Refrigeration and air conditioning mechanics install, maintain, repair and overhaul residential central air conditioning systems, commercial and industrial refrigeration and air conditioning systems and combined heating, ventilation and cooling systems. Transport refrigeration mechanics are included in this unit group.

Example titles: central air conditioning mechanic; commercial air conditioning mechanic; heating and cooling mechanic; heating, ventilation and air conditioning (HVAC) mechanic; refrigeration and air conditioning mechanic apprentice; refrigeration mechanic; transport refrigeration mechanic