About Us


About Mesa Energy Systems

HVAC Retrofit & Services, BAS & Energy Solutions Company

Mesa Energy Systems provides full-service HVAC service & retrofit, BAS services and energy management solutions.EMCOR Services Mesa Energy Systems celebrated its 25 year anniversary in 2008. We are a licensed HVAC maintenance, service, building automation systems (BAS) services, and commercial HVAC and retrofit contracting company headquartered in Irvine, California. We have 10 local offices serving the greater Los Angeles, San Diego, San Francisco, Sacramento, Bakersfield, and Fresno market areas.  


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, utilizing improved building and mechanical maintenance, ongoing retro commissioning, and favorable ROI energy retrofits.