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What Makes GHC the Most Dependable in the Business?

  • Expertise you can trust: The current GHC Union Trained Technicians have worked here for over 14 years on average.
  • MSCA Star Qualified: Exceeding stringent testing requirements through Local 597, we are proud to be among the best trained companies in Illinois.
  • Advanced diagnostic tools: Every GHC tech follows our 14-point inspection process and uses the latest diagnostic tools to quickly solve problems.
  • Proven track record: GHC has been an industry leader for over 50 years, over 10,000 successful service calls last year.
  • An industry-leading number of call-backs (0.06% of all service calls were call-backs).
GHC Technicians Working on Outside HVAC Unit


7 years

All journeymen have at least 7 years of experience


10,000 service calls

More than 10k successful service calls in 2023


14-point process

Every tech follows our 14- point process