24 hours/365 days

  • Emergency Service & Deliveries
  • Repairs
  • Installations
  • Highly Trained Technicians
  • Competitive Pricing
  • Automatic Delivery
  • Fixed Heating Oil Rates
  • Skilled, Reliable Drivers
  • Service Plans
  • Eco–Friendly Options

About Us

ThermOil, Inc. offers an extensive range of Heating, Cooling, and Plumbing services to clients throughout Eastern Massachusetts, and has earned a reputation for professional, highly–trained staff; quality products, and constant dedication to our founding principle: Do It Well – Do It Once.

We are committed to bringing our clients exceptional, cost–effective solutions that both reduce start–up costs and trim expenses over the life of our products.

And we’re proud to have a long history with industry leaders in the heating, cooling and plumbing field: manufacturers who share our focus on providing the latest, most effective technology to our clients. Through these trusted vendors, we provide quality products that will serve our customers for years to come — we guarantee it.


Angelo Pistoftzian, Owner and President, established ThermOil in 1983 to meet a rapidly growing need for a reliable provider of heating oil and boiler services in Watertown and the surrounding area.

With Bachelors and Masters degrees in Chemical Engineering from Northeastern University, and years of practical experience, Angelo combines an in–depth understanding of fundamental principles with a hands-on approach to daily operations. Angelo oversees every project from start to finish, and makes personal visits to work sites a priority.

Over the last 25 years, ThermOil has expanded from a local heating oil business into a regional incorporation offering Heating, Cooling, and Plumbing services to clients throughout Eastern Massachusetts.

Our motto is also our business model, and underscores our promise to provide
Total Customer Satisfaction.

Professional Affiliations

ACCA logo

Air Conditioning Contractors Of America (ACCA)

ACCA is the largest association of HVACR contractors and the preferred service provider for members in all 50 states and worldwide.