T40 roof fan

The roof fan has many specifications and a wide range of applications. It can be used according to the different requirements of the use occasion, air volume, pressure and noise.
Roof fans have the following three types of fans A. Axial-flow roof fans: Model DWT-I, suitable for medium and low pressure, large flow applications. According to user needs, it can also be designed into two-way reversible air supply and exhaust, that is, a fan with equivalent characteristics of positive and negative working conditions, such as DWT-Ⅴ; B. Centrifugal roof fan: Models are DWT-Ⅱ, DWT-Ⅲ Two types, suitable for occasions with small air volume and high pressure requirements; C. Motorless turbo exhaust fan: Model DWT-Ⅳ, which is a special arc-shaped blade that is driven by the difference between indoor and outdoor air pressure to rotate with the axis An ideal energy-saving ventilation device for exhausting indoor air.