The electric heater of air duct is mainly used for air heating in air duct. The specifications are divided into three forms: low temperature, medium temperature and high temperature. The common structure is that the steel plate is used to support the electric heater to reduce the vibration of the electric heater. The overtemperature control device is installed in the junction box of the frame heater. In addition to over-temperature protection, intermodal transport device is also installed between the fan and heater to ensure that the electric heater must be started after the fan starts, and a differential pressure device is added before and after the heater to prevent fan failure. The gas pressure of the channel heater should generally not exceed 0.3Kg/cm2. If it needs to exceed the above pressure, the low-temperature type heater should be selected. Heater gas heating ** temperature does not exceed 160, medium temperature type does not exceed 260 and high temperature type does not exceed 500. Wind pipe electric heater, wind channel electric heater is used in industrial air duct, air conditioning air duct and various industries through the heating of air, improve the temperature of the output air, generally inserted in the horizontal opening of the duct. According to the working temperature of the duct, it can be divided into low temperature, medium temperature and high temperature; according to the wind speed in the duct, it can be divided into low wind speed, medium wind speed and high wind speed.

Wind channel electric heater has been widely used in many scientific research and production laboratories, such as aerospace, weapon industry, chemical industry and universities. It is especially suitable for automatic temperature control and large flow high temperature combined system and accessories test. Electric air heater can be used in a wide range of applications: any gas can be heated, resulting in hot air drying no moisture, no conductivity, no combustion, no explosion, no chemical corrosiveness, no pollution, safe and reliable, heating space quickly (controllable).