Insights

Top Employer Large regional mechanical contractor with a 50-year track record and significant project footprint in commercial, laboratory, and MRI environments presents a stable, reputable partner ideal for outsourcing HVAC design-build, retrofit, and ongoing maintenance contracts.

Medical & Lab Focus Extensive experience delivering HVAC systems for laboratories and MRI facilities signals strong capabilities in cleanroom containment, precision climate control, and compliance-driven installations—opportunities for healthcare, research universities, and biotech campuses seeking turnkey solutions.

Regional Growth Geographic presence across New England (Massachusetts, New Hampshire, Rhode Island) with a robust project history offers cross-border expansion potential and joint-venture opportunities with regional developers and educational institutions undertaking campus-wide HVAC modernization.

Financial Stability Revenue scale in the hundred-million range and a long-standing market position provide credibility for large-scale service agreements, long-term maintenance programs, and financing-friendly bids for retrofits and energy-efficiency initiatives.

Tech & Ops Readiness Existing tech stack and modern service orientation indicate readiness to adopt advanced energy management, BIM-enabled design, and cloud-based maintenance platforms—potential upsell of remote monitoring, efficiency upgrades, and integrated commissioning services.

Environmental Systems, Inc. Tech Stack

Environmental Systems, Inc. uses 8 technology products and services including Sage Intacct, WordPress, Shopify, and more. Explore Environmental Systems, Inc.'s tech stack below.

Media & News

Environmental Systems, Inc.'s Email Address Formats

Environmental Systems, Inc. uses at least 2 format(s):
Environmental Systems, Inc. Email FormatsExamplePercentage
FLast@envsys.netJDoe@envsys.net
90%
Last@envsys.netDoe@envsys.net
6%
LFirst@envsys.netDJohn@envsys.net
4%
FLast@esihvac.comJDoe@esihvac.com
99%
LFirst@esihvac.comDJohn@esihvac.com
1%

Frequently Asked Questions

What is Environmental Systems, Inc.'s phone number?

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You can contact Environmental Systems, Inc.'s main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Environmental Systems, Inc.'s stock symbol?

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Environmental Systems, Inc. is a publicly traded company; the company's stock symbol is TSTA.

What is Environmental Systems, Inc.'s official website and social media links?

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Environmental Systems, Inc.'s official website is esihvac.com and has social profiles on LinkedIn.

How much revenue does Environmental Systems, Inc. generate?

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As of August 2026, Environmental Systems, Inc.'s annual revenue is estimated to be $100M - $250M.

What is Environmental Systems, Inc.'s NAICS code?

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Environmental Systems, Inc.'s NAICS code is 3332 - Industrial Machinery Manufacturing.

How many employees does Environmental Systems, Inc. have currently?

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As of August 2026, Environmental Systems, Inc. has approximately 142 employees across 3 continents, including North AmericaAfricaEurope. Key team members include President: B. J.President: M. S.Managing Partner: J. F.. Explore Environmental Systems, Inc.'s employee directory with LeadIQ.

What industry does Environmental Systems, Inc. belong to?

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Environmental Systems, Inc. operates in the Industrial Machinery Manufacturing industry.

What technology does Environmental Systems, Inc. use?

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Environmental Systems, Inc.'s tech stack includes Sage IntacctWordPressShopifyMicrosoft 365Headroom.jsjQuery MigrateElementorDigitalOcean Web Hosting.

What is Environmental Systems, Inc.'s email format?

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Environmental Systems, Inc.'s email format typically follows the pattern of FLast@envsys.net. Find more Environmental Systems, Inc. email formats with LeadIQ.

When was Environmental Systems, Inc. founded?

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Environmental Systems, Inc. was founded in 1974.
Environmental Systems, Inc. logo

Environmental Systems, Inc.

Industrial Machinery ManufacturingMassachusetts, United States51-200 Employees

Environmental Systems, Inc. (ESI) is a mechanical contractor and engineering firm based in Taunton, Massachusetts, with additional offices in Nashua, New Hampshire, and Warwick, Rhode Island. The company provides comprehensive HVAC services that cover every project phase, from design and pre-construction through installation, service, and ongoing maintenance across New England. Over five decades in business, ESI has completed more than 10,000 commercial projects and delivered HVAC systems for more than 2.5 million square feet of laboratories and clean rooms, as well as more than 70 MRI facilities.

ESI serves the regional market for industrial and institutional facilities, including colleges and universities, laboratories, healthcare, and other commercial sectors that require complex HVAC solutions. With a mid-sized footprint, the company operates as a mechanical contracting and engineering firm serving the New England region. The firm has received recognition for workplace excellence, including honors as a Top Place to Work in Massachusetts and on the Top Workplaces USA list.

Section iconCompany Overview

Phone number
Stock Symbol
TSTA
NAICS Code
3332 - Industrial Machinery Manufacturing
Founded
1974
Employees
51-200

Section iconFunding & Financials

  • $100M - $250M

    Environmental Systems, Inc.'s revenue is estimated to be in the range of $100M - $250M

Section iconFunding & Financials

  • $100M - $250M

    Environmental Systems, Inc.'s revenue is estimated to be in the range of $100M - $250M

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