Heat Pump vs Furnace (2026): Which Costs Less to Run?

Heat pumps are revolutionizing home heating and cooling. They're 3x more efficient than gas furnaces and pair perfectly with solar panels. Here's how they compare.

What Is a Heat Pump?

A heat pump is a single system that provides both heating and cooling. Unlike a furnace that burns fuel to create heat, a heat pump moves heat from outside to inside (heating mode) or inside to outside (cooling mode).

Because it moves heat rather than generating it, a heat pump delivers 2–4 units of heat for every unit of electricity consumed.

Efficiency Comparison

Gas Furnace

• Efficiency: 80–98% AFUE (1 unit of gas = 0.8–0.98 units of heat)
• Fuel: Natural gas, propane, or oil
• Lifespan: 15–20 years
• Annual cost (avg): $600–$1,200 depending on gas prices

Electric Heat Pump

• Efficiency: 200–400% COP (1 unit of electricity = 2–4 units of heat)
• Fuel: Electricity (can be powered by solar!)
• Lifespan: 15–20 years
• Annual cost (avg): $400–$800 depending on electricity rates

Cost Comparison

Upfront Costs

• Furnace replacement: $3,000–$6,000
• Heat pump installation: $5,000–$12,000 (includes outdoor + indoor unit)
• Heat pump (mini-split): $3,000–$8,000

Operating Costs (Annual)

• Gas furnace: $600–$1,200/year (depends on gas prices)
• Heat pump: $400–$800/year (depends on electricity rate)
• Heat pump + solar: $0–$200/year (after solar offset)

10-Year Total Cost

• Furnace: $3,000 install + $9,000 fuel = $12,000
• Heat pump alone: $6,000 install + $6,000 electricity = $12,000
• Heat pump + solar: $15,000 install + $1,000 electricity = $16,000 (but solar also powers the rest of your home)

Heat Pump + Solar = Maximum Savings

The biggest advantage of a heat pump is that it runs on electricity — which solar panels produce. Here's the combination:

1. Solar panels generate free electricity during the day
2. Heat pump uses that electricity for heating and cooling
3. Battery storage stores excess solar for nighttime heating

This setup can reduce your heating and cooling costs by 80–100%.

When a Heat Pump Makes Sense

Switch to a heat pump if:

• Your furnace is 15+ years old and needs replacement
• You have solar panels (or plan to install them)
• Your electricity rate is below $0.20/kWh
• You want to eliminate fossil fuels
• You live in a mild or moderate climate (heat pumps work in cold climates too, but cost more)

Keep your furnace if:

• Your furnace is less than 10 years old and working well
• Your gas rate is very low (< $1.00/therm)
• Your electricity rate is very high (> $0.25/kWh) and you don't have solar
• You live in an extremely cold climate (below -10°F regularly)

Cold Climate Heat Pumps

Modern cold-climate heat pumps work efficiently down to -13°F (-25°C). If you live in a cold region, look for:

• HSPF rating of 10+ (heating efficiency)
• Inverter-driven compressor for cold weather performance
• Hyper-heat or cold-climate models from Mitsubishi, Daikin, or LG

Calculate Your Savings

Use our Home Energy Cost Calculator to compare heating costs for different fuel types. Then run our free AI Home Energy Advisor to see if a heat pump + solar combination makes sense for your home.

The bottom line: if you're replacing an old furnace or planning to go solar, a heat pump is almost always the smarter long-term investment.