About Mesa Energy Systems

EMCOR Services Mesa Energy Systems are licensed commercial HVAC contractors headquartered in Irvine, California, and offering HVAC maintenance and service, building automation systems (BAS) services, commercial refrigeration repair, and chiller services.

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We have 10 local offices serving the greater Los Angeles, San Diego, San Francisco, Sacramento, Bakersfield, and Fresno market areas.  

An HVAC Repair Contractor & Energy Solutions Company

Since our establishment in 1983, we have earned a reputation for providing value to our many satisfied customers through high-quality energy management and audit services as well as efficient, cost-effective, customized HVAC design/build and retrofit solutions.  

The recent demands of the marketplace have transformed us into an energy solutions company, assisting our customers in achieving optimal building energy performance and utilizing improved building and mechanical maintenance, ongoing retro commissioning, and favorable ROI energy retrofits.

Visit our service pages  to read more about what we do, or contact us today if you think your business could benefit from a partnership with us.