Heat Pump vs Gas Furnace: Which Saves You More?

Operating cost, install cost, comfort, and 10-year economics compared for typical US homes.

The heat pump vs gas furnace decision is no longer obvious. Modern cold-climate heat pumps work down to -25°C with COP above 2.0, and the Inflation Reduction Act provides $2,000+ in rebates. In many US states, heat pumps now beat gas on both operating cost and total cost of ownership. But not everywhere — the answer depends on your local electricity rate, gas rate, and climate.

At a glance

RECOMMENDED

Cold-Climate Heat Pump

Mitsubishi Hyper-Heat or Daikin Aurora class
$12,000
Installed cost (IRA rebate expired Dec 2025)
Heating COP (47°F)
3.5–4.0
Heating COP (5°F)
2.0–2.5
HSPF2 rating
10–12
Cold weather limit
-25°C (-13°F)
Cooling included
Yes (replaces AC)
Lifespan
15–20 years
Annual operating cost
$600–$1,400
OPTION

High-Efficiency Gas Furnace

95–98% AFUE condensing furnace
$6,500
Installed (furnace only; AC separate adds $4,000)
AFUE rating
95–98%
Heat source
Natural gas combustion
Cold weather performance
100% output at any temp
Cooling included
No (needs separate AC)
Lifespan
15–20 years
Annual operating cost
$800–$1,800 (varies with gas prices)

Full specification comparison

SpecCold-Climate Heat PumpHigh-Efficiency Gas Furnace
Heating COP (47°F)3.5–4.0—
Heating COP (5°F)2.0–2.5—
HSPF2 rating10–12—
Cold weather limit-25°C (-13°F)—
Cooling includedYes (replaces AC)No (needs separate AC)
Lifespan15–20 years15–20 years
Annual operating cost$600–$1,400$800–$1,800 (varies with gas prices)
AFUE rating—95–98%
Heat source—Natural gas combustion
Cold weather performance—100% output at any temp

Pros and cons

Cold-Climate Heat Pump

Pros

  • Provides both heating AND cooling in one system
  • COP 3.0+ means 3× more heat than electricity consumed
  • State rebates may still apply (federal IRA credit expired Dec 2025)
  • No combustion — no carbon monoxide risk
  • Works with smart thermostats and ducted or ductless
  • Eliminates gas line requirement (in all-electric homes)

Cons

  • Higher upfront cost than furnace replacement
  • Backup heat strips may activate below -20°C, increasing cost
  • Requires proper sizing — oversizing causes short cycling
  • Some cold-climate models have higher maintenance costs

High-Efficiency Gas Furnace

Pros

  • Lower upfront cost (especially if no AC needed)
  • 100% heating capacity regardless of outdoor temperature
  • Familiar technology — every HVAC tech can service it
  • Works during power outages with minimal generator backup
  • Gas prices historically more stable than electricity

Cons

  • Combustion produces CO₂ and requires venting
  • Carbon monoxide risk (low but real)
  • Requires gas line to home
  • Doesn't provide cooling — AC needed separately
  • No federal rebates available
  • Efficiency capped at 98% (vs heat pump's 300%+)
The verdict

For most US homeowners replacing both furnace and AC, a cold-climate heat pump is now the better financial choice. State rebates (where available) plus state incentives often brings net cost below a furnace+AC combo, and operating savings of $200–$600/year compound over 15+ years. Exception: if you have cheap gas ($1.00/therm or less) and expensive electricity ($0.25+/kWh), gas still wins on operating cost. Run the Heat Pump Payback Calculator with your actual rates.

The COP advantage

A heat pump with COP 3.0 delivers 3 kWh of heat for every 1 kWh of electricity. A 98% AFUE gas furnace delivers 0.98 kWh of heat per kWh of gas. The heat pump is effectively 3× more efficient at converting energy to heat. Whether that translates to lower operating cost depends entirely on the relative prices of electricity and gas.

When gas still wins

Massachusetts: $0.32/kWh electricity, $1.50/therm gas. Heat pump COP 3.0 delivers heat at $0.107/kWh. Gas at 95% AFUE delivers at $0.055/kWh. Gas wins by 2×. Even with state rebates, payback exceeds 15 years.

When heat pump wins

Pacific Northwest: $0.11/kWh hydro electricity, $1.40/therm gas. Heat pump delivers heat at $0.037/kWh. Gas at 95% delivers at $0.051/kWh. Heat pump wins on operating cost. Payback under 5 years.

Don't scrap a working furnace

If your furnace has 5+ years of life left, the operating savings rarely justify early replacement. Wait until it needs replacement, then switch to a heat pump. The exception: switching from oil or propane, where operating savings are large enough to justify immediate change.

Run the numbers for your situation

Use the matching calculator with your actual usage and rates.

Run the Heat Pump Payback Calculator