Seasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
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Most HVAC calls in Somerville involve triple-deckers built between 1890 and 1920 with steam heat, no central air, and balloon-frame walls that make ductwork retrofits nearly impossible. Coldharbour Heating & Air handles these jobs daily: we repair aging furnaces and boilers through cold, damp winters, and we install ductless mini-splits floor by floor when summer heat-island temperatures push 90°F on dark rooftops. Call (817) 402-2972 and a live person picks up, day or night.
Why Somerville Homes Are Different
Somerville’s housing stock is unlike anywhere else in Greater Boston. Roughly 1890-1920 wood-frame triple-deckers dominate every neighborhood from Winter Hill to East Somerville, built with gravity or steam heat and zero provision for cooling. The shallow joist bays, dense compartmentalized floor plans, and party-wall construction mean running new ductwork through balloon-frame walls is often more expensive than the equipment itself.
The city’s rapid condo conversion boom adds another layer. In East Somerville and Winter Hill, we regularly find a single 1950s-era oil-fired steam boiler in the basement serving all three units with no sub-metering. Separating that system to satisfy condo documents, often while converting from oil to gas, is a signature Somerville job that rarely shows up in neighboring Cambridge or Medford at the same volume.
Climate stacks the deck too. Somerville sits in Greater Boston’s humid continental zone, with cold, damp winters that stress old steam boilers hard. But the city’s exceptional urban density and dark rooftop surfaces intensify the summer heat-island effect, making cooling demand noticeably higher than in surrounding suburban towns. Buildings that never had air conditioning now need it, and ductless mini-splits have become the default solution.
Our Main Somerville Services
Homeowners in Somerville call us most often for these three jobs, each shaped by the city’s triple-decker housing and heat-island climate.
AC Repair in Somerville
AC repair in Somerville usually means a ductless mini-split that quit during a July heat wave, or a window unit that cannot keep up with heat-island temperatures 8-10 degrees above suburban readings. Our technicians carry refrigerant gauges, leak detection, and replacement compressors for major brands, and we stock parts for Trane and Lennox systems common in recent condo renovations. Most calls are same-day when the temperature spikes. AC Repair in Somerville
Furnace Repair in Somerville
Furnace repair in Somerville often means an aging steam boiler in a triple-decker basement, or a converted gas furnace struggling with uneven heat across divided units. We see failed igniters, cracked heat exchangers, and zone valve failures weekly in Winter Hill and Union Square properties. Our trucks carry replacement parts for Goodman and Rheem systems, and we issue a written 365-Day Done Right Promise before leaving every job. Furnace Repair in Somerville
AC Installation in Somerville
AC installation in Somerville almost always means ductless mini-splits, not central air. The balloon-frame construction and shallow joist bays in 1890s triple-deckers make ductwork retrofits impractical. We size each floor separately, mount outdoor condensers on fire escapes or rear porches, and run refrigerant lines through exterior walls. Every installation gets a written fixed price, a scheduled install date, and rebate paperwork handled. AC Installation in Somerville
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Somerville
Our technicians train on nine major residential HVAC brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. We stock common control boards, capacitors, and refrigerant valves for Trane, Lennox, Goodman, and Rheem in our Boston-area parts room, so most Somerville repairs do not wait on shipping. our brands
Pricing for HVAC Company in Somerville, MA
| Service | Typical range in Somerville |
|---|---|
| AC Repair | $150-$650 |
| Furnace Repair | $150-$700 |
| AC Installation | $3,500-$7,500 |
| Tune-Up | $80-$200 |
Prices in Somerville run toward the higher end of these ranges when condo conversions require electrical panel upgrades to handle added mini-split loads, or when oil-to-gas conversions need new venting through historic masonry. We give you a written price before any work begins, and that number does not change at the door.
Neighborhoods We Serve in Somerville
Our crews work across Somerville’s full footprint, from the dense triple-deckers of Winter Hill to the converted industrial lofts near Assembly Square. Most Somerville addresses fall within a 30-minute response window during business hours.
- Winter Hill
- East Somerville
- Union Square
- Davis Square
- Teele Square
Service Area – Cities Near Somerville
Dispatch and scheduling are coordinated from our Boston office, with crews serving Somerville locally and reaching into surrounding communities. We regularly take calls from Cambridge, MA, Medford, MA, Boston, MA, and Everett, MA for both emergency repairs and scheduled installations.
Serving Somerville, MA - Our Local Coverage Area
We’re based in the Somerville area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About HVAC Company in Somerville
Most Somerville emergency calls reach a technician same day, and our phones are answered by a live person 24 hours a day. Call (817) 402-2972 for an exact arrival window.
Yes, separate utility metering and mechanical permits are typically required when splitting a shared boiler into unit-specific systems. We handle permit paperwork as part of the installation scope.
Practically speaking, no. Balloon-frame walls and shallow joist bays make ductwork retrofits prohibitively expensive. Ductless mini-splits are the standard solution we install instead.
What happens when you call
- 1A real person answersNo phone trees - talk to a local hvac pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Somerville Customers Say
"The repair was done well and quickly. Scheduling over the phone was a little clunky and I got transferred twice, but the tech himself was great and on time."
- Brett Haygood"Furnace was short cycling all winter. They diagnosed a bad sensor instead of condemning the whole unit like I feared. Cheap fix, honest call."
- Russ Tiedemann"Thermostat and a weak blower. Fixed both in one visit, explained the guarantee, and didn't leave a mess. I've already recommended them to my neighbor."
- Natalie Esposito