Air-conditioning and refrigeration mechanics install, maintain and repair heating, cooling and refrigeration systems and equipment. They may install ducted air-conditioning in a family home, or build large walk-in refrigeration units for businesses needing mass food storage. They bolt and build units into buildings with brackets, piping, gas and water lines, cabling and wires. Following pre-set specifications, they use motors, pumps, filters, switches and gauges to put together the heating or cooling system that is required for the job.
In WA, air-conditioning and refrigeration mechanics are mainly employed by installation service maintenance and manufacturing firms that service shops, hotels and factories. Others can find work with firms that specialise in cold storage, food treatment plants and refrigeration on ships.