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Thermo-Tech LLC. is a heating and cooling contractor in Barkhamsted that describes itself as serving the Northwest Hills of Connecticut with HVAC contracting since 2019. On Google it carries 4.9 stars from 30 ratings. A customer who called in the late afternoon said Bill was there within an hour to service an 89-year-old father's AC during a heat wave, and did not stop until it was working. A customer who had been told to replace a whole AC unit said Bill, brought in as a second opinion, fixed it instead. A customer who had a ductless air conditioner installed said Bill was timely and efficient in scheduling and installation. A customer said he upgraded their system so its settings can be controlled through a cell phone app. A customer who has worked with Bill for many years said he goes over the system and will tell you what can wait or not wait. A 2026 customer said Bill sorted out issues with a heat pump system and handled getting replacement parts under the manufacturer's warranty, which helped keep the cost down. A 2026 customer said Bill replaced a water heater and left the boiler room cleaner than he found it. A 2026 customer whose furnace wasn't running said Bill diagnosed the system and had the needed parts in his van; that customer said Bill is the owner of the company. A 2025 customer said he returned the call quickly and showed up on time to replace a furnace. A customer who had them check out a heat pump install said a quote promised by the end of the day had not arrived three weeks later, even after multiple voicemails. Its Connecticut heating and cooling licence, HTG.0409263-S1, is active under William F Berg.
At the risk of being redundant, Bill was great (again!), willing to explain all of my very neophytical HVAC questions! And as expected, he did an excellent job preparing our HVAC for the winter heating season! Thanks Bill!
Bill is such a professional. We’ve worked with Bill for many years. Personable and Responsive and knows what he’s talking about. He goes over your system so you understand everything. Fair pricing and will tell you what can wait or not wait so you can make the best informed decision. Highly recommend!
Had them come out to check out a heat pump install for my house. They said they’d have a quote to me by the end of the day. 3 weeks past and we haven't heard anything back, even after multiple voicemails. At least just tell us you don’t want the job instead of ghosting us.
Very professional and high quality work.
Bill is the best!!! My #1 go to guy !!!
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2 changes recorded — last scanned Oct 30, 2026.
Typical Connecticut range for this kind of work, from regional averages — not a quote from Thermo-Tech LLC.. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$4,700 – $10,700
Typical HVAC project around $7,700