Verified record
Elvis Cumini is the person DE Mechanical customers deal with, and he has come out at night and on a holiday. In July 2026, a customer whose State/Takagi tankless water heater he had descaled and fitted with a new flame sensor lost hot water later that day; they called at 9:30 p.m., he arrived 20 minutes later, cleared a filter clogged with loosened scale, and had it running in about half an hour. A January 2026 customer said he came once on a holiday so the family had hot water in winter. DE Mechanical describes itself as a Norwood plumbing, heating and air conditioning contractor serving Boston, Needham, Wellesley, Newton, Dedham, Westwood and nearby towns, with 24-hour emergency service. Its Massachusetts plumber licence is active on the state registry. Google shows 4.5★ from 33 ratings. Much of the work is heating conversions and boilers. In July 2026, a customer said Elvis and his team converted their home from oil heat to a two-zone central air system, removed the old furnace and cleaned up the old piping, and kept them informed throughout. A September 2025 reviewer had a new boiler installed within days, with the surrounding piping updated, and in a November 2024 review, a customer said he stayed on a circulation problem caused by rusty debris in 52-year-old baseboard piping until it was solved. In July 2023 he replaced an old oil boiler with a gas one in two days, and in April 2024 one customer had a Viessmann tankless water heater installed while another had a Viessmann boiler and heater combo put in for less than other plumbers' estimates. In July 2026 a reviewer wrote that the job was terrible and there were still leaks everywhere, and in September 2026 another called the company unreliable after waiting several days without hearing back.
Unreliable! I’ve waited several days to hear back from them without response. I do recommend this business.
Had a great experience with Elvis and DE mechanical for an HVAC service. They were prompt and honest to make the process go seamlessly and didn’t attempt to sell anything extra. Highly recommend.
Elvis from DE Mechanical serviced our 6.5-year-old State/Takagi tankless water heater and was so user-friendly to work with. He performed a descale, maintenance, and replacement of the flame sensor. At the end of his initial visit in the morning (he arrived promptly when he said he would), Elvis did a test run to ensure the hot water was working, which it was. However, the unit stopped producing hot water later the same day. I called Elvis at 9:30pm, he came to our house 20 minutes later, diagnosed a clogged filter caused by the loosened scale, cleaned it, and had the system running fine again in about a half hour. I appreciated both his technical knowledge of tankless water heaters and his willingness to come back immediately to make sure everything was working correctly for us. I would use DE Mechanical again, and recommend Elvis.
Elvis and his team did an outstanding job converting our home from oil heat to a two-zone central air system, with one unit in the basement and one in the attic. The installation had minimal impact on the rest of the house, and they even removed the old furnace and cleaned up the old piping, leaving everything neat and tidy. Elvis kept me informed throughout the entire process, explained what was happening, and asked for my input whenever decisions needed to be made. He and his partner were professional, respectful, efficient, and always on time. The quality of their work and attention to detail were excellent. I highly recommend Elvis and his team to anyone looking for HVAC or plumbing work!
Did a terrible job, leaks everywhere still
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Service area
1 change recorded — last scanned Sep 8, 2026.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from De Mechanical LLC. 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
Languages
Languages
Fast emergency response4.9
Panel upgrades4.8
Navien expertise4.7
Water heater swaps4.4
Power-vent conversions with new gas lines3.5
