ThermOil, Inc.

ThermOil, Inc. has served Belmont and Eastern Massachusetts since 1983, building over four decades of hands-on experience in heating, cooling, and plumbing. The company operates as a Mass Save partner and holds a Mitsubishi Diamond Dealer certification, reflecting specialized training in variable-speed heat pump systems. Their service area spans multiple communities throughout Eastern Massachusetts, with a staffed office handling customer calls during standard business hours and a 24/7 emergency line for after-hours crises.

What distinguishes ThermOil from broader HVAC companies is their dual focus on traditional heating oil delivery and modern heat pump technology. As a Mitsubishi Diamond Dealer, they install and service ductless mini-split systems that qualify homeowners for Mass Save rebates. The company also offers eco-friendly heating oil blends and provides in-house installations for boilers, furnaces, radiant floor heating, and water heaters. Their plumbing division handles residential and commercial gas line work, a specialty requiring licensed professionals in Massachusetts.

Several reviewers specifically named Angelo as the technician who handled their projects. One customer called when their furnace failed, and Angelo arrived the following morning with a crew that removed the old unit and installed a high-efficiency replacement within two days. Another reviewer described working with Angelo and his team during a full home renovation, praising their problem-solving approach and respect for a work-from-home household during installation. A third customer noted Angelo's team completed a mini-split installation while maintaining a quiet worksite.