風道式電加熱器主要用于風道中的空氣加熱，規(guī)格分低溫、中溫、高溫三種形式，在結構上的共同之處是采用了鋼板支撐電熱管以減少風機停止時電熱管的振動，在接線盒中都裝有溫控裝置。
The air duct electric heater is mainly used to heat the air in the air ducting. It has three models of low tempt, medium tempt and high tempt. One common thing in terms of structure is that they adopt steel plate for supporting in order to reduce vibration of electric heating tubes when fan stops. Connection boxes are fitted with tempt controllers.

      其中低溫型加熱器可直接安裝在風道上，如下圖1，而中溫型、高溫型由于使用溫度較高，與低溫型加熱器采用不同的結構，即在通道外璧至加熱器接線盒之間設置一定的保溫。
Of these models the low temperature heater can directly be installed on the duct as in fig 1. While the medium and high temperature heaters need certain insulation between the outer wall of the duct and the terminal connection box, as they are subjected to higher temperature and adopt a different structure.

       如下圖2、圖3，一方面減少整個通道的對外散熱，另一方面也減少了接線腔內的溫度，因此中、高溫通道加熱器的安裝，必須在通道上先設置安裝框（如圖4）。低、中溫型加熱器采用翅片式電熱元件，高溫加熱器采用管狀元件。
As in fig 2 and fig 3. That way the heat diffusion of the entire ducting is reduced and on the other hand, temperature inside the terminal box is also reduced. That is why medium and high temperature heaters need a mounting frame to be set on the ducting as in fig 4.for their installation. Low and medium temperature heaters have wing shape heating elements and high temperature heater has tubular heating elements.