Heat Pump vs Furnace
A side-by-side comparison of heat pumps and gas furnaces — upfront cost, operating cost, efficiency, comfort, and climate fit.
Last updated: May 2026
| Factor | Heat Pump | Gas Furnace |
|---|---|---|
| Installed Cost | $5,500–$12,500 | $3,000–$7,000 |
| Cooling Included | Yes | No — AC separate |
| Efficiency | 200–300% (COP 2–3) | 80–98% AFUE |
| Monthly Operating Cost | Lower in mild climates | Lower where gas is cheap / very cold |
| Cold Climate Performance | Needs cold-climate model below ~20°F | Unaffected |
| Lifespan | 10–15 years | 15–20 years |
| Tax Credits | Up to $2,000 federal | Limited |
| Emissions | Low (electric) | On-site combustion |
Cost Comparison
On sticker price alone, the furnace wins easily: $3,000–$7,000 installed versus $5,500–$12,500 for a whole-home heat pump. But that comparison is misleading, because it isn't apples to apples. A furnace only heats — if you also need cooling, you're buying a separate central AC for another $4,000–$8,500, pushing the combined system to $7,500–$15,500. A heat pump does both jobs with one piece of equipment. If you're replacing heating and cooling at the same time, the heat pump is often the cheaper upfront option — before you even count the federal tax credit of up to $2,000, which the gas combo doesn't get.
Operating costs come down to physics and utility rates. A gas furnace converts fuel to heat at 80–98% efficiency (AFUE) — it can never deliver more energy than it burns. A heat pump doesn't generate heat; it moves it from outdoors to indoors, delivering 2–3 units of heat per unit of electricity (a COP of 2–3, or 200–300% effective efficiency). Whether that wins on your bill depends on what you pay per unit of energy.
A worked 10-year example: Take a 2,000 sq ft home in a moderate climate needing roughly 50 million BTU of heat per winter. A 95% AFUE furnace burns about 526 therms; at $1.50/therm that's ~$790 per winter. A heat pump at an average COP of 2.8 uses about 5,230 kWh; at $0.16/kWh that's ~$840 per winter — roughly a wash. Over 10 years, both spend about $8,000 on heating. But shift the rates and the picture flips fast: at $0.12/kWh the heat pump drops to ~$630 per winter and saves $1,600 over the decade, while at $1.00/therm the furnace drops to ~$530 and wins by a similar margin. Add the heat pump's ~$2,000 tax credit and its typically lower combined install price, and the total 10-year cost usually favors the heat pump anywhere winters are mild to moderate — while cheap gas plus harsh winters keep the furnace on top in the coldest states.
Heat Pump Pros & Cons
Pros
- One system heats and cools — replaces both furnace and AC
- 2–3x more efficient than any combustion heating
- Qualifies for up to $2,000 federal tax credit plus state and utility rebates
- No on-site combustion — no carbon monoxide risk, no gas line needed
- Gentler, more even heat without the hot-blast/cool-down cycle
Cons
- Higher upfront cost than a furnace alone
- Standard models lose capacity and efficiency below ~20°F
- Shorter lifespan (10–15 years) because it runs year-round
- Supply air feels cooler than furnace heat (~90–100°F vs 120°F+)
- Operating cost depends heavily on local electricity rates
Gas Furnace Pros & Cons
Pros
- Lowest upfront cost of any whole-home heating system
- Full heating power at any outdoor temperature, even -20°F
- Longer lifespan (15–20 years) — it rests all summer
- Hot, fast supply air that many people prefer on cold days
- Cheap to run where natural gas prices are low
Cons
- Heating only — cooling requires a separate AC system
- Capped below 100% efficiency by physics (80–98% AFUE)
- On-site combustion: carbon monoxide risk and annual safety checks
- Requires a gas line — costly to add if you don't have one
- Minimal tax credit eligibility compared to heat pumps
Which Should You Choose?
Choose a Heat Pump If:
- You live in a mild or moderate climate where winter lows rarely stay below 20°F
- You're replacing your AC and furnace at the same time — one heat pump is usually cheaper than both
- You want the federal tax credit (up to $2,000) and any state or utility rebates on top
- Your home has no gas line — a heat pump avoids the $1,000+ cost of running one
- You want to cut your home's on-site emissions and carbon monoxide risk to zero
Choose a Furnace If:
- You get sub-zero winters where a standard heat pump would lean on expensive backup heat
- Natural gas is cheap in your area relative to electricity
- You're only replacing the furnace and your AC still has years of life left
- You need the tightest possible upfront budget — nothing beats a furnace's install price
- You prefer the hot, fast supply air a furnace delivers on the coldest mornings
The Hybrid Option: Dual-Fuel Systems
You don't have to pick just one. A dual-fuel system pairs a heat pump with a gas furnace as its backup. The heat pump handles heating (and all cooling) whenever outdoor temperatures are mild — which is most of the season, even in cold states — and the furnace automatically takes over below a set switchover point, typically 25–35°F, where gas becomes the cheaper or more capable fuel. You get heat-pump efficiency for the bulk of your heating hours and furnace muscle for the cold snaps.
Dual-fuel costs more upfront — roughly $8,000–$16,000 installed since you're buying both appliances — but it's the strongest answer for cold-climate homeowners who already have gas service. If your furnace is due for replacement anyway and your AC is dying too, swapping the AC for a heat pump and keeping a new furnace as backup often costs little more than a conventional AC-plus-furnace replacement while cutting gas usage 50–70%.
Ready to Decide?
Size your system first — the right tonnage matters more than the fuel — then see what your full installation will cost.
Size Your System First → See Full HVAC Installation Costs →Frequently Asked Questions
In mild and moderate climates, usually yes — a heat pump heats and cools with one system, runs 2–3x more efficiently than combustion, qualifies for up to $2,000 in federal tax credits, and is often cheaper than buying a furnace plus a separate AC. In climates with long stretches below 20°F, a gas furnace (or a dual-fuel heat pump with furnace backup) is the better choice: it delivers full heating power at any temperature and costs less to run where natural gas is cheap.
Yes. Standard heat pumps keep working below 32°F but progressively lose capacity and efficiency, typically becoming impractical without backup heat somewhere below about 20°F. Modern cold-climate models are a different story — they use enhanced compressors and are rated to deliver useful heat down to -13°F, and some hold 70–80% of their rated capacity at 5°F. Efficiency still declines as temperatures drop, which is why homeowners in the coldest regions often pair a heat pump with a furnace in a dual-fuel setup.
It depends on your electricity and gas rates. A heat pump delivers 2–3 units of heat per unit of electricity, while a 95% furnace delivers just under 1 unit per unit of gas. As a rule of thumb: compare your electric rate in $/kWh to your gas rate in $/therm — if your gas price per therm is more than about 20x your electric price per kWh (e.g., $1.60/therm vs $0.08/kWh), the heat pump wins; if it's under about 10x (e.g., $1.00/therm vs $0.16/kWh), the furnace usually runs cheaper. In between, they're close and comfort preferences can decide it.