I’ve owned three homes - in Buffalo NY (oil boiler), Atlanta GA (heat pump), and Portland OR (natural gas). The cost differences are dramatic. Here’s the real cost comparison and what determines which system fits where.
Cost Per BTU Comparison (2026 averages)
| Fuel Type | Notes |
|---|---|
| Natural Gas | Region varies |
| Heat Pump (electric) | Climate-dependent |
| Propane | Liquid fuel premium |
| Heating Oil | Tank delivery |
| Electric Resistance | Highest cost |
| Wood (purchased) | Labor-intensive |
| Wood (free) | Time, no cash cost |
Annual Operating Costs (Typical 2,000 sq ft home)
These are real-world annual heating costs by climate zone:
Mild Climate (Zone 3 - Atlanta, Phoenix, Houston):
- Heat Pump:
- Natural Gas:
- Electric Resistance:
- Propane:
Moderate Climate (Zone 5 - Chicago, Boston):
- Natural Gas:
- Heat Pump (cold climate):
- Oil:
- Propane:
- Electric Resistance:
Cold Climate (Zone 7 - Minneapolis, Buffalo):
- Natural Gas:
- Oil:
- Propane:
- Cold-climate Heat Pump:
- Electric Resistance:
Installation Costs (2026)
- Natural gas furnace: installed
- Standard heat pump: installed
- Cold-climate heat pump: installed
- Oil boiler: installed
- Propane furnace: installed (pluscurrent pricing tank)
- Electric furnace: installed
- Geothermal: installed
- Wood stove: installed
- Solar + heat pump: installed (pre-incentive)
Federal incentives in 2026:
- Heat pumps: 30% federal tax credit up tocurrent pricing
- Geothermal: 30% federal tax credit, uncapped
- Solar: 30% federal tax credit, uncapped
- State incentives vary widely
Climate-Specific Recommendations
Sun Belt (Atlanta, Phoenix, Florida): Heat pump is the clear winner. Mild winters mean heat pumps run efficiently year-round. Cooling capability is bonus.
Pacific Northwest (Portland, Seattle): Heat pump excellent. Natural gas slightly cheaper to run but loses on installation cost considering cooling. Heat pump + small gas backup for cold snaps is the premium choice.
Northeast (Boston, NYC): Natural gas if available is most cost-effective. Cold climate heat pumps work but $$. Oil boilers still common but expensive to run. New construction: heat pump + gas furnace dual-fuel.
Upper Midwest (Minneapolis, Chicago): Natural gas leads on operating cost. Geothermal best for permanent homeowners. Cold-climate heat pumps viable with proper sizing. Electric resistance only as last resort.
Mountain West (Denver, Salt Lake): Natural gas where available. Otherwise heat pump + small backup. Solar offsets electric load well.
When to Replace
Heating systems last 15-25 years for forced-air furnaces. Boilers last 20-30 years. Heat pumps 10-15 years.
Signs to replace:
- Multiple repair calls per year ( each)
- 15+ years old with reduced efficiency
- Major component failure (heat exchanger crack, compressor)
- Inability to heat house adequately on cold days
- Strange smells, sounds, or behavior
Replacing before failure on your schedule is cheaper than emergency replacement in winter ( emergency premium).
My Cost History
Buffalo NY (2010-2015): Oil boiler, 2,400 sq ft.
- Annual oil: (depending on prices)
- Service contracts:
- Total:
- Hot water heating separate: gas,
Atlanta GA (2015-2020): Heat pump, 2,200 sq ft.
- Annual electric (heating portion):
- Service: for tune-up
- Total:
Portland OR (2020-present): Natural gas furnace, 1,800 sq ft.
- Annual gas:
- Service:
- Total:
Heat pump in Atlanta was 80% cheaper to operate than oil in Buffalo. Climate dictates winner.
Hybrid Systems Worth Considering
Dual-fuel (heat pump + gas furnace): Heat pump for mild temperatures (40F+), gas furnace below. Best of both worlds. Premium installation cost but optimized operating cost.
Heat pump + solar: Solar offsets the electric draw of heat pump. Effectively free heating after solar payback. Best long-term economics in moderate climates.
Geothermal + solar: Most efficient combination butcurrent pricing installed. Payback 10-15 years. For permanent homes with environmental priorities.
Decision Framework
- What fuel sources are available at your address? (Natural gas requires gas line.)
- What’s the climate zone? (Determines viable heat pump options.)
- How long will you own the home? (Long-term homeowners can amortize higher upfront costs.)
- What’s your current cooling situation? (Heat pumps include cooling; furnaces don’t.)
- Solar capability? (South-facing roof + heat pump is excellent combination.)
For typical homeowners:
- Mild climate + cooling needed: Heat pump
- Moderate climate + gas available: Natural gas furnace with AC
- Cold climate + permanent home: Geothermal or gas + cold-climate heat pump dual-fuel
- Rural cold climate (no gas): Cold-climate heat pump with propane backup
Frequently asked questions
Which heating system is cheapest to run?+
Depends on climate and local utility rates. Heat pumps win in mild climates (above 30F average winter). Natural gas wins in cold climates with cheap gas. Oil and propane are usually most expensive. Electric resistance is most expensive unless solar offset.
Heat pump cold weather performance?+
Standard heat pumps lose efficiency below 30F. Cold-climate heat pumps (Mitsubishi Hyper-Heat, Bosch IDS) work effectively down to -15F. Climate matters - sub-zero climates need different equipment than mild winters.
What about geothermal?+
Most efficient but expensive upfront ( installed). Pays back in 8-15 years for high-use households. Not viable for renters or short-term residents. Best for permanent homeowners committed to property for 15+ years.
Wood stoves still viable?+
Yes for users with free or cheap wood and willingness to load and maintain. Heat output 30,000-90,000 BTU. Savescurrent pricing vs gas/electric. Trade-off: ash, smoke, manual loading, fire risk.
Solar + heat pump combination?+
Best long-term economics in moderate climates. Solar offsets the electricity heat pumps consume. Effectively free heating with right system. Solar installationcurrent pricing before incentives. Payback 8-15 years.