Boiler replacement cost in Massachusetts in 2026 — including Mass Save rebates of $1,500-$2,750 on qualifying high-efficiency installs. Real numbers for gas, oil-to-gas, and combi conversions. Call (781) 242-2386 for a quote.
If your boiler is past 20 years old, running on 80%-or-lower AFUE efficiency, or showing the wear that signals end-of-life, you’re looking at a replacement decision. The cost depends on what you replace it with — like-for-like, high-efficiency, combi, or full fuel-switch — and what’s behind the walls. Here are real Massachusetts numbers for 2026.
Like-for-Like Gas Boiler Replacement
Cost range: $8,000-$14,000. A direct swap of an aging gas boiler with a modern high-efficiency unit (95-98% AFUE) is the most common Massachusetts replacement. Same fuel, same general configuration, modern equipment with longer lifespan and lower fuel use. Mass Save rebates of $1,500-$2,750 apply on qualifying ENERGY STAR-certified models. We install Buderus, Weil-McLain, Burnham, Lochinvar, Navien, and Viessmann boilers.
Combi Boiler Conversion
Cost range: $10,000-$22,000. A combi boiler handles both space heating and domestic hot water in one unit. Massachusetts homeowners replacing both an aging boiler and an aging tank water heater simultaneously often consider a combi to consolidate. The combi unit is more expensive than a standalone boiler but eliminates the need for a separate water heater. Mass Save rebates apply.
Oil-to-Gas Conversion
Cost range: $10,000-$18,000 (boiler portion). Add $2,000-$5,000 for oil tank removal and any new gas service from the street. Most Massachusetts homeowners switching from oil to gas pay back the conversion in 4-7 years on fuel cost savings alone, before counting equipment efficiency gains. Mass Save rebates stack on top. We handle the gas utility coordination, permits, demolition, and installation. More on our oil-to-gas conversion service.
Heat Pump Alternative
Some Massachusetts homeowners consider a cold-climate heat pump conversion instead of replacing the boiler. Mass Save rebates on heat pump installs are larger (up to $10,000), and you eliminate fossil fuel heating entirely. The trade-off is electrical capacity and possibly retaining the boiler as backup. We model both options on the same consultation so you can decide.
Frequently Asked Questions
What’s the typical boiler replacement cost in Massachusetts?
A direct like-for-like high-efficiency gas boiler replacement in Massachusetts typically runs $8,000-$14,000 in 2026. Combi boiler conversions (heat plus domestic hot water in one unit) run $10,000-$22,000. Oil-to-gas conversions add $2,000-$5,000 for tank removal and gas service work. Mass Save rebates apply on qualifying high-efficiency installs.
How much do Mass Save rebates take off?
Mass Save rebates of $1,500-$2,750 apply to qualifying high-efficiency gas boiler installations in Massachusetts. Combined with the 0% HEAT Loan financing, most homeowners see meaningful upfront cost reduction. We handle the rebate paperwork as part of the install.
Do I need to replace my boiler or can it be repaired?
Repair often makes sense for boilers under 15 years old with a single failed component. Replacement makes sense when the boiler is 20+ years old, the AFUE rating is below 80%, you’ve had multiple repair calls in the past few seasons, or the heat exchanger is cracked. We give you both numbers — repair vs replacement — at the in-home consultation so you can decide.
How long does boiler replacement take?
A standard high-efficiency gas boiler replacement takes one full day in most Massachusetts homes. Combi boiler conversions and oil-to-gas conversions can run 1-2 days depending on venting, gas line, and old equipment removal. We pull permits and coordinate with the local building department.
Looking at boiler replacement in Massachusetts? Sedona Plumbing and Heating dispatches from our Winchester shop to 23 Greater Boston towns. Master Plumber licensed, gas fitter, Mass Save registered. Call (781) 242-2386 for a quote — we model multiple options at the in-home consultation and handle the rebate paperwork as part of the install.
