Propane vs Electric Heat: Including Heat Pumps
This is not a simple two-way comparison. There are three contenders: propane furnaces, electric resistance heating, and heat pumps. The winner depends on your climate zone and local energy prices.
Propane Furnace
$2,430/yr
90-98% AFUE
Electric Resistance
$3,750/yr
100% efficiency
Heat Pump
$1,250/yr
200-400% COP
Three-Way Comparison Table
| Factor | Propane | Electric Resistance | Heat Pump |
|---|---|---|---|
| Annual heating cost (2,000 sq ft) | $2,430 | $3,750 | $1,250 |
| Cost per 100,000 BTU | $3.04 | $2.93 | $0.98 |
| System efficiency | 90-98% AFUE | 100% (resistance) | 200-400% COP |
| System cost (installed) | $4,000 - $7,500 | $1,500 - $3,000 | $4,000 - $8,000 |
| Lifespan | 20-25 years | 15-25 years | 15-20 years |
| Annual maintenance | $150 - $250 | $50 - $100 | $100 - $200 |
| Works below 0F | Yes - full output | Yes - full output | Reduced - COP 1.5 |
| Cooling capability | No (separate AC needed) | No (separate AC needed) | Yes - built in |
| Carbon footprint | Moderate (fossil fuel) | Varies by grid mix | Lowest (electric + efficiency) |
| Power outage operation | Yes (with ignition power) | No | No |
Heat Pump Deep Dive: When They Beat Propane
Heat pumps are not space heaters - they move heat from outside air into your home, achieving 200-400% efficiency. But their performance depends heavily on outdoor temperature.
How COP Changes with Temperature
| Outdoor Temp | Heat Pump COP | Cost per 100k BTU | Propane Cost per 100k BTU | Winner |
|---|---|---|---|---|
| 47F (8C) | 3.5 | $0.84 | $3.04 | Heat Pump |
| 35F (2C) | 2.8 | $1.05 | $3.04 | Heat Pump |
| 25F (-4C) | 2.2 | $1.33 | $3.04 | Heat Pump |
| 17F (-8C) | 1.8 | $1.63 | $3.04 | Heat Pump (barely) |
| 5F (-15C) | 1.5 | $1.96 | $3.04 | Propane |
| -5F (-21C) | 1.2 | $2.44 | $3.04 | Propane |
COP values for modern cold-climate heat pumps. Electricity rate: $0.14/kWh. The crossover point where propane becomes cheaper is typically around 5-15F depending on local electricity rates.
Best Choice by Climate Zone
Cold Climate (Zones 3-4)
Winner: Propane or Dual-FuelMinnesota, Wisconsin, Maine, Vermont, Montana, North Dakota
Temperatures regularly drop below 0F. Heat pump COP falls to 1.5 or lower, making it barely more efficient than resistance heat. A propane furnace maintains full output regardless of temperature. The optimal setup is a dual-fuel system: heat pump handles 60-70% of heating hours (above 30F) while propane covers the coldest 30-40%. This combination typically saves 25-35% versus propane alone and ensures reliable heat in any conditions.
Propane
$2,800 - $3,500
Electric Resistance
$4,200 - $5,500
Heat Pump Only
$1,600 - $2,200
Dual-Fuel (HP+Propane)
$1,400 - $1,800
Moderate Climate (Zones 5-6)
Winner: Heat PumpOhio, Pennsylvania, Colorado, Oregon, Virginia, North Carolina
Winters are cold but temperatures rarely stay below 15F for extended periods. Heat pumps maintain COP of 2.0-3.0 for most of the heating season, making them the clear cost winner. A cold-climate heat pump handles 80-90% of heating needs efficiently. A propane furnace backup is still worthwhile for the handful of very cold days, but the heat pump does most of the work. Standalone propane is viable but costs 40-60% more annually than a heat pump.
Propane
$2,200 - $2,800
Electric Resistance
$3,400 - $4,200
Heat Pump Only
$1,000 - $1,500
Dual-Fuel (HP+Propane)
$900 - $1,200
Mild Climate (Zones 7-10)
Winner: Heat PumpFlorida, Texas, California, Arizona, Georgia, South Carolina
Mild winters mean the heat pump operates at peak efficiency (COP 3.0-4.0) for virtually the entire heating season. Propane heating is significantly more expensive and unnecessary in these climates. A heat pump provides both heating and cooling from a single system, making it the clear winner on both cost and convenience. The only scenario for propane in mild climates is as a backup generator fuel or for cooking.
Propane
$1,200 - $1,800
Electric Resistance
$1,800 - $2,600
Heat Pump Only
$500 - $800
Dual-Fuel (HP+Propane)
Not needed
Appliance-by-Appliance Comparison
Annual operating cost for common home appliances - propane vs electric vs heat pump versions.
| Appliance | Propane/yr | Electric/yr | Heat Pump/yr |
|---|---|---|---|
| Water heater | $250 - $350 | $400 - $550 | $150 - $250 |
| Clothes dryer | $50 - $70 | $75 - $100 | $30 - $50 |
| Cooking range | $40 - $60 | $50 - $80 | N/A |
| Fireplace | $300 - $500 | $200 - $350 | N/A |
The Hybrid Approach: Heat Pump + Propane
The fastest-growing heating configuration in the US combines a heat pump with a propane furnace backup. Here is why it works and what it costs.
A dual-fuel system uses the heat pump as the primary heating source during mild to moderate weather (above 25-35F, depending on the model). When outdoor temperatures drop below the balance point, the system automatically switches to the propane furnace for maximum heating output and efficiency. The switchover temperature is configurable.
The economics are compelling: in a moderate climate, the heat pump handles 70-85% of annual heating hours at 200-350% efficiency. The propane furnace covers the remaining 15-30% at 90-98% efficiency. The blended annual cost is typically 30-50% less than propane alone. A dual-fuel system also provides air conditioning from the heat pump in summer at no additional equipment cost.
Installation cost for a complete dual-fuel system ranges from $8,000 to $15,000 depending on equipment quality and home size. Federal tax credits of up to $2,000 for qualifying heat pumps reduce the effective cost. The payback period versus propane-only heating is typically 4-7 years, after which you enjoy ongoing savings of $500-1,500 per year.
Frequently Asked Questions
Is it cheaper to heat with propane or electricity?
It depends on the type of electric heating. Propane is cheaper than electric resistance heating (baseboard heaters, space heaters) in most markets, costing about $2,430/year versus $3,750/year for a 2,000 sq ft home. However, modern heat pumps are significantly cheaper than both, at approximately $1,250/year in moderate climates. In very cold climates below 30F, heat pump efficiency drops and propane can be more cost-effective. The answer depends on your climate zone, local electricity rates, and whether you are comparing against resistance heat or a heat pump.
Should I switch from propane to a heat pump?
If you live in a mild to moderate climate (USDA zones 6-10, where temperatures rarely drop below 20F), switching to a heat pump can save $1,000-1,500 per year on heating costs. A cold-climate heat pump costs $4,000-8,000 installed. The payback period is typically 3-6 years. In very cold climates (zones 3-5), a dual-fuel system - heat pump for mild weather plus propane furnace for extreme cold - is often the best approach. This hybrid setup can save 30-40% on annual heating costs while ensuring reliable heat in any temperature.
Are heat pumps better than propane in cold weather?
Modern cold-climate heat pumps can operate effectively down to -15F, but their efficiency decreases as temperature drops. At 47F, a heat pump has a COP of 3.0-4.0 (300-400% efficient). At 17F, COP drops to 2.0-2.5. At 0F, COP may drop to 1.5-1.8. A propane furnace maintains 90-98% efficiency regardless of outdoor temperature. Below about 25-30F, propane typically becomes cheaper per BTU of delivered heat. This is why dual-fuel systems are increasingly popular in cold climates - the heat pump handles the majority of heating hours while propane covers the coldest days.
How much does it cost to heat a house with propane vs electric per month?
For a typical 2,000 sq ft home during the heating season: propane costs $300-450/month, electric resistance costs $450-650/month, and a heat pump costs $100-200/month in moderate climates. These figures vary significantly by climate zone and local energy prices. In the coldest months (January-February), propane costs can spike to $500+ and electric resistance to $700+. Heat pump costs in cold climates may reach $250-350/month during peak winter as efficiency drops. Summer months see propane costs drop to near zero for heating, while heat pump costs are minimal.
Is a propane water heater cheaper to run than electric?
A standard propane water heater costs about $250-350 per year to operate, compared to $400-550 for a standard electric water heater. Propane water heaters also heat water faster (40+ gallons per hour recovery versus 20-25 for electric). However, a heat pump water heater costs only $150-250 per year and qualifies for federal tax credits. For new installations, a heat pump water heater is usually the best value. For homes already plumbed for propane, a propane water heater offers good performance at reasonable cost.