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Typical Greater Boston range for this kind of work, from regional averages — not a quote from St Jean 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
Twenty years of heating and cooling out of a PO box in Wilmington, run by Ray St. Jean with three people on the books. The BBB dates the business to May 2006, records its incorporation as an LLC in 2016, has accredited it since January 2008 and grades it A+. What they do is specific. Residential and light-commercial heating and cooling — boilers, forced-air furnaces, heat pumps and high-velocity air conditioning — with a particular line in ductless mini-splits for houses that have no ductwork or registers, plus furnace and water-heater repair. The BBB lists Buderus among the product lines they carry. The HomeAdvisor listing is the thing to read before calling: it states the pro is new there with no reviews yet, and its FAQ says the company offers no free estimates, no emergency service and no warranties. Nothing on file here rates the actual work, which is why no score is published on this page. A reasonable call if you are pricing a mini-split or a boiler and want a long-established, accredited local shop. Ask what the estimate visit costs before booking it, and what warranty comes with the equipment itself.
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No changes recorded yet — last scanned Aug 1, 2026.
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