HVAC Repair, Installation & Replacement in Boston, MA
No city in New England mixes housing like Boston — triple-deckers in Dorchester, steam-heated brownstones in the South End, condo conversions everywhere, and single-families across West Roxbury and Hyde Park. The right HVAC answer depends on which one you own.
Get Matched With a Boston HVAC ProServing Boston neighborhoods
Dorchester West Roxbury Roslindale Hyde Park Jamaica Plain South Boston East Boston Charlestown Brighton & Allston MattapanTell Us About Your Heating or Cooling Project.
Share a few details about your system, property, and the help you need. We’ll use that information to connect you with a relevant Massachusetts HVAC professional.
ContactHVAC does not directly repair or install HVAC systems. We provide independent information and help Boston homeowners connect with relevant local HVAC professionals.
Triple-Deckers and Multi-Family HVAC
Boston’s triple-deckers are their own HVAC discipline. Some run one aging boiler for the whole building; others have been split into three separate systems over decades of conversions. Who pays for heat, where equipment can physically go, and how three units share basement and roof space all shape the right answer.
For owner-occupants, the big questions are usually whether to separate heating by unit, how to add cooling floor by floor, and whether Mass Save’s multi-family pathways — which cover 1–4 unit owner-occupied buildings — can offset a conversion. Landlords face the same decisions plus tenant metering and access logistics.
Whatever the building, get contractors who can point to similar Boston multi-family work — it’s a different job than a suburban single-family swap.
Repair-or-replace decisions on shared boilers affect every floor — and every lease. Boiler guidance →
Per-unit heat pumps or furnaces end the who-controls-the-thermostat problem and simplify utilities. Heat pump guidance →
The standard way Boston multi-families add AC without ductwork or major construction. Mini-splits →
Owner-occupied multi-families generally qualify for assessments, rebates, and HEAT Loan financing across all units.
Tell Us About Your Boston HVAC Project
Triple-decker, brownstone, condo, or single-family — share your building type, neighborhood, and the help you need. Those details determine which professional fits.
What Boston HVAC Pros Service Most
Steam & hot-water boilers
From South End brownstones to Dorchester multi-families — Boston runs on radiators.
Boiler repair →Gas furnaces
Common in outer-neighborhood single-families and renovated buildings with ductwork.
Furnace repair →Central air & AC repair
Frozen coils, capacitor failures, and drainage problems spike in humid stretches.
AC repair →Mini-split systems
The city’s default retrofit for cooling radiator-heated homes and multi-family units.
Mini-splits →Cold-climate heat pumps
Mass Save rebates and city decarbonization pushes are driving conversions across neighborhoods.
Heat pumps →Thermostats & zoning
Multi-floor homes and converted buildings often need controls as much as equipment.
All services →Boston prices run high — compare with context
The metro’s labor rates top the state, and older-building scope (venting, electrical, access) expands quotes. Know what moves the number before you sign.
Boston Neighborhoods We Cover
Also serving Quincy, Milton, Cambridge, Somerville, and Brookline — see our Quincy and Milton pages, or explore HVAC help across Massachusetts.
Boston HVAC Questions, Answered
How do I add AC to a Boston triple-decker?
Floor-by-floor ductless mini-splits are the standard answer — each unit gets independent cooling without ductwork or shared-system disputes. The planning questions are outdoor-unit placement (yard, walls, or roof), electrical capacity per unit, and whether the work is coordinated across owners in condo-converted buildings.
Should we replace the shared boiler or separate heat by unit?
A shared boiler replacement is cheaper up front; per-unit separation costs more but ends thermostat disputes, simplifies billing, and raises property flexibility. For owner-occupied 1–4 unit buildings, Mass Save pathways can support either route — get quotes for both before deciding.
Do condo owners need association approval for HVAC work?
Usually, for anything touching common or exterior elements — outdoor condensers, wall penetrations, roof placement, or shared systems. In-unit like-for-like replacements are often simpler. Check your association documents before getting quotes so contractors can bid the approved configuration.
How much does HVAC replacement cost in Boston?
Boston-metro labor rates are the state’s highest, and older-building scope — venting, electrical service, tight access, masonry penetrations — moves quotes more than the equipment brand does. Get at least two itemized quotes and compare scope line by line, and review our cost guide for what drives each number.
Find an HVAC Professional Serving Boston
Every neighborhood, every building type — tell us what’s going on and we’ll identify a relevant local professional for your Boston property.
Get HVAC HelpWhat makes a Boston HVAC project different?
Boston requires licensed contractors to apply for electrical permits. Service upgrades and projects that open walls can trigger additional permit review, and larger projects may require HVAC, electrical, plumbing and energy documentation.
Boston permit planning →Triple-deckers, condo conversions and brownstones often introduce shared systems, association approval, limited exterior condenser locations and tight routes for ducts, refrigerant lines and electrical work.
Older-home heat-pump sizing →Boston quotes can be driven as much by access, masonry penetrations, electrical service, duct routing and permitting as by the equipment itself.
2026 Massachusetts HVAC Cost Index →