... inside.Intake and exhaust system(2 sets): Inlet: 2 sets, in total 4×7.5KW double-intake centrifugal fans, model ... air capacity is 21000m3/h for each fan; Outlet: 2×11KW double-intake centrifugal fans, with motor outside, belt-drive, ... Spraying, heat spraying, baking, time setting, lighting switch, failure indicator, thermostat, power supply switch, emergency stop, ampere meter, voltmeter,hours meter ...