A professional who repairs and installs cooling units to draw air over moistened pads, using handtools and portable power tools. Responsibilities include:

• Disassembles, cleans, and oils parts.
• Replaces motor bearings, aligns pulleys on motor and blower shafts, and tightens slack in drive belts.
• Replaces defective wiring.
• Holds tachometer against revolving centers of blowers and motors to verify specified revolutions per minute.
• Bolts cooler to window or platform adjacent to window, following layout lines.
• Cuts and installs plywood or building board to fit vacant window space.
• Installs electrical outlets and thermostat or humidistat controls.
• Cuts and connects tubing to cooler and water source.
• Adjusts rate of water flow.
• May install cooler on roof and assemble prefabricated sheet metal ducts in attic.