Since 1983 Mesa Energy Systems, Inc. (dba EMCOR Services Mesa Energy), a subsidiary of EMCOR Group, has earned a reputation for providing value to our many satisfied customers through high-quality consulting services and efficient, cost-effective, customized installation solutions.

Building Automation, Retrofit & Commercial HVAC Contractors

We are more than just an HVAC repair contractor. We are a full-service HVAC, building automation systems, energy services, chiller services, and retrofit contracting company serving California, Arizona, and Nevada. 

Industrial and Building Energy Consultancy & Services

We provide customers with high-quality industrial and building energy consulting and services that address today's most difficult and pressing energy-related issues, including CFC phase outs, the deregulation of electricity, LEED and Energy Star ratings, and federal energy savings mandates.

With the latest equipment in advanced, state-of-the-art diagnostic and automated control technologies, we minimize the cost of operating building environments without sacrificing occupant comfort.

Our Services

  • Mechanical Maintenance
  • Service and Repair
  • Building Automation Systems
  • Commercial Refrigeration Repair
  • Chiller Service and Installation
  • Mechanical Retrofit Services
  • Design/Build
  • Tenant Improvements
  • Energy Efficiency Studies and Upgrades
  • Indoor Environmental Quality
  • Demand Response
  • Renewable Energy
  • Retrocommissioning
  • Energy Star Partner
  • LEED Certification Support (Member USGBC)
  • Demand Control Ventilation
  • Utility and Special Program Rebates for Energy Efficiency Upgrades
  • Performance Contracts
  • Energy Reduction Strategies
  • Smart Grid

Our Markets

  • Healthcare
  • Commercial/Industrial
  • Education
  • Sports and Entertainment
  • Retail
  • Government
  • Data/Call Centers
  • Financial Services
  • Telecommunications
  • Pharmaceutical
  • Biotech
  • Semi Conductor

Please visit the links on the left to read more about each of our services and to learn what Mesa can do for you.