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Typical your area range for this kind of work, from regional averages — not a quote from AGS Services, 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
AGS Services is a Henniker heating, cooling and plumbing company whose website lists a service area running from Henniker to Concord, New London and Sunapee. The company says it has been in business 35 years. Its New Hampshire license, number MBE0001498, is active on the state registry, held by A.G.S. Services, Inc. The newest Google account is a hard one: a recent reviewer on a 4-house lot wrote that every house has had plumbing, water heater and radiant flooring issues the company won't fix, and that it uses cheap, outdated materials. A 2023 customer reported water leaks and corners cut. A 2021 customer said no one called or showed up for an appointment, and that the office never returned their call. A 2025 customer said AGS replaced their old hot water heater, explained the options without trying to upsell, and that the technicians showed up on time and did a clean job. A 2024 customer said Ken made the choices clear and set them up with a dual speed American Standard furnace. A 2021 customer with a cabin in Antrim said AGS helped with seasonal opening and closing, and that over many visits the techs, usually Jason, were on time. On Google the company holds 3.5 stars from 20 ratings, and its BBB page shows an A+ grade.
Worst installs ever! Do not hire these people! 4 house lot and every one of us has had MAJOR plumbing, water heater, and radiant flooring issues that they won’t fix! They follow state codes which is NOT always manufacturers recommendations and this VOIDS your manufacturers warranty. They use cheap, outdated materials to save a buck and slap on bandaids to “fix” any problems. I’d rather pay out of pocket than ever have these people touch anything in my house again. Save your money and sanity and hire someone else.
AGS helped us replace our old hot water heater, and they were fantastic from start to finish. Everyone we spoke with was super friendly and helpful, and they made the whole process easy. They explained our options clearly, didn’t try to upsell us on anything, and got us scheduled quickly. On the day of the install, the technicians showed up right on time, were really professional, and respectful of our home. They did a clean job and made sure we understood how everything worked before they left. It’s been working perfectly ever since—no issues at all, and we’re so happy to have reliable hot water again! Honestly, it’s hard to find a company that’s both good at what they do and great to work with, but AGS really is. We’d definitely call them again and wouldn’t hesitate to recommend them to anyone who needs HVAC or plumbing help.
I had a lot of unanswered questions about the different options from another local company. Ken made all crystal clear and set us up with a great dual speed American Standard furnace. Will surely go back for more expert help. 👍
Very knowledgeable and everyone I know in town raves about them
Water Leaks, lots of corners cut and all around terrible work , wouldn’t recommend to anyone, if they’re cheap there’s a reason
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1 change recorded — last scanned Oct 23, 2026.
Ten-fixture installation praised by a 2019 customer3.0
Knob and tube wiring removal5.0
Careful system sizing spec'd thoroughly before install3.3
State-verified HVAC license since 2010Not yet rated
No-heat repair with heat flowing again within the hour4.0
Old boilers kept running3.8