Works with Air conditioning units, unit heaters, controls, wire, gas, appropriate hand tools, compressors, motors, contactors, belts, filters, pipefittings, gaskets, tubing, oil, freon and other material needed, mobile equipment, pick-up, all other equipment, and necessary safety equipment. Must be able to climb, balance, stoop, kneel, crouch, crawl, reach, stand, walk, push, pull, lift, carry, finger, grasp, feel, talk to communicate, speak over public address system, hear, and make repetitive motions.