ThermOil, Inc.
Heating oil, HVAC, cooling, plumbing and water-heater services in Belmont and Eastern Massachusetts
Belmont / Watertown, Massachusetts · Research reviewed October 10, 2026
Google customer rating
4.8/5
39 Google reviews
BBB letter grade
A+
Exact ThermOil business record reviewed
Complaint context
0 complaints displayed
Individual BBB complaint record reviewed
Why this company qualified
The exact BBB record, direct Google Maps listing and official website align on the ThermOil name, telephone (617) 926-0779 and thermoilenergy.com domain. BBB lists a Watertown mailing address; Google lists the Belmont service location at 766 Pleasant Street, and the official site identifies Belmont.
Google displayed a 4.8/5 customer rating from 39 reviews when directly checked on October 10, 2026. BBB displayed a current A+ letter grade for the matching record.
Services verified
The official site describes heating-oil delivery, heating repair and maintenance, central and ductless cooling, heat pumps, residential and commercial plumbing, conventional and tankless water heaters, and indoor-air-quality services.
Complaint context
The individual BBB complaint page displayed zero complaints when reviewed. Complaint volume and ratings can change and do not predict future service.
Research sources
Ratings and public records can change after the review date. NHA Gold is an editorial recognition based on the stated evidence, not a guarantee or endorsement by BBB or Google.