Heat Pump vs Furnace: Which Is Right for Your Home?

Neither is better in the abstract. A heat pump suits a home with no gas service, a home that also needs air conditioning replaced, or a home where the fuel being left behind is electric resistance or oil. A gas furnace suits a home with existing gas service, working ductwork sized for warm air, and a homeowner who wants the lowest installed cost and the hottest supply air.

The table below puts the two side by side on the five things that actually decide it, and every figure in it is sourced. Below that, the same comparison applied to what running each one costs at current Pennsylvania and New Jersey energy prices, where the answer flips depending on which side of the river you live on.

Heat Pump vs Furnace: The Short Answer

	Heat pump	Gas furnace
Installed cost	Average $6,087; most homeowners $4,237 to $7,943 (Angi 2026 data)	$3,800 to $10,000 for an average-sized home (Angi 2026 data)
What you also get	Cooling included; no separate AC needed	Heating only; an air conditioner is a separate purchase
Efficiency	Delivers up to 3x more heat energy than the electricity it consumes (ENERGY STAR)	Capped by the fuel: a 95% AFUE furnace delivers at most 95% of the energy in the gas it burns
Service life	ENERGY STAR advises evaluating replacement past 10 years (ENERGY STAR)	ENERGY STAR advises evaluating replacement past 15 years (ENERGY STAR)
Supply air temperature	Milder, typically in the 90s°F; steady, longer run cycles and more consistent room temperatures	Hotter, typically 120°F and up; shorter, more noticeable cycles
Best fit	No gas service, no ductwork (ductless), AC also due for replacement, leaving electric or oil heat	Gas already on site, ductwork in good shape, lowest upfront cost is the priority, very cold design temperatures

How Each One Works

The heat pump

A heat pump moves heat rather than making it. Refrigerant circulating between an outdoor coil and an indoor coil absorbs heat from the outside air, a compressor raises that heat to a useful temperature, and the indoor coil releases it into the house. A reversing valve flips the direction of flow in summer, so the same equipment cools. Because it relocates energy rather than producing it, output can exceed input several times over. Below a certain outdoor temperature, auxiliary heat covers the shortfall.

The gas furnace

A furnace burns natural gas in a sealed heat exchanger. A blower pushes house air across the outside of that exchanger, the air picks up heat, and the combustion gases go out the flue. Efficiency is expressed as AFUE, the percentage of the fuel's energy that ends up as heat in the house. A modern condensing furnace runs 95 to 98 percent AFUE, and it hits that number regardless of how cold it is outside, which is the furnace's structural advantage.

Cost to Buy and Cost to Run

These are two different questions and mixing them is where most of the confusion comes from.

Cost to buy

Furnaces are cheaper to install. A heat pump replaces two systems at once, so the fair comparison is not "heat pump versus furnace" but "heat pump versus furnace plus air conditioner." Angi's 2026 data puts a full HVAC replacement at $5,000 to $22,000 with an average of $7,500, and a central air conditioner alone at $3,900 to $7,900. Once you add an AC to the furnace side, the gap narrows considerably.

One 2026 change matters here: the federal 25C tax credit that paid up to $2,000 toward a qualifying heat pump ended for equipment placed in service after December 31, 2025. Any cost comparison written before 2026 that leans on that credit is now wrong.

Cost to run

Operating cost depends entirely on local fuel prices, and in our region they point in different directions. Using the June 2026 state averages from the U.S. Energy Information Administration for residential electricity and residential natural gas, and assuming a heat pump running at a coefficient of performance of 3 and a 95% AFUE furnace:

Cost per million BTU of delivered heat	Heat pump	Gas furnace
Pennsylvania (electricity 21.73¢/kWh, gas $26.08/Mcf)	about $21	about $26
New Jersey (electricity 24.95¢/kWh, gas $17.68/Mcf)	about $24	about $18

Read that carefully, because it is the whole argument in two rows. At June 2026 prices a heat pump is the cheaper heat in Pennsylvania and a gas furnace is the cheaper heat in New Jersey. Two caveats apply honestly: these are June figures, and both fuels are priced differently in the depth of winter; and a heat pump's coefficient of performance falls as it gets colder, so its real seasonal average will be below 3 on the coldest weeks. The point is not the exact number, it is that "heat pumps are always cheaper to run" is not true here, and neither is the reverse.

Rebates, Requirements and Long-Term Savings

Beyond the equipment itself, three practical things separate the two options over the long term. Electrical requirements: a heat pump may need panel capacity a gas furnace does not, and that work belongs in the comparison. Rebates: utility programs in Pennsylvania and New Jersey regularly offer incentives for qualifying heat pumps, while gas equipment rebates are usually smaller, so the net upfront difference is often narrower than the sticker suggests. Maintenance: a heat pump is serviced twice a year because it works in both seasons, while a furnace is serviced once.

The carbon side matters to some homeowners and not to others, but it is worth stating plainly rather than leaving vague: a heat pump burns nothing on site, so emissions depend on the grid, while a furnace is burning gas in the house. Whichever direction you lean, ask a contractor to price both for your address instead of comparing national averages - the right answer here depends on your fuel prices, your ductwork and your panel, and those are specific to the house.

Which One Fits Your Home

You have gas service and working ductwork

A furnace is the lower-cost, lower-risk choice, especially in New Jersey where gas is currently the cheaper fuel. Homes on propane rather than natural gas should run the same comparison with their own delivered price, which is usually higher. If the air conditioner is also near the end of its life, price a dual-fuel system before deciding, because you can add a heat pump to the same ductwork and let controls pick the cheaper fuel each day.

You have no ductwork

A ductless heat pump wins, and it is not close. Installing a duct system in a Philadelphia rowhome or an older twin costs more than the equipment does, and Angi puts new ductwork at $2,000 to $7,500 on its own.

You heat with electric resistance or oil, or the house is poorly insulated

A heat pump is almost always the better outcome. Against electric baseboard or strips, the Department of Energy estimates a modern heat pump cuts electricity used for heating by about 65 percent. Against oil, you also drop the tank, the deliveries and the annual combustion service.

Fix the envelope first, whichever system you choose. A heat pump delivers milder air over longer cycles, so a leaky house exposes it faster than a furnace does. Attic insulation and duct sealing usually deliver more comfort per dollar than the difference between the two systems, and they cut the running cost of whichever one you choose.

You are choosing on upfront price alone

A furnace, replaced like for like, is the cheapest way to have heat this winter. That is a legitimate answer, and any contractor who refuses to give it to you is selling rather than advising.

What This Means in Philadelphia and New Jersey

Local housing stock and utility rates decide this more often than the technology does. Different regions of the country reach opposite conclusions for exactly that reason, and Pennsylvania and New Jersey are close enough to be a good example of it. Philadelphia rowhomes and twins frequently have radiators and no duct system, which points to ductless heat pumps. Post-war Cape Cods and split-levels across South and Central Jersey usually have ducts, but those ducts often run through unconditioned attics, which erodes the performance of anything connected to them.

Winter design temperatures here sit in the low teens, comfortably within what ENERGY STAR cold-climate models are designed and third-party tested to handle down to 5°F. Colder climates and harsher winters shift the answer; ours do not. So the climate is not the obstacle. Fuel price is what separates the two, and as the table above shows, that currently lands differently in Pennsylvania than it does in New Jersey.

Synergy3 Home Solutions has been installing both types across this region since 2006. Our NATE-certified technicians size from a room-by-room load calculation and quote both options where both are viable, so you see the actual numbers for your house rather than a general argument. See Heat Pump Installation for how we scope heat pump work.

Get Both Options Priced

The only honest way to settle this is to price both for your specific house. Get in touch with Synergy3 Home Solutions. We are family-run out of Philadelphia, with 20 years in the trade, a 4.9-star rating, and 500+ Google reviews. Our hours are Monday to Friday 7:00 am to 7:00 pm and Saturday 7:00 am to 3:00 pm during peak season, with same-day service available on most calls.