Environmental Systems, Inc. (ESI) is a premier mechanical contractor & engineering firm headquartered in Attleboro, Massachusetts, with offices in Nashua, New Hampshire, and Warwick, Rhode Island. ESI offers full mechanical services from pre-construction through service and maintenance on all types of HVAC systems throughout New England. In our 45 years in the industry, we have completed design and installation of HVAC systems for more than 10,000 commercial projects, more than 2.5 million square feet of laboratories and clean rooms, and more than 70 MRI facilities, plus projects for many of the colleges and universities in our region.

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Environmental Systems, Inc.

Shawn Elliott

Adam Lariviere

Matthew Regan

Chris Bradstreet

Joseph Vario

Michael Muratori

Jeffrey Briggs

Ed Copes

Walt Sousa

Jenna Lemoi

Jennifer Thompson

Shawn E.

The HVAC and Piping Specialists team at Environmental Systems, Inc. is responsible for the design, installation, and maintenance of HVAC systems, ensuring optimal performance and efficiency in commercial settings. This skilled group, comprising licensed pipefitters, technicians, and foremen, collaborates on various projects—including laboratories and clean rooms—focuses on providing high-quality mechanical services, troubleshooting issues, and delivering exceptional customer service across New England.

HVAC and Piping Specialists

Mechanical Engineering Team

Sales and Estimation Team

HVAC and Piping Specialists

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Mechanical Engineering Team

Sales and Estimation Team