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Smart Climate HVAC is a Stoughton-based HVAC contractor led by Alex, with an unusually deep and consistently strong written record — 73 reviews from 2021 to 2026, the large majority five stars on Google. The company's site states it's a BBB-accredited business with an A+ rating and a member of the Mass Save Heat Pump Leader Network; it handles heating, air conditioning, water heater, and indoor air quality work across the South Shore. The reviews describe a company customers come back to and refer others to. Multiple reviewers say Alex and his crew are responsive from the first quote through completion, provide clear, comparative pricing against several other bids, and leave a genuinely clean job site — one customer specifically noted the crew wearing shoe covers throughout. A recurring theme is heat pump conversions: reviewers describe converting old oil systems, aging gas furnaces, and window AC units to modern heat pumps, several with Alex's help navigating Mass Save rebates worth up to $10,000. One customer describes five years of annual maintenance and a system replacement, calling the company consistently dependable and honest throughout. Two reviews complicate that picture. A June 2026 review describes paying $425 for a furnace tune-up that lasted 10 minutes, only to have the furnace fail completely the following week, with the company describing it as a separate issue and quoting $1,200 more to fix it. A 2025 review describes being asked for payment information before receiving a quote, which the reviewer found unprofessional. For a heating or cooling installation — especially a heat pump conversion — the record here is deep, detailed, and strongly positive. The billing complaint above is worth asking about directly, particularly around what a diagnostic or tune-up visit covers and what happens if a related issue surfaces shortly after.
“These guys were great. Replaced my aged AC system last year, all components, all ductwork. They were prompt and professional. The AC works like a dream now.”
Alex came out for the service call, diagnosed the issue, explained my options, sent me a quote. Once I approved the work, the service was scheduled very quickly. When Illya arrived, he showed me where the new drain line would be installed outside and explained the work that would be done. He estimated it would take a couple of hours, which was exactly what I expected. After the job was completed, he walked me through everything they had done, including installing the new EZ Trap, rerouting the condensate drain line to discharge outside, securing the new piping, and removing the old drain line. The work area was left clean and they did not leave any mess behind. I am very satisfied with their work, professionalism, and communication throughout the entire process. I would not hesitate to contact Smart Climate again for future HVAC services and would recommend them to others.
Good contractor and experience
Smart Climate HVAC provided us with excellent service. We had to replace our boiler at short notice but Alex was able to work us into his schedule and got the work done efficiently and effectively. He is highly professional as is his crew. He answered all of our questions and his pricing was very fair. Thanks Alex!
Smart Climate HVAC charged $425 for a furnace tune-up that lasted 10 minutes. Next week the furnace died completely. Said it was a different issue and wanted $1,200 more to fix it.
Alex is great! Very professional and thorough with his work.
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1 change recorded — last scanned Jul 2, 2026.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Smart Climate HVAC. 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
Navien boiler replacement installed within days4.6
Responsive emergency help4.1
3am emergency pipe-burst response3.5
