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Seventy-six permitted projects, and the ones on the page are all the same job in the same town: sheet-metal HVAC installs in Lexington — gas- and propane-fired furnaces paired with air conditioning and duct systems, permitted between 2020 and 2022. The business keeps a headquarters address in Chester, New Hampshire and a local one at 8 Ruthven Ave in Middleton, Massachusetts. BuildZoom names John T. Tremblay as the owner. One thing to square before you call: BuildZoom files the business under Architects, while the permits it shows are furnace and duct installation. Ask directly whether the crew that would handle your heating or cooling job is the one behind those Lexington permits. The page also prints a stack of Massachusetts licence numbers — construction supervisor records CS-107887, CS-097047 and CS-096376, a specialty number CSSL-099483, and home improvement contractor registration #155627. Look up whichever one applies to your job on the state's licence lookup before you sign. For a furnace swap or a full duct system this is squarely the work he has been permitted for; get the equipment model and the price in writing.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from John S Tremblay. 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
Specializes in
Also offers
Languages
1 change recorded — last scanned Aug 17, 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