Heat Pump vs Furnace vs Gas Boiler (2026 Comparison)
A heat pump both heats and cools at 300-400% efficiency and beats electric, oil and propane heating on running cost; against cheap natural gas the savings are smaller but you gain air conditioning and a 30% federal credit. This guide compares heat pumps, gas furnaces and gas boilers on every factor that matters so you can choose with confidence.
One system, both jobs
A heat pump heats in winter and cools in summer at 300-400% efficiency, while a furnace or boiler only heats.
The three systems at a glance
Three technologies dominate US home heating, and they work in fundamentally different ways:
- Heat pump — an electric system that moves heat rather than making it. It pulls warmth from outside air (even cold air) to heat your home, and reverses in summer to cool it. One system, both jobs.
- Gas furnace — burns natural gas to heat air, which is blown through ducts. Heating only; you still need a separate air conditioner.
- Gas boiler — burns gas to heat water for radiators or underfloor heating. Heating only, and not paired with cooling.
The defining difference is efficiency. Because a heat pump moves heat instead of burning fuel, it delivers 300–400% efficiency (a COP of 3–4), while even a top gas furnace is capped near 98%. That gap is the heart of the comparison.
Efficiency compared
Efficiency is measured differently for each system, but the headline numbers tell the story:
| System | Efficiency metric | Typical value |
|---|---|---|
| Heat pump | COP / HSPF2 | 300–400% (COP 3–4) |
| High-efficiency gas furnace | AFUE | 90–98% |
| Standard gas furnace | AFUE | 80% |
| Gas boiler | AFUE | 80–95% |
| Electric resistance | — | 100% |
A furnace can never exceed 100% — it can only convert fuel to heat. A heat pump delivers several units of heat per unit of electricity by harvesting ambient heat, which is why it crushes electric resistance and beats expensive fuels handily.
Running cost: what it depends on
Which system is cheapest to run depends on what it is replacing and on local fuel and electricity prices:
- vs electric resistance / baseboard: a heat pump cuts heating cost 55–65%. Biggest win.
- vs propane: 45–60% cheaper — propane is costly per BTU.
- vs heating oil: 35–50% cheaper, depending on oil and electricity prices.
- vs cheap natural gas: roughly break-even to ~20% cheaper on heating alone; the heat pump's advantage here comes mainly from also replacing your AC.
Estimate your own savings with the Heat Pump Savings Calculator, which compares your current fuel to a heat pump at your chosen efficiency.
Upfront cost compared
Installed costs vary widely, but typical 2026 ranges for a whole home are:
| System | Installed cost | Also cools? |
|---|---|---|
| Air-source heat pump (ducted) | $12,000–$22,000 | Yes |
| Ductless mini-split (multi-zone) | $8,000–$18,000 | Yes |
| Gas furnace + new AC | $8,000–$16,000 | Yes (separate AC) |
| Gas boiler | $6,000–$12,000 | No |
A heat pump's upfront cost looks higher than a furnace alone, but the fair comparison is a heat pump versus a furnace plus a separate air conditioner — because the heat pump does both jobs. On that basis the gap narrows or disappears. Price your options with the Heat Pump Cost Calculator.
The cooling factor
This is the comparison's quiet decider. A furnace or boiler only heats; you still need — and must eventually replace — a separate air conditioner. A heat pump replaces both, so if your AC is also aging, switching to a heat pump avoids two future replacements with one purchase.
For homes that currently have a furnace and a 10+ year-old AC, this is often what tips the math toward a heat pump even where natural gas is cheap: you would have to buy an AC soon anyway, and a heat pump delivers that cooling plus far more efficient heating. Factor the avoided AC replacement into any cost comparison — it is real money.
Comfort and how the heat feels
The systems deliver heat differently, which affects comfort:
- Heat pump delivers a steady, gentle warmth and runs longer at lower output (especially variable-speed models), which keeps temperatures even and humidity controlled. Air from the vents is cooler than furnace air, which surprises some first-time users but is more consistent.
- Gas furnace blasts hotter air in shorter bursts — a feeling many people associate with ‘real’ heat, but with bigger temperature swings.
- Gas boiler with radiators or underfloor heating gives a radiant, draft-free warmth many find the most comfortable of all, though it responds slowly.
Modern variable-speed heat pumps have largely closed the comfort gap, and their even temperatures and built-in dehumidification are advantages in their own right.
Climate suitability
The old objection — ‘heat pumps don't work in the cold’ — is out of date. Modern cold-climate (hyper-heat) heat pumps maintain useful output and a COP above 2 well below freezing, and heat reliably down to -15°F or lower. We cover this in depth in our cold-climate heat pump guide.
That said, in the very coldest climates, sizing and model choice matter, and some homes pair a heat pump with a small backup (a ‘dual-fuel’ system that uses the existing gas furnace only on the rare extreme-cold days). For the vast majority of US homes, a properly specified heat pump handles the climate year-round.
Incentives tilt the field
Heat pumps enjoy federal incentives that furnaces and boilers do not:
- Air-source heat pumps: 30% federal credit up to $2,000 per year (the 25C credit) for qualifying high-efficiency units.
- Geothermal heat pumps: 30% with no cap (the 25D credit).
- State HEEHRA rebates: up to $8,000 for income-qualified households.
A high-efficiency gas furnace can qualify for a small 25C credit, but nothing approaching the heat pump's incentives. See the full picture in our heat pump tax credit guide.
Carbon and the all-electric home
If lowering your carbon footprint matters, a heat pump wins clearly. It burns no fuel on site, and as the electric grid adds more renewables, a heat pump gets cleaner every year — something a gas furnace can never do. Pair it with rooftop solar and you can heat and cool your home with your own electricity; see our IRA guide for how solar, storage and heat pumps stack.
Beyond carbon, removing gas combustion from the home eliminates a source of indoor air pollutants and the small but real risks associated with gas appliances — a benefit some buyers increasingly value.
Maintenance and lifespan
Maintenance needs differ in ways that affect long-term cost. A heat pump runs year-round — heating in winter, cooling in summer — so it accumulates more annual run-hours than a furnace that sits idle all summer. In practice, a heat pump typically lasts 15–20 years, while a well-maintained gas furnace can last 20–30 and a cast-iron boiler even longer. That longevity gap is real, but it is offset by the heat pump replacing two appliances (furnace and AC) and by far lower running costs in most fuel scenarios.
Routine care is similar and modest for all three: change or clean filters regularly, keep the outdoor unit clear of debris and snow, and schedule an annual professional check. Gas systems add one important item heat pumps avoid entirely — combustion safety, including flue inspection and carbon-monoxide monitoring. Removing gas combustion from the home eliminates that risk class, which some homeowners value beyond the dollars.
Noise, footprint and fuel supply
A gas furnace or boiler needs a gas connection, a flue or chimney, and combustion air — infrastructure that not every home has, and that can be costly to add. A heat pump needs only an electrical supply and an outdoor unit, which is why it is often the simpler choice for homes without existing gas service or for all-electric new builds. Homes currently on propane or oil, with their tanks and delivery schedules, often find the switch to a heat pump removes a genuine hassle as well as a cost.
On noise, modern variable-speed heat pumps are quiet, though the outdoor unit does produce a low hum that matters if it sits near a bedroom window or a neighbor's. Furnaces and boilers are indoors and generally quiet apart from the blower or burner. Placement planning — siting the outdoor unit thoughtfully — resolves most heat-pump noise concerns before they arise.
Resale value and buyer expectations
Buyer preferences are shifting toward efficient, all-electric homes, and a modern heat pump that provides both heating and central cooling is increasingly seen as a desirable, move-in-ready feature — especially in regions where buyers expect air conditioning. In markets with high energy costs, the prospect of lower utility bills is a tangible selling point that a dated furnace cannot match.
That said, in some traditional gas-heating markets, buyers still associate gas furnaces with reliable, powerful heat, so local expectations matter. The safest resale position in most of the country in 2026 is a well-installed, efficient heat pump (optionally dual-fuel in the coldest regions), which signals low running costs and removes the need for a separate aging AC the next owner would have to replace.
A cost-of-ownership example
Consider a homeowner with an aging gas furnace and a 12-year-old air conditioner, both near replacement. Option A is to replace both with a new furnace and AC for roughly $12,000. Option B is a single ducted heat pump for about $16,000, less a 25C credit and any state rebate, netting close to the same upfront figure — but with lower annual running costs and only one system to maintain instead of two.
Over a 15-year horizon, the heat pump's combination of efficiency savings, the avoided second appliance, and incentives typically makes it the lower total cost of ownership in this very common scenario — even in a moderate natural-gas market. The math tips hardest toward the heat pump whenever an AC replacement is already looming. Put your own numbers in the Savings Calculator and Cost Calculator.
Which should you choose?
For most US homes in 2026, a heat pump is the best overall choice — it heats and cools, runs efficiently, qualifies for strong incentives, and future-proofs the home. The clearest cases:
- Choose a heat pump if you heat with electric resistance, propane or oil; if your AC is aging; or if you want one efficient system for both heating and cooling.
- A gas furnace may still suit you if you have very cheap natural gas, a recently installed furnace and working AC, and you live in an extreme-cold climate — though even then, dual-fuel is worth considering.
- A boiler makes sense mainly where you already have radiators and value radiant comfort; air-to-water heat pumps can even replace a boiler in that setup.