Heat Pump vs Furnace Cost Calculator

About the Heat Pump vs Furnace Cost Calculator

Choosing between a heat pump and a gas furnace is one of the biggest HVAC decisions homeowners face. Heat pumps use electricity to move heat from outside air into your home, achieving 200–400% efficiency (COP 2–4). Gas furnaces burn natural gas at 80–96% efficiency.

The cost comparison depends on local electricity and gas prices, climate severity, and equipment efficiency. In mild to moderate climates, heat pumps are often cheaper to operate. In very cold climates with cheap natural gas, furnaces may have an edge — though modern cold-climate heat pumps are closing that gap.

This calculator compares the annual heating costs of both systems based on your specific prices, climate, and equipment specs. It helps you make an informed decision for new construction or when replacing an aging system.

This analytical approach supports both immediate cost reduction and long-term sustainability goals, helping organizations balance economic and environmental priorities in their energy management.

When This Page Helps

Energy prices vary dramatically by region. This calculator uses your specific electricity and gas rates to give an accurate cost comparison rather than relying on national averages that may not reflect your situation. Having accurate metrics readily available streamlines utility bill analysis, budget forecasting, and investment planning for energy efficiency projects and renewable energy installations.

How to Use the Inputs

1. Enter your annual heating load in BTU.
2. Enter the heat pump COP or HSPF rating.
3. Enter the furnace AFUE percentage.
4. Enter your electricity rate per kWh.
5. Enter your natural gas rate per therm.
6. Compare annual heating costs for both systems.

Example Calculation

Tips & Best Practices

• Heat pumps also provide air conditioning — factor in AC replacement savings.
• Electricity rates vary by time of day; use your average blended rate.
• Cold-climate heat pumps (COP 2.5+ at 5°F) change the math in cold regions.
• Consider the IRA heat pump tax credit (up to $2,000) when comparing upfront costs.
• Gas prices are volatile; electricity prices are more stable long-term.
• In regions with clean electricity, heat pumps reduce carbon emissions significantly.

The Energy Price Factor

The heat pump vs furnace decision comes down to the ratio of electricity to gas prices. At the national average of $0.13/kWh and $1.20/therm, a COP 3.0 heat pump costs about the same as a 96% AFUE furnace. But regional variation is enormous — electricity in the Northwest is $0.08/kWh while the Northeast hits $0.22/kWh.

Beyond Operating Cost

Heat pumps provide both heating and cooling, eliminating the need for a separate AC. The federal Inflation Reduction Act offers up to $2,000 in tax credits for heat pump installation. Heat pumps produce no on-site emissions, important for climate goals and indoor air quality.

The Future Trend

Electrification of heating is accelerating due to climate policy, improving heat pump technology, and rising gas prices. Cold-climate heat pumps now perform well in nearly all US climates. Many states offer additional incentives beyond federal credits. The economics increasingly favor heat pumps as the technology improves.

Frequently Asked Questions

• Is a heat pump cheaper than gas?

  It depends on local prices. When electricity is under $0.12/kWh and gas is over $1.50/therm, heat pumps are usually cheaper. At $0.15+/kWh with gas under $1.00/therm, gas is often cheaper. This calculator uses your exact rates.

• What is the break-even electricity rate?

  The break-even point is: electricity rate = gas rate × COP × 3.412 / (AFUE × 100,000 / 100). At $1.20/therm gas, 96% AFUE, and COP 3.0: break-even = ~$0.125/kWh. Below this rate, heat pumps win.

• Can a heat pump heat my home in very cold weather?

  Modern cold-climate heat pumps work efficiently down to -15°F or colder. Models from Mitsubishi, Fujitsu, and Daikin maintain 75–80% of rated capacity at 5°F. For most of the US, a heat pump alone can serve as primary heating.

• What about a dual-fuel system?

  Dual-fuel pairs a heat pump with a gas furnace. The heat pump heats whenever COP makes it cheaper than gas, and the furnace takes over during extreme cold. This optimizes cost but adds equipment complexity and maintenance.

• Do heat pumps work in humid climates?

  Yes, and they provide excellent dehumidification during cooling mode. In heating mode, humidity isn't a concern. Heat pumps are increasingly popular in the Southeast US where they provide both efficient heating and superior cooling.

• What about heat pump maintenance costs?

  Heat pump maintenance costs are similar to AC maintenance ($100–$200/year for a tune-up). Gas furnaces also need annual service. Heat pumps eliminate the risk of carbon monoxide from combustion appliances, which is a safety benefit.