners | Varies |
| Federal High-Efficiency Electric Home Rebate (IRA) | Whole-home electrification cap | Up to $14,000 |
| Federal 25C tax credit | Qualifying heat pump efficiency tiers | Up to $2,000 |
The federal $14,000 cap covers electrification and weatherization combined, so a single heat pump rarely uses all of it. Income limits apply to the largest tiers. Verify current amounts on SDG&E’s site before you sign a quote, since program funding cycles change.
This is the single biggest factor that’s shifted the heat pump math in 2024-2026. Five years ago heat pumps were $4,000-$6,000 more expensive net of rebates. Today they’re $500-$3,500 more expensive net of rebates for typical households, and they can be cheaper for income-qualified ones.
For the full rebate breakdown, see our 2026 heat pump rebate guide.
Operating cost in San Diego
The detail nobody talks about: heat pumps don’t just heat, they cool. So when you compare heat pump operating cost to gas furnace operating cost, you’re not comparing the right things. The honest comparison is:
Gas furnace + AC vs Heat pump alone.
Annual operating costs in a typical 1,800 sqft San Diego home:
| Gas furnace + AC | Heat pump alone | |
|---|---|---|
| Cooling (4-5 months) | $400-$600 | $360-$540 |
| Heating (3-4 months) | $300-$500 (gas) | $250-$400 (electric) |
| Annual total | $700-$1,100 | $610-$940 |
The heat pump saves $90-$160/year on operating cost, primarily because:
- Cooling efficiency is slightly higher (modern inverter-driven systems)
- Electric heating at 300% efficiency beats gas heating at 90% efficiency on cost per BTU in San Diego’s mild climate
Over 15 years, that’s $1,350-$2,400 in operating savings. The savings roughly cover the upfront price difference.
Efficiency numbers, side by side
The reason the operating cost flips is efficiency. A gas furnace burns fuel and tops out near 96% AFUE, meaning it never returns more heat than the energy it consumes. A heat pump moves heat instead of making it, so it returns two to three times the energy it draws.
| Spec | Gas furnace | Heat pump |
|---|---|---|
| Heating efficiency | 80-96% AFUE | 250-350% (COP 2.5-3.5) |
| Cooling efficiency | None (needs separate AC) | 15-22 SEER2 |
| Heat output feel | Hotter air, drier | Gentler warmth, holds humidity |
| Fuel source | Natural gas (SoCalGas) | Electricity (SDG&E) |
| Performs in SD winter | Yes | Yes, easily to its rated low temp |
| Cuts heating carbon | No | 38-53% lower per UC Davis research |
The COP figure is why electric heat beats gas on cost per BTU here. In a colder state a heat pump loses efficiency in deep freezes. San Diego rarely drops below 38F outside the mountains, so the system runs in its efficient range nearly year-round. That’s the local edge a national comparison misses.
Where heat pumps win bigger
Three situations where the math tilts further toward heat pumps:
1. Solar households (NEM 3.0). Solar electricity exported to SDG&E is now worth much less than it used to be. Using your daytime solar production for your own heating and cooling load, exactly what a heat pump does, captures the value the grid no longer pays for. Solar households can see annual operating savings of $400-$800 vs gas + AC.
2. Replacing both AC and furnace at once. If both are end-of-life, combined replacement with a heat pump saves 15-25% on labor versus two separate jobs. The rebate stack also applies to the full project. Total cost difference vs separate AC + furnace replacement: often $1,000-$3,000 in favor of heat pump.
3. Income-qualified households. SDG&E TECH Clean California rebates scale with income. Households under 80% AMI can get $2,000-$4,500. Under 60% AMI can get $4,000-$6,000. At those rebate levels, heat pumps are often cheaper out-of-pocket than gas furnace + separate AC.
Where gas still wins
Two situations:
1. You only need to replace the furnace, AC is fine. Replacing just the furnace as a gas unit costs $3,500-$6,000. Converting to a heat pump means also replacing the AC (which works fine) and possibly the ductwork. The economics for replacing equipment that has life left rarely work.
2. Electrical panel can’t handle heat pump load. Heat pumps draw more electricity than gas furnaces. If your panel is at capacity, panel upgrades add $1,500-$4,000. This can flip the cost comparison back toward gas for borderline situations.
What about home value impact
Both heat pumps and gas furnaces add roughly equivalent value to a home at sale ($3,000-$5,000 of perceived value for a new system, regardless of fuel type). The exception: in California specifically, heat pump homes are starting to command slight premiums ($1,000-$3,000) as buyers become more aware of operating cost differences and California’s clean-energy regulatory direction.
15-20 years from now, gas hookups in California residential are likely to be phased out for new construction and harder to maintain in existing homes. Long-term resale value may favor heat pumps more strongly as that timeline approaches.
The combined decision: heat pump or gas furnace + AC
For most San Diego homeowners in 2026 facing a heating system replacement, the right question isn’t “gas vs heat pump.” It’s:
- If your AC is also failing: replace both as a heat pump (best math)
- If your AC has 5+ years left: dual-fuel (heat pump for cooling + most heating, existing furnace for backup)
- If you only need furnace replacement and AC is fine: gas furnace (don’t overextend the scope)
For background on HVAC systems generally, see our what is HVAC homeowner guide. For business owners weighing commercial HVAC options, see our commercial HVAC for small businesses in San Diego guide. For more on the AC replacement angle, see our replacing AC with heat pump in San Diego guide.
FAQs
Is a heat pump cheaper than a gas furnace in San Diego?
Before rebates: no, heat pump costs $3,000-$6,000 more. After SDG&E and federal rebates: gap shrinks to $500-$3,500 for typical households. For income-qualified households, heat pump is often cheaper net of rebates.
How much does a gas furnace cost installed in San Diego?
$3,500-$6,000 installed. Equipment, labor, venting, electrical, permit, and removal. Higher-efficiency or high-output models run toward the top of the range.
What’s cheaper to run, a heat pump or a gas furnace?
In San Diego, heat pumps cost slightly less annually ($90-$160 savings). The difference is bigger for solar-equipped homes where heat pumps can use free daytime electricity.
Will a heat pump work in San Diego winters?
Easily. San Diego rarely sees below 38F outside the mountains. Heat pumps are rated efficient down to 5F. The system operates in its comfort zone year-round here.
How long does a gas furnace last vs a heat pump?
Gas furnaces: 15-25 years with normal maintenance. Heat pumps: 12-18 years in San Diego (coastal 10-13, inland 14-18). Heat pumps see shorter average lifespans because the compressor runs year-round vs only in cooling season.
What’s the federal tax credit for heat pumps?
25C tax credit: up to $2,000 per year for qualifying heat pumps that meet specific efficiency standards. Non-refundable credit (reduces tax liability, doesn’t create a refund). Gas furnaces don’t qualify.
Which SDG&E rebates apply to a heat pump in San Diego?
TECH Clean California, administered through SDG&E, pays $1,000-$6,000 income-tiered. SDG&E equipment rebates add $200-$500. Statewide programs like The Switch Is On, Golden State Rebates, and Comfortably CA stack on top, and the federal High-Efficiency Electric Home Rebate caps whole-home electrification at $14,000. Verify current amounts on SDG&E’s home electrification page before signing a quote.
Are heat pumps loud compared to gas furnaces?
Outdoor unit similar to AC condenser noise (50-65 decibels at full load). Indoor air handler quieter than most gas furnaces (no combustion noise). Modern inverter-driven heat pumps run quieter at partial loads, which is most of the time.
Should I replace my old gas furnace with a heat pump?
For most San Diego homes with aging or failing AC, yes. For homes where only the furnace is failing and AC is fine, gas furnace replacement is usually the right scope. Get both quotes and compare with full rebate math.
When to call us
If you’re trying to decide between heat pump and gas furnace replacement for your specific situation, we’ll quote both options with itemized pricing and rebate math. Call (442) 777-6440 for a free in-home assessment.