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JG Heating LLC is a heating service working in Southern Maine, by its website's account, and it advertises 24/7 emergency service. It holds 5 stars from 10 Google ratings. A recent customer said JG gives a clear description of what needs to be fixed or replaced and, once given the go-ahead, gets it done in short order. In a 2026 review, a customer said JG Heating arrived the same day and diagnosed and repaired the issue within hours. A 2025 customer said Jameson reinstalled one Rinnai and fixed a second one they had been ready to replace, saving them thousands of dollars. A 2025 customer who needed a new furnace coil said Jameson came for a free estimate and finished on time, below his own estimate and far below a competitor's. A 2025 customer with a pressure problem in a tankless hot water heater and boiler said other companies would not flush or replace the coil, that Jameson judged it the best fix, and that it was very cost-effective. A 2025 customer was connected with Jameson by Conroy's Oil for a furnace cleaning and later called him when a pipe on the furnace started leaking; that customer said he fixed it quickly. In a 2024 review, a customer said he helped get the hot water going and cleaned the furnace.
JG is Sharp, he gives a clear description of the things needing to be fixed or replaced. Give him the go ahead and he gets it done in short order.
JG heating LLC saved me and my house in a pinch by arriving same day, diagnosing and repairing the issue within hours. What else can I say??? Simply the best!
Conroy’s Oil, who I get my oil through, connected me with Jameson when I called them asking about furnace cleaning. Jameson came out to service my furnace, was responsive to my questions, and explained what he did. Recently, a pipe on my furnace randomly started leaking, so I called Jameson. He was great to communicate with and was able to fix the issue quickly! Jameson is professional and kind, I highly recommend JG Heating
Jameson did an excellent job reinstalling one Rinnai of ours and fixing a 2nd Rinnai. We had thought it broken and were ready to buy a new one- but through his hard work and dedication he was able to solve the issue and save us thousands of dollars! I would highly recommend JG Heating for any of your heating needs.
I highly recommend JG heating! I needed a new coil for my furnace. Jameson came for a free estimate, explained the situation to me clearly and completed the job on time, below his own estimate and far below that of his competitor. Take a look yourself!
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2 changes recorded — last scanned Oct 30, 2026.
Typical Maine range for this kind of work, from regional averages — not a quote from JG Heating LLC. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$4,500 – $10,300
Typical HVAC project around $7,400
Seasonal home opening and closing4.7
Burst water tank fixed by noon4.5
Transparent pricing4.3
