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Mass Mechanical's website says the company has been in business for 30 years. A 2026 review says Mike came by to fix a barely functioning central AC, which turned out to be a layered issue, and that the air is now cold. A 2025 review says Mass Mechanical installed the reviewer's Trane whole house air conditioning unit around 30 years ago and that, with yearly maintenance, the unit is still going. A 2021 review said Mass Mechanical installed the reviewer's original system and then an upgrade 20+ years later. A 2021 review said that after the reviewer lost heat and emailed after 6pm, Rick replied at 6am that someone would be there that morning, and the technician called at 7:30am to say he was on his way and then fixed the system. A 2016 review said the reviewer needed to replace an 18+ year old HVAC system, and that the Mass Mechanical bid was less than the other bids and proposed higher end, more energy efficient Trane units. A 2016 review said the home had a half basement and that the team worked hard and was communicative and friendly.
Typical your area range for this kind of work, from regional averages — not a quote from Mass Mechanical Co Inc. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$5,000 – $11,400
Typical HVAC project around $8,200
Mike came by yesterday to fix barely functioning central AC. It turned out to be a layered issue that could easily have been missed by someone not as competent and thorough. Air now cold as the Arctic! Thanks Mike!
Mass Mechanical installed our Trane whole house air conditioning unit around 30 years ago. With yearly maintenance, our unit is still going. A testament to the maintenance crew and for the recommendation and installation of a system that would last over time. We chose them because they had the best plan for cooling the whole house.
Mass Mechanical installed our original system, then an upgrade 20+ years later and did a great job! Last night, we lost heat - I emailed them sometime after 6pm. At 6am this morning, I rec'd an email from Rick saying someone would be there this morning - the technician called at 7:30am to tell us he was on his way and would be here by 8am - and then fixed our system. I wish every contractor was this professional, responsive, and performed the level of quality work!
We needed to replace an 18+year old HVAC system. Went out for 3 bids here locally in Wellesley (The L company, the R company, and Mass Mechanical). Not only was the bid from Mass Mech less than the others, he proposed higher end (more energy efficient) Trane units vs. the other bids and they listened to our needs (vs one of the others who tried to sell us a system that was 2x our target budget, even after I explained to them I wasn't interested). Our home has a half basement, so the work was not fun. The team worked hard, was very communicative and friendly, did an outstanding job, and worked with us to have the system operating the way we wanted. Couldn't be more satisfied and highly recommend them.
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2 changes recorded — last scanned Oct 1, 2026.
Multi-zone heat pump design for older homes5.0
Second opinions5.0
Neat installations5.0
Heating upgrades5.0
Active Massachusetts plumber license3.6