Furnace Replacement Cost in Massachusetts (2026): Gas, Propane, Electric, and When to Skip It

If your forced-air furnace just died in February, this is the guide for you, not the boiler one. A furnace blows hot air through ducts. A boiler heats water and pushes it through radiators or baseboards. The replacement decisions look superficially similar and are actually quite different; if you have a boiler, start with our boiler replacement guide instead.

The short 2026 reality, before any quote arrives: Mass Save no longer rebates new gas, oil, or propane heating equipment for most homeowners, and the federal 25C tax credit on heating equipment expired on December 31, 2025. So the dollar figure on the contractor's quote is much closer to what you actually pay than it was two years ago. Plan the budget accordingly.

What a new furnace costs in Massachusetts

These are the bands Massachusetts contractors typically quote for a single-family swap, including equipment, labor, basic permit, and disposal of the old unit. Treat them as the starting conversation, not a number you can hold a contractor to without a site visit. There is no government-published "MA furnace install price", anyone who tells you there is one is making it up.

Furnace type	Typical installed cost band (2026 MA)	What pushes the high end
80% AFUE gas furnace, like-for-like swap	$4,500 – $7,500	Tight basement access, transitions to existing duct trunk, gas-line code updates
95–97% AFUE condensing gas furnace	$7,500 – $12,000	New PVC sidewall venting, condensate line + pump, chimney liner if a water heater is orphaned
Oil furnace replacement (in-kind)	$6,500 – $11,000	New tank if the existing tank is past its insurable life; chimney work
Propane furnace (in-kind)	$5,500 – $9,500	Tank lease arrangements, regulator/line work
Electric furnace (resistance strip)	$2,500 – $5,500	Panel upgrade to handle a 60–80 amp circuit
New ductwork (full house, when needed)	$6,000 – $15,000 add-on	Plaster/lath walls, multiple finished floors, asbestos in old duct insulation

Multi-zone systems, condo conversions, and triple-decker work that touches multiple units land higher. Boston and the inner suburbs run measurably more expensive than Worcester County or the South Coast on labor alone.

A few honest notes on the table. The electric furnace number looks great until you see the operating bill, Massachusetts residential electricity averaged 30.21 ¢/kWh in March 2026 (EIA), among the highest in the country. Resistance heat at that rate is the most expensive way to heat a Massachusetts house. If you're looking at an electric furnace, you should be looking at a heat pump instead (more on that below). And the propane number is similarly misleading on operating cost, MA residential propane was $3.65/gallon the last week of March 2026 (EIA).

What drives the range up or down

The headline price hides four MA-specific variables that explain why one quote is $5,800 and the next is $11,400 for the "same" job.

80% vs 95%+ AFUE, and what the venting actually costs

AFUE (Annual Fuel Utilization Efficiency) is the fraction of fuel converted to usable heat. The federal tiers (energy.gov):

• Low: 56–70% AFUE (pre-1990s equipment, basically retired)
• Mid: 80–83% AFUE (atmospheric combustion, metal flue up the chimney)
• High: 90–98.5% AFUE (sealed combustion, condensing, PVC sidewall vent + condensate drain)

ENERGY STAR's minimum for gas furnaces in the northern U.S., which is all of Massachusetts, is 95% AFUE (ENERGY STAR criteria). The oil minimum is 85%.

A condensing 95%+ furnace is genuinely more efficient: you keep an extra 15 percentage points of the gas you pay for. But it also changes the installation. Three real cost adders that an 80% swap doesn't trigger:

• PVC sidewall venting. Two pipes through an exterior wall (intake and exhaust). On a finished basement, expect a clean run; on a tight triple-decker basement, the routing gets creative.
• Condensate handling. A condensing furnace produces a few gallons of acidic water per day. It needs a floor drain or a condensate pump to a utility sink.
• Chimney liner. Here's the one that surprises homeowners. If the old 80% furnace shared a chimney flue with your gas water heater, the chimney was sized for both. Pull the furnace, and the water heater is now venting into an oversized, cold flue, which causes flue spillage and carbon-monoxide risk. The fix is a new stainless liner sized for the water heater alone, or a swap to a power-vented / heat-pump water heater. See our heat-pump water heaters guide, for some homes, doing both swaps together is cheaper than doing the liner.

The total venting/condensate/liner package can add $1,500–$4,000 to a 95% install over an 80% one. The fuel savings pay it back, eventually, but if you're staying in the house five years, that math is tighter than the brochure suggests.

Gas line, propane tank, and panel capacity

• Gas line. A new high-input furnace sometimes needs a larger gas line from the meter, especially if the home has been upgrading appliances over the years and the existing 1/2" line is at its limit.
• Propane tank. Most MA propane homes lease the tank from the supplier. A larger furnace may trigger a tank upsize and a new regulator. Check the supplier contract before assuming this is free.
• Electrical panel. Modern condensing furnaces draw little electricity, but an electric furnace or a heat pump conversion can need a panel upgrade. A 100A panel in a 1950s Cape often can't carry an electric furnace's 60–80 amp draw on top of existing loads. A 200A upgrade in MA runs in the four figures and isn't always on the quote you've already signed.

Ductwork condition

The new furnace blows through your existing ducts. If those ducts are undersized, leaking at joints, uninsulated through unconditioned attic, or, worst case in a 1950s home, wrapped in friable asbestos, the install scope changes fast. A reputable installer pressure-tests the duct system as part of the proposal. A cheap one quotes the furnace and lets you find out about the ducts later.

In MA triple-deckers and chopped-up Victorians, you also see custom duct runs that snake through closets and built-out chases. Replacement is sometimes literally a wall-removal job. That's the kind of detail that needs to be on the contract.

The chimney itself

Beyond the water-heater liner question, the chimney on older MA homes has its own life expectancy. If you're capping or abandoning a chimney that's served combustion equipment for 60 years, get a sweep's eyes on it. A failing chimney that's no longer doing its old job can still leak water into the wall, and "while we're here" is the cheapest moment to deal with it.

What Mass Save and federal incentives cover in 2026

Almost nothing for a gas furnace, and that's the headline.

Mass Save's residential gas-heating page is explicit: "rebates, incentives, and financing for equipment powered by natural gas, oil and propane are no longer available. The only exception is for income-eligible households." (masssave.com). If a contractor quotes you a "$500 high-efficiency furnace rebate" in 2026, ask which utility is paying it and get the program name in writing, chances are it's pre-2024 marketing copy that nobody updated.

Income-eligible households (the Mass Save income thresholds tied to area median income) still have access to enhanced rebates on high-efficiency fossil fuel replacements and substantially larger heat pump incentives (enhanced rebates page). Worth checking your eligibility through Mass Save directly before signing anything.

The federal IRS 25C Energy Efficient Home Improvement Credit, the $600 furnace credit and the $2,000 heat pump credit, expired for equipment placed in service after December 31, 2025. A furnace installed in 2026 does not qualify for any federal tax credit. Any blog or contractor quote saying otherwise is out of date.

What's still real:

• Mass Save 0% HEAT Loan (up to $25,000, 7-year term). The HEAT Loan funds heat pumps, weatherization, and other electrification, it does not fund a new fossil-fuel furnace, but it can finance the heat pump alternative. See the HEAT Loan guide.
• Mass Save heat pump rebates. Whole-home air-source: $2,650/ton, capped at $8,500 per home in 2026. Partial-home: $1,125/ton, capped at $8,500. Income-eligible enhanced: up to $16,000 (masssave.com). Full detail and current tiers in our 2026 heat pump rebate guide.
• Mass Save Home Energy Assessment. Free for investor-owned-utility customers, and it surfaces insulation and air-sealing work subsidized at 75%+. Worth doing whether you replace the furnace or not. See the assessment guide.

If you live in one of the ~40 MA Municipal Light Plant towns (Belmont, Concord, Reading, Wellesley, Hingham, Norwood, Mansfield, Taunton, Holyoke, Westfield, and others), Mass Save itself doesn't apply to your electric service. Your MLP usually runs a smaller heat-pump program. The federal 25C expiration applies in MLP towns too. Details in MLP towns and Mass Save.

Should you skip the furnace and go heat pump in 2026?

This is the question most Massachusetts homeowners aren't asking hard enough. A dead furnace in January is a same-week panic, and the default move is like-for-like, but the rebate math has shifted enough that the "obvious" answer is no longer obvious.

The honest case for keeping the gas furnace in 2026:

• Massachusetts natural gas was $27.17 per thousand cubic feet for residential customers in March 2026 (EIA), roughly $2.70/therm, which is cheap heat per BTU. MA electricity at 30¢/kWh is expensive heat per BTU even after the heat pump's 2–3× efficiency multiplier. A heat pump won't always beat cheap gas on operating cost.
• A like-for-like 95% AFUE gas furnace swap is a known job that most contractors can do in a day. Heat pump conversions run 3–6 weeks from contract to install, plus rebate paperwork.
• No panel upgrade typically needed.

The honest case for switching to a heat pump:

• The $8,500 Mass Save whole-home rebate plus the 0% HEAT Loan closes most of the upfront cost gap. A ducted heat pump in MA typically lands around $12,000–$22,000 pre-rebate; after the rebate it's competitive with a high-efficiency furnace, often within $2,000–$5,000.
• One system instead of two. The heat pump cools in summer, so a furnace + central AC replacement becomes a single heat pump install.
• If your existing ducts can be reused, the conversion is less disruptive than people assume.
• If you're heating with propane or oil, the operating-cost case is much stronger, see the oil-to-heat-pump conversion guide for the deeper dive.
• Massachusetts is past the "heat pumps don't work in cold weather" era. A properly sized cold-climate unit holds the house through Worcester's 4°F design day (ASHRAE 99% values) on the compressor alone. The Berkshires (Pittsfield, −4°F) need more careful sizing, see cold-climate heat pump sizing in Massachusetts.

The case that genuinely tips toward the furnace:

• You have cheap gas, decent ducts, the existing furnace is the only thing in the chain that died, and you're staying in the house under 5 years. Like-for-like 95% AFUE gas is the rational call.

The case that genuinely tips toward the heat pump:

• Your AC is also aging, or you have no central AC and want it. Two-for-one swap.
• You heat with oil, propane, or electric resistance. The operating-cost win is real.
• You're going to do envelope work anyway (Mass Save Home Energy Assessment surfaced insulation needs). The whole-home rebate's weatherization prerequisite is easier to clear than people think, your home qualifies if it was built during or after 2000, OR your assessment shows <$1,000 of recommended weatherization, OR you've completed weatherization recommendations from 2013 or later (masssave.com).

The defensible 2026 move for most MA gas-furnace homes that aren't in active panic: ask the contractor for both quotes, a 95% AFUE gas furnace and a ducted heat pump with Mass Save rebate applied. See the two net numbers side by side. Make the call on data, not on the default.

Five questions before signing the furnace contract

1. "Is the chimney liner in this quote, or a change order?" If you're going from 80% to 95% AFUE and a gas water heater shared the flue, the liner is a real expense. It belongs on the contract, not on a surprise invoice three weeks later.
2. "What's the AFUE, the model number, and the heating capacity in BTU/hr?" A contractor who quotes "high-efficiency furnace, 100,000 BTU" without naming a model is selling you what's on the truck, not what's right for the house. Manual J sizing is the floor, not optional, oversizing causes short-cycling, comfort problems, and shorter equipment life.
3. "Did you check the existing ductwork?" Pressure test, visual on accessible runs, and a look at the return-air capacity. New furnace into bad ducts is the silent reason for "the new furnace doesn't heat as well as the old one."
4. "Have you quoted a heat pump alternative with the Mass Save rebate applied?" If they say no on principle, find another contractor. The honest installers will give you both numbers and let you pick.
5. "What does the warranty actually cover, and for how long?" Modern gas furnaces typically carry 10-year parts warranties (sometimes 20-year on the heat exchanger). Labor coverage is usually shorter, 1 to 2 years. Get it in writing, with the registration steps the warranty requires.

FAQ

Does Mass Save still give rebates for new gas furnaces in 2026?

No, not for most homeowners. Mass Save's residential page on gas heating equipment states that rebates, incentives, and financing for natural gas, oil, and propane equipment are no longer available, with the only exception being income-eligible households (source). If a contractor or blog quotes a 2026 gas-furnace rebate, ask for the program name and verify directly with Mass Save before counting on it.

Is the federal $600 furnace tax credit still available?

No. The IRS 25C Energy Efficient Home Improvement Credit expired for equipment placed in service after December 31, 2025. A furnace installed in 2026 does not qualify for any federal tax credit. The Mass Save heat-pump rebate stack is now the main incentive lever in Massachusetts.

80% AFUE or 95% AFUE, which should I install?

In Massachusetts, ENERGY STAR's certified threshold for gas furnaces in the northern U.S. is 95% AFUE, and that's the right floor for most homes (source). The exceptions are tight retrofit situations where venting a condensing furnace's PVC pipe isn't practical, or where the existing chimney already has to be relined for an orphaned water heater anyway and an 80% unit doesn't trigger that work. Get both quotes if the situation is borderline.

How long does a gas furnace last in Massachusetts?

A residential gas furnace in MA typically runs 15–20 years before replacement makes economic sense. Heat exchangers can develop cracks earlier in homes with corrosive basement environments (salt-air coastal locations, persistent humidity). Once annual repair costs exceed about half a new install, or the heat exchanger cracks, replacement is the right call.

Can a heat pump reuse my existing ductwork?

Often yes, if the ducts are reasonably sized and sealed. A ducted central heat pump uses the same supply and return ducts a furnace does. The contractor should pressure-test and inspect the duct system before quoting, some homes need duct modifications, especially if the original ducts were sized for a smaller, lower-airflow furnace. See central AC vs. heat pump for Massachusetts homes for the broader swap context.

What about propane and oil furnaces?

Propane furnace replacement runs in a similar band to gas, but operating cost is much higher, MA propane was running about $3.65/gallon at the end of the 2025–26 heating season (EIA). Oil furnaces are uncommon in MA today (oil-fired equipment is mostly boilers), but where they exist, the heat-pump case is even stronger than for gas. If you're on oil, start with the oil-to-heat-pump conversion guide.

---

If you're getting quotes, compare vetted Massachusetts HVAC contractors and ask each for the two-option write-up: a like-for-like furnace and a heat pump with Mass Save rebate applied. The net numbers side by side, against your actual fuel bills, are how this decision gets made well.