Verified record
Energy Unlimited, LLC Heating & Cooling says on its website that it has been in business for 19 years and serves Tilton, Belmont, Northfield, Laconia, Franklin, Gilford, Meredith, Loudon and other nearby towns. Mark G Piechowicz holds New Hampshire HVAC license GF2011018, which is active on the state registry. A 2022 Google customer said the furnace in a house they had just bought was on borrowed time, and that after getting three proposals they went with Mark, who was the most reasonable in price and easy to talk to. That 2022 customer said the crew showed up on schedule, kept them informed of their progress and was done in two days. The same 2022 review said they cleaned up, took all the trash and gave the system a thorough test, and called the installation neat and organized.
The furnace in a house we just purchased was on borrowed time. I knew it wouldn’t be cheap to replace it but also knew we must. After getting three proposals, the decision made itself. Mark was the most reasonable in price and was straightforward and easy to talk to. The timetable was agreeable and the crew showed up on schedule. They were personable, communicated well and kept me informed of their progress. They made it look easy and were done in two days. The installation is neat and organized and makes sense visibly. They cleaned up, took all the trash and gave the system a thorough test. The system is amazing and my wife and I are thoroughly pleased.
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1 change recorded — last scanned Oct 18, 2026.
Typical your area range for this kind of work, from regional averages — not a quote from Energy Unlimited, LLC Heating & 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
Explanations during oil-to-gas conversion5.0
A same-day boiler visit4.8
Evening furnace call answered within 30 minutes4.6
Mini split installed in a single day3.4
State-verified HVAC license since 20102.9
Boiler repair a few hours after a text4.5
