Perform preventative maintenance tasks on the following systems: air conditioners, heat pumps, gas furnaces, pumps, steam, and hot water boilers, cooling towers, air wash systems, evaporative coolers, air compressors, exhaust fans, blowers, VAV and VFDs, computer room A/C, air dryers; to include: water treatment, air-water filters, balancing, alignment, inspection and measurement and cleaning of above systems