HCL Mechanical Services, LLC (HCL) was created in March 2005 to serve as a plumbing service option for projects completed by ... Humphrey Company, Ltd. HVAC was added in 2013 and since HCL has evolved into a full service mechanical company providing service maintenance and new construction in Plumbing, Medical Gas Systems, Process Piping, HVAC, Fuel Oil Systems, Building Automation, PM Programs, Process Refrigeration, Ammonia/Absorption Refrigeration and more. Our customers include those from the healthcare, research and development, commercial, and industrial markets. For more information call (713)586-8140. Visit our website at www.hclmechanicalservices.co read more