Choose around your house and both seasons
- A heat pump gives you heating and cooling. A furnace makes heat and needs separate air conditioning.
- Start with your available fuels, winter climate and recent utility bills. Neither system has the lowest running cost in every home.
- For harsh winters, compare a cold-climate heat pump, a furnace and a dual-fuel combination before choosing.
If you're replacing heating equipment, your summer cooling needs belong in the same decision. We'd compare the complete heating-and-cooling options first, because a furnace-only price leaves out a job that a heat pump already handles.
Your shortlist should reflect what the house can use and what you want from it. Available energy sources, insulation, existing ducts and local weather all matter, along with installation cost and the efficiency of the equipment you're considering.
What you're buying beyond warm air
An air-source heat pump uses electricity and refrigerant to move heat from outdoor air into your home, even when it feels cold outside. In summer, it reverses that process to provide cooling.
A fuel-burning furnace creates heat using natural gas, propane or oil, then distributes warmed air through ducts and vents. An electric furnace creates heat with resistance elements, so choosing electric heating still leaves you with two different technologies to compare.
| Option | Winter heating | Summer cooling |
|---|---|---|
| Air-source heat pump | Moves heat indoors using electricity and refrigerant | Reverses operation to cool |
| Fuel-burning furnace | Creates heat by burning gas, propane or oil | Needs separate air conditioning |
| Electric furnace | Creates heat with electric resistance | Needs separate air conditioning |
The heat can feel different, too. Furnaces deliver hotter air, while heat pumps tend to deliver lower-temperature air through longer, gentler cycles that help maintain steady comfort. If you're used to short bursts of hot furnace air, include that comfort preference in your comparison.
Your fuel supply and ducts narrow the options
Note whether natural gas is available and whether your house already has ducts. A gas furnace is a strong candidate when you have gas service and need dependable heat through prolonged cold spells.
Without ducts, include ductless mini-split heat pumps in your shortlist. They're air-source systems that can serve homes without ductwork or condition particular areas. Existing ducts and home insulation still deserve attention when you're comparing whole-home options.
Without gas service, an electric furnace can be practical, especially where electricity costs are relatively low. Its resistance heating generally uses more electricity for the same heat output than a heat pump, and electric furnaces are often paired with air-source heat pumps to improve overall efficiency.
If you currently use oil, include fuel storage and deliveries in your ownership comparison. An oil furnace can provide reliable cold-weather heat, while a cold-climate heat pump or dual-fuel arrangement gives you another option to evaluate when replacement comes around.
Better insulation and air sealing make a home easier to electrify. Bring those details into the discussion alongside fuel availability, because your home's heating demand helps determine which equipment fits.
Cold-weather output matters more than a minimum temperature
Mild winters suit heat pumps well. Through prolonged freezing weather, a furnace can offer consistent, high-output heating, while an air-source heat pump can lose heating output and efficiency as conditions become extremely cold. Supplemental heat may be needed, adding to energy use.
Lennox describes heat pumps as a smart option in both extreme cold and mild climates, but also qualifies that broad claim: they perform best in milder winters, and air-source output can fall in extreme cold. Keep cold-climate equipment on your shortlist and ask how its available heat compares with your home's needs.
Trane gives a useful distinction, with performance dependent on the system matchup: its current variable-speed heat pumps deliver 100% heating capacity down to around 27°F and 70% down to about 5°F. Its newer low-profile cold-climate heat pumps are described as delivering 100% down to around 5°F and 70% down to about -13°F.
An operating minimum isn't a guarantee that a heat pump will meet your home's full heating demand at that temperature. Ask for the proposed system's cold-weather output to be considered alongside your climate, insulation and heating needs.
Make sense of the efficiency numbers
For a heat pump, HSPF2 describes heating efficiency and SEER2 describes cooling efficiency. For a gas furnace, AFUE means Annual Fuel Utilization Efficiency and describes how much consumed fuel becomes usable heat.
COP, or coefficient of performance, gives you another way to understand heat transfer. A heat pump with a COP of 4 delivers 4 kW of heat for each 1 kW of electricity consumed. Moving existing heat makes that possible, and that efficiency can lower operating costs in suitable climates.
Carrier publishes conflicting figures worth resolving before you select equipment: up to 10.5 HSPF2 and, separately, up to 12.5 HSPF2 for the Infinity 21 Ultimate Cold Climate Heat Pump 27VNA1. Its cold-weather claims also differ, with heating down to -23°F attached to the 27VNA1 and a broader cold-climate claim of -22°F. Ask the dealer to confirm the ratings and cold-weather performance of the exact system being quoted.
The Carrier Infinity 98 Gas Furnace reaches up to 98.5% AFUE. That percentage describes fuel conversion, while a heat pump's HSPF2 is a different rating. Use each rating to compare equipment of its own type, then bring local energy prices and expected runtime into the cross-system cost comparison.
Compare the installed price and the monthly bill separately
Separate the purchase decision into installation expense and ongoing ownership cost. Equipment, installation, home requirements, energy prices, climate and efficiency all affect the total you'll pay.
Trane says its heat pump has a higher upfront cost than its furnace, with potential long-term energy and cost savings. When you compare proposals, include the cooling equipment you need on the furnace side so both proposals cover the same household jobs.
For monthly costs, compare local electricity and fuel prices with the efficiency of the proposed equipment. Heat pump costs also depend on outdoor temperatures and how much the system runs. Furnace costs depend on fuel price, efficiency and heating demand.
A heat pump is often cheaper to run in mild to moderate climates. High electricity prices or extreme cold can favor a natural gas furnace instead. Home size, insulation, ducts, thermostat settings and equipment sizing also influence how much heating you need, so the lowest-cost option changes from house to house.
When keeping both technologies makes sense
A dual-fuel, or hybrid, system pairs an electric heat pump with a gas furnace. The heat pump handles moderate-weather heating and summer cooling, and the system automatically switches to the furnace as colder conditions call for it.
During heat pump operation, the furnace's blower distributes the air through the home. The outdoor changeover temperature is selected during installation around the climate and your utility preferences, so discuss that choice as part of the proposed system.
This option deserves particular attention in a four-season climate or where electricity and gas prices make one fuel especially attractive at different times. It gives you flexibility to use efficient heat pump heating in milder weather and furnace output during cold snaps.
Budget for care as well as equipment life
Plan for regular professional care with either choice. Both systems are safe when properly maintained, and regular inspections by a qualified HVAC technician support safety and service life.
Heat pump upkeep includes coil cleaning, refrigerant-system checks and attention to both outdoor and indoor equipment. Furnace upkeep includes annual inspections, sensor cleaning, filter replacements and component checks, including burners, the heat exchanger, controls and blower. These are service obligations to include in your comparison.
A gas furnace needs proper combustion venting and functioning safety controls to reduce risks from combustion gases, including carbon monoxide. Include those checks in professional furnace service. An electric heat pump uses electricity and refrigerant without combustion.
Carrier's general lifespan estimates are 10 to 15 years for heat pumps and 15 to 20 years for gas furnaces. Actual service life depends on equipment quality, installation, climate, usage and maintenance. If you're comparing long-term ownership costs, keep those conditions attached to the age estimates.
Bring the right information to your assessment
Gather recent utility bills before asking an HVAC professional to compare your options. Those bills let the discussion use your local energy costs alongside your particular home and climate.
Bring notes on your available fuels, existing ductwork, insulation and heating-and-cooling needs. Explain your comfort preferences as well, including whether you value hotter supply air or gentler, longer heating cycles.
Request a home-specific assessment that weighs cost, comfort, efficiency and reliability. Ask the professional to explain which of the suitable options best matches your heating demand and why, including a dual-fuel comparison when your climate and utility prices make it relevant.
More in this category