Verified record
A difficult third-floor air-conditioning installation and a winter heating-system replacement are among the jobs customers described for St John Heating & Cooling in Google reviews from 2019–2022. In a June 2019 review, a homeowner said Jaime and his team installed air conditioning in a difficult third-floor closet location, with the system cooling both the second and third floors. The customer identified Jaime as the owner and praised his planning, paperwork, responses to scheduling messages, and communication throughout the project. They also said he stayed late on a Friday night to finish. A February 2022 reviewer described an 85-year-old boiler insulated with asbestos that stopped working in winter. They said St John's coordinated asbestos abatement, an inspection, and an electrician alongside its technician and installation crew, then got the new heating system running before the next snowstorm. The customer praised the attention they received from their first call through installation. An earlier review, published in November 2021, described moving and rerunning ductwork during home construction. That customer was pleased with the work and said the team's knowledge helped them decide how to proceed. Google's September 2026 listing gives the business 5 stars from six ratings.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from ST JOHN HEATING & COOLING. 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
Jaime and his team were incredible to work with! Our 85 year old boiler that was insulated with asbestos, stopped working in the middle of winter. From the moment I called St. John’s I was in awe of the attentiveness and customer service I received. From the coordination of the asbestos abatement, inspection, electrician, to their own technician and installation crew. They were professional, kind, and best of all got our new heating system up before the next snowstorm! I would hire them again in a heartbeat and highly recommend their service.
Moved and re-ran ductwork during home construction. Very pleased with the work done and the knowledge they had to help us decide the best way to go about it.
Blue ribbon performance
Jaime and his team installed an air conditioning system for me in a very difficult closet location on the third floor that cools both the second and third floors of my home. Jaime was diligent planning this job with a high level of complexity, prompt with his paperwork, responsive to messages to schedule the work, communicative from start to finish, and stayed late on a Friday night to finish the project. I couldn’t be happier with the work or the service. I highly recommend St John Plumbing and Heating and Jaime, the owner, for his knowledge, professionalism, and kindness.
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2 changes recorded — last scanned Oct 1, 2026.
Transparent diagnostics5.0
Broad plumbing and HVAC range5.0
Repeat, years-long customers5.0
Water heater and boiler installs5.0
Two AC technicians out within a few hours5.0
Mass Save weatherization4.9
