Electric pedal and fan combination, when installing the fan, pay attention to keeping it in a horizontal position. The weight of the return air duct and valve should not be placed on the housing. Selection of the fan type should

Based on the air volume and pressure loss of the inlet air system, determine the air volume and pressure loss to be calculated separately when determining the fresh air volume during clean ventilation and the air volume during toxic ventilation.

New air volume and corresponding pressure loss at that air volume. If clean ventilation and air filtration ventilation share a single fan, the fan should be sized based on the combined air volumes and their respective pressure losses.

Select a fan for power loss; if clean ventilation and decontamination ventilation are set with separate intake fans, the clean ventilation new air volume and its pressure loss, as well as the decontamination ventilation...

Air inlet fans selected for their air volume and pressure drop.