What does heating and cooling work cost in Greater Boston?
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Fong and Sullivan Heating & Cooling. Use it to sanity-check bids, then get the real number in writing.
Mini-split diagnostics — a refrigerant leak found and recharged inside an hour
Heat-pump corrections — airflow and valve faults fixed on another installer's system
Heat-wave response — AC restored same week during 90-degree stretches
One-day replacements — two-zone and full-system swaps finished by a crew
Options, not upsells — right-sized equipment shown and alternatives quoted
Named technicians — Justin, Matt, Joe and Chris recur across reviews
Active state licence — Massachusetts HVAC registration verified current
Short third-party history — BBB accredited only since March 2026
Unverified directory numbers — five BBB-listed registrations checked by nobody here
Two summers of heat waves run right through this company's reviews — the AC that quit on a 90-degree afternoon, the mini-split that failed over a holiday, the first-floor heat that went out in January. Fong & Sullivan Heating & Cooling works out of Plainville, and its Massachusetts HVAC licence, number 920-SM-B, is active in the state registry under the company's own name. Its BBB page is an A+, accredited since March 2026.
The written history is young and unusually consistent: 121 Google ratings averaging five stars, 113 reviews on file since 2023, and 59 of them posted in the last six months. The detail is what makes it convincing. One homeowner had a leaking LG mini-split diagnosed in about twenty minutes, then repaired and recharged inside an hour, after another company couldn't find the fault. Another had a heat pump a previous installer had badly oversized — static pressure in the ducts was pushing the system into shutdowns — and describes this crew reworking the airflow and replacing a defective valve to get the system doing what it should have done from the start.
Speed and staffing come up constantly. A two-zone AC replacement finished in one day on a 90-degree afternoon, with nobody leaving until cold air was blowing. A full system swap done in a day by a whole crew, then walked through afterwards. Customers name the people who turn up — Justin, Matt, Joe Sullivan, Chris — which is rare at this review volume and points to a small bench rather than a rotating roster. Several describe being shown the properly sized equipment and given quotes for the alternatives instead of a single number.
Two things are worth pinning down before booking. The company is new to the BBB, accredited only since March 2026, so the long multi-year history some homeowners want simply isn't there yet, however clean the last three years read. And BBB lists five separate registration numbers for the business — two Massachusetts consumer-affairs registrations, a building-regulations number and a MassDEP entry among them — which are BBB's own records rather than ones checked here; only the state HVAC licence has been verified against the registry.
For a mini-split or heat-pump problem in Plainville and the towns around it, or an AC failure that needs solving this week, this is a sensible call: the reviews that describe real diagnostics, not just courtesy, keep landing on that work. Confirm which registration covers your specific job if a permit is involved, and get the option list in writing — customers say they were handed choices rather than one price, and that is easier to hold someone to on paper.
I’ve used so many different HVAC companies and finally found one I can stick with. Every time I have booked, they arrive when they said, are thorough, give us available options and guidance, and the final tally has always been reasonable. Can’t say enough good things about them.
I’ve used so many different HVAC companies over 15 years and finally found one I will stick with. Every time I have booked, they arrive when they said they would, give us available options and guidance, and the final tally has always been reasonable. Can’t say enough good things about them, but those are the three that come to mind.