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Santa Clara:
(408) 980-1711
(916) 344-1711
CCL No. 422478

ESI History of Exceptional Service


Environmental Systems Inc., has evolved as a leader in cutting edge technology, while keeping pace with the ever changing HVAC and energy management environments.  We keep in mind, the basic goals of customer service and satisfaction.This formula has enabled our company to grow steadily since its founding in 1975. ESI has been a consistent force in the plan and spec market, as well as proving our capabilities in design/build-negotiated projects. ESI handles projects, large and small, with equal care and commitment to excellence.

ESI History

Heading the firm is President and CEO Chris Enfantino. Responsible for all operations of ESI Chris Enfantino integrates corporate management with construction management. Co-owner and CFO Gene Enfantino, compliments the relationship, overseeing all of the company's finances.

Together, Chris and Gene Enfantino have assembled a team of experienced professionals, both in the office and in the field to provide a full spectrum of mechanical contracting services.

Environmental Systems Inc., is fully licensed to operate as a ‘prime contractor’ to expedite projects to completion. The prime contractor designation ensures ESI’s clients a smooth project time table from start to finish. The company holds C4, C20, C34, C36, C38 and B licenses. This allows ESI's project management team to get involved from the ground up; coordinating architectural, engineering, HVAC, piping, and building automation and energy management.

Two Offices to Serve You!

Our goal is to serve as your complete mechanical contractor. With two offices and five divisions, the company can cover  all aspects of a project's mechanical and energy requirements. ESI's corporate office is in Santa Clara, CA and a our second location in  Sacramento, CA allow us to service clients in the entire northern and central California region.