Composition structure: Duct type hot air heater is made of sheath house ( steel alloy, stainless steel ,or other material as your design), finned heating elements, inside with thermal insulators for keeping air temperature, wire connect box, thermocouple, inlet hole, outlet hole, temperature controller, Temperature Controller, Fuse, Overtemperature Control Device etc.
Air duct heaters are designed to heat new or recycled air circulating in industrial processes or in air conditioned buildings, up to 500 kW, 750 V 3-phase, > 300 °C.
They are equipped with U-shaped or finned heating elements mounted in a protected steel or stainless steel case or on a mounting plate. A safety device (thermostat, PT100 sensor or thermocouple) limits the temperature.
An IP30 to IP55 electrical cabinet, in steel or stainless steel, protects the connections of the heating elements for connection to the power supply and safety devices with the power cabinet.
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