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R.A. Desmarais & Son, Inc. is described on its BBB page as engaged in the sales, service and installation of heating, air conditioning and refrigeration, and that page gives it an A+ grade. The company's own website lists 24/7 emergency service. A 2023 customer said that when their furnace died, the company returned their call quickly and gave a no-pressure estimate and an honest assessment of their options. That 2023 customer said the installation was done quickly and all their questions were answered. In 2024, a customer described the technical staff as professional, knowledgeable, friendly and trustworthy. A 2022 Google reviewer gave two stars and called the company slow and unresponsive, while giving a thumbs up for allowing refunds.
“Until the big move in the fall, they will continue renovations with the help of Legacy Mechanical Plumbing, Irish Electric, R A Desmarais & Son and North Branch Construction.”
Typical your area range for this kind of work, from regional averages — not a quote from R A Desmarais & Son. 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
This company is the most professional company I have dealt with in a while. Technical staff is professional, knowledgeable, friendly and trustworthy.
When my furnace groaned and grunted and died in April I was panicked, and after several terrible used car salesman type estimates by the big name companies, thankfully a friend recommended I call RA Desmarais. I did so immediately and I received a friendly and fast return call and a no pressure estimate and honest assessment of my options. It was an easy decision to go with them due to both their pricing and their friendly, no pressure, honest and kind approach. The office staff, the installers and the owner have all been beyond exceptional. If I could give them a 10 stars review I would. The installation was done quickly, all my questions were answered, and the friendliness and professionalism of everyone working for RA Desmarais has me recommending them to everyone I know. Thank you for making an otherwise stressful time, so much easier.
Slow and unresponsive. Thumbs up for allowing refunds though!
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1 change recorded — last scanned Oct 18, 2026.
Plumbing diagnosis5.0
Explanations during oil-to-gas conversion5.0
Knob and tube wiring removal5.0
Evening furnace call answered within 30 minutes4.6
Next-morning furnace fix4.0
Stayed late to finish a boiler install3.8
