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FMK Heating and Cooling says on its website that it is family owned and has been servicing clients in Vermont since 2005, taking on plumbing, heating and cooling jobs. On Google it holds a 4.9 average from 174 ratings. A 2025 customer said Joe installed a Bosch heat pump/AC and the attic duct work that went with it. A 2025 reviewer said Joe and his team converted their heating system from oil to propane, from the first estimate to the completed installation. At a property in South Hero, a 2025 customer said Joe, the owner, was the technician for maintenance checks on a direct vent gas fireplace, a gas stove, a central gas heating unit and a gas workshop heater. A 2025 customer wrote that at a summer home on the lake, Joe repaired one bathroom, remodeled the other from the studs out, replaced the boiler heating system and installed a tankless hot water tank. A 2025 customer said Brian came to see the setup for a new gas range and came back the following week to add the gas line. A 2024 customer said FMK came out the next day to diagnose and fix a broken valve after baseboard water heaters in one zone stopped working. A 2026 customer said a technician dismantled their boiler and said a valve needed replacing, then weeks went by with no update; they were charged $150 and said no service was performed. A 2026 customer said furnace parts were delayed again and again until after Christmas with little contact from the company, while they received at least five requests to leave a review. A 2025 customer said a heat pump install was left unfinished for months, and that the business reimbursed them and removed the system only after they threatened to sue. In a November 2023 r/burlington thread, a commenter linking to the company's website wrote of their plumber, Joe: "Super nice guy, does great work."
“FMK Heating & Cooling. Do not recommend.”
“We love our plumber, Joe. Super nice guy, does great work: [https://www.fmkvt.com/](https://www.fmkvt.com/)”
Contacted FMK to have our boiler serviced approx December 20th. Technician arrived and dismantled and said a valve needed replacing and would wait to see if there was a warranty on the part. Emailed FMK two weeks later (Just after Jan 1) about an update and was told they were still waiting on an update. Now it is 2/12, no email, no update. I have emailed at least twice. No contact. I was charged $150 which I paid promptly, but no service was performed.
They called back immediately when I left them a message and showed up the next day to inspect my furnace. He told me that I would need about $300 in parts that they had to order, and would be here Monday. They would give me a call by Tuesday at the latest and we would schedule something for the end of the week. Tuesday night, I called and asked for an update after not hearing from them. They called me Wednesday morning, saying the parts were delayed, but would be there that day or the next, and they would call me by Thursday. Thursday night, after no communication, I texted them asking update. They texted back that the parts were still late and they would be here Monday, and they would definitely get my furnace repaired by Christmas. It is now the Sunday, three days after Christmas, and I still have not received a call letting me know that the parts have arrived and to schedule service, my furnace is still not working properly. The only time I receive any communication from them is asking me to submit a review and give them a great review so they can be the top rated service in Fairfax, even though they've done no work for me. They've only been here to look at my furnace and give me the runaround waiting for parts. But they are constantly asking me to leave them a review. I've received zero calls from them that I that aren't returning a call from me, but I have received at least five unsolicited requests to leave them a review. So here's the review. Edit: Oddly enough, Joe sent an email immediately after I left this review, saying that the part we've been waiting 2.5 weeks for arrived yesterday and he wanted to schedule the repair tomorrow. Once again, zero communication unless I make the first move. I do not trust him to repair my furnace now.
Joe with FMK Heating & Cooling was great to work with. He installed a Bosch heat pump/AC and associated attic duct work for me. High quality work, thorough, and attention to detail. Courteous and pleasant to deal with. Responsive to questions and concerns. Would recommend highly.
Great service, lovely people. Trustworthy.
Furnace was not working properly. They came within 2-3 hours after calling FMK. Very knowledgeable about my problem and explained everything. Would highly recommend this company and will have them do the furnace cleaning they recommended.
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Certified attributes are verified against the public registry. Others are the business's own statement.
1 change recorded — last scanned Oct 23, 2026.
Typical your area range for this kind of work, from regional averages — not a quote from FMK Heating and 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
Breaker call answered within half an hour4.4