Air conditioning Pumping machinery Air-compressors 2 Bearings (Machinery) 2 Boilers 2 Combustion 2 Condensers (Steam) 2 mere ... Design and construction 2 Equipment and supplies 2 Heat 2 Heating 2 Piping 2 Power-plants 2 Purification 2 Ventilation 2 Actuators 1 Air conditioning from central stations 1 Ash disposal 1 Automatic control 1 Belts and belting 1 Brakes 1 Centrifugal pumps 1 Cleaning 1 Clutches (Machinery) 1 Combined cycle power plants 1 Condensers (Vapors and gases) 1 Control 1 Cooling 1 Cooling towers 1 Corrosion and anti-corrosives 1 mindre ...