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ThermOil, Inc. installs and services heating and cooling systems, with ductless mini splits and heat pumps at the front of its own service list, and the company says it has been in business for 40 years. Its Massachusetts HVAC licence, number 5369-SM-M1, held by Angelo A Pistoftzian, is active on the state registry. A recent customer of twenty years says ThermOil installed central A/C in their home and just installed a new central unit at another property. A recent customer says technician Denilson tuned up and serviced both of their oil boilers, explained what needed to be done, gave options and left the room clean. A 2026 customer said ThermOil installed mini splits in their home and answered their questions patiently. A 2023 customer said that when their oil-burning boiler broke on Thanksgiving, ThermOil came out for an estimate and replaced the unit the following day. A 2023 customer said Angelo came the morning after their furnace failed, and two days later his crew removed the old furnace and installed a new high-efficiency unit. A 2024 customer said they called at 9am and by 1pm the company had visited twice, obtained the correct part and completed the repair. A 2023 customer said ThermOil had done plumbing work and a water heater installation at their first home, and at their new home delivered oil on a schedule based on their consumption. A 2026 customer said diesel was spilled on their walk path on more than one auto oil delivery, with no note or cleanup from the company. A 2019 customer said ThermOil held up their project for weeks, two tubs it installed leaked and caused water damage, and they had to threaten the company to get a purchased boiler installed.
“Since its launch 14 years ago, Walk of Life New England has received support and sponsorship from several large and small businesses, including PROMETRIKA, LLC, of Cambridge; the Dana-Farber Cancer Institute; the Armenian Women’s Welfare Association; Watertown Savings Bank; the Armenian-American Pharmacists’ Association; ThermOil, Inc.; Suphi Furs; Anoush’ella; and the Varjabedian and Bedrosian families; as well as the Armenia Tree Project, Amaras Art Alliance, St. James Charles Mosesian Cultural and Youth Center, the Red Sox, the New England Revolution, Northeastern Hockey, the Waverly Oaks A”
“Since its launch 14 years ago, Walk of Life New England has received support and sponsorship from several businesses, including PROMETRIKA, LLC, of Cambridge; the Dana-Farber Cancer Institute; the Armenian Women’s Welfare Association; Watertown Savings Bank; the Armenian-American Pharmacists’ Association; ThermOil, Inc.; Suphi Furs; Anoush’ella; and the Varjabedian and Bedrosian families; as well as the Armenia Tree Project, Amaras Art Alliance, St. James Charles Mosesian Cultural and Youth Center, the Red Sox, New England Revolution, Northeastern Hockey, the Waverly Oaks Athletic Club and the”
“Since its inception 12 years ago, Walk of Life New England has received support and sponsorship from several large and small businesses, including PROMETRIKA, LLC, of Cambridge; the Dana-Farber Cancer Institute; the Armenian-American Pharmacists’ Association; Watertown Savings Bank; ThermOil, Inc.; and Armenian Women’s Welfare Association;”
“Since its inception 11 years ago, Walk of Life New England has received support and sponsorship from several large and small businesses, including PROMETRIKA, LLC, of Cambridge; the Dana-Farber Cancer Institute; the Armenian-American Pharmacists’ Association; Watertown Savings Bank; ThermOil, Inc.; Quebrada Baking Company; and Anoush’ella (Saj Kitchen); as well as the Armenia Tree Project, Amaras Art Alliance, St. James Charles Mosesian Cultural and Youth Center, and the Armenian Museum of America.”
“Over the past 10 years, the Walk of Life in New England has received support and sponsorship from several large and small businesses, including: PROMETRIKA LLC of Cambridge, the Dana Farber Cancer Institute, the Armenian-American Pharmacists’ Association (AAPA), Watertown Savings Bank, ThermOil, Inc., several other local businesses, the Armenia Tree Project, the Armenian Cultural and Educational Center (ACEC) and the AGBU New England District.”
I've been working with Thermoil for twenty years. They installed central A/C in my home, and I just had them install another new central unit in another property that I have. They work hard and if I have an issue, they call me back and respond and fix what is needed to be fix. They do an excellent job and they clean up after themselves. I highly recommend Thermoil if you are looking for HVAC, heating or plumbing services.
I was EXTREMELY SATISFIED. Denilson the technician was very honest and professional. It was my first time i hired Thermoil to do the tuneup and service of my both oil boilers. I wish i could give 6✨️He called me, he explained to me what needs to be done, gave me options and he left the room clean. DEFINITELY i am going to call them next year. I HIGHLY RECOMMEND this company👏👏👏
Thermoil recently installed mini splits in our home. The team was very friendly and patiently answered all of our questions. Their work was professional, timely, and completed in a clean and organized manner. We’re very satisfied with the service.
I chose Thermoil for an installation through the Mass Save rebate program and had a great experience. The technicians were professional, always on time, and kept everything extremely neat and clean. Anytime I had a question, they took the time to explain things clearly and made the process easy to understand. They stayed on schedule from start to finish, which made the project smooth and stress-free. My wife works from home, and the team was very respectful and kept noise to a minimum so she could continue working without interruption. Overall, an excellent experience and definitely a five-star company. The office staff was also fantastic and very helpful with the loan process and paperwork.
TL;DR- One star for business ethics - Oil spilled on property. Decent price, called the owner a few times and he sounded friendly. However, for the past few oil deliveries, they constantly spilled diesel on my walk path. When it first happened, I didn't notice until the next day after delivery and saw my dog was licking his paw like crazy after our walk and this awful diesel smell on him. Took a good hour or two to clean my dog and the concrete. I first thought it was an honest mistake until it reoccurred the next month after auto oil delivery. Never received any notes from them admitting it or saw attempts of cleaning up their own mess- Like it ain't hard to grab an oil absorption pad while taking that nozzle from the truck to the fill pipe and reverse. Now, after snow just melted, all the diesel they spilled into the soil and sidewalk can be seen running off down the street into the sewage drain. EPA? OSHA? Never heard of them.
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2 changes recorded — last scanned Oct 7, 2026.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from ThermOil, 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
Awkward leak repairs4.2
Heat pump installs with expert ductwork and vents4.0
Handles ceiling-mounted HVAC units few others service3.9
Active HVAC license3.0
Fast emergency response2.9
