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Verified record
License Verified10169-SM-M1MA hvac · verified Sep 22, 2026
- MA HVAC licenseVerified active
- Not rated by the BBB
- 17 work photos
Highlights
- Same-day repairs — showed up quickly for a leak, heat failure and AC outage
- Fair, honest pricing — one reviewer called him honest and fairly priced
- Active HVAC license — registry-verified for the company
Koval Plumbing, Heating and Air Conditioning is a Tyngsborough, Massachusetts contractor whose Google reviewers keep naming the same person: George, who calls back and shows up the same day. In a 2019 review, a small-business customer in Tyngsboro said George called back the same day and fixed a water leak quickly at a price they considered fair; in a 2018 review, another customer called him honest and fairly priced, someone they could depend on for quick responses. In 2015 and 2016 reviews, customers described George coming out the same day for a family member's heating failure and for a weekend plumbing call. The company's Massachusetts HVAC license, 10169-SM-M1, is active, with George W Koval as the registry's holder of record. Koval fits a homeowner with a plumbing or HVAC repair who wants direct, same-day contact with the person doing the work; the written reviews on file run 2015-2019, so it's worth asking about current availability before booking.
What does heating and cooling work cost in Greater Boston?
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Koval Plumbing, Heating and Air Conditioning Inc. 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
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