Overview With over 150 years of experience,?CoolSys is the market-leading indoor environment solutions company. Our full spectrum of best-in-class services includes HVAC & refrigeration installations, remodels, service & maintenance; and energy solutions, including controls and lighting.?CoolSys serves customers in the retail, commercial, food service, educational, healthcare, and industrial markets. Headquartered in Southern California, CoolSys has more than 2,000 highly trained, field-based service and installation experts, serving more than 45,000 customer locations across North America...  more ->