Electric foot pedal dual-use fan. When installing the fan, ensure it is in a horizontal position. The weight of the return air duct and valve should not be placed on the housing. The fan selection should

Based on the air volume and pressure loss of the air intake system, determine the air volume and pressure loss to be calculated separately when determining the fresh air volume during clean ventilation and the filter-toxin ventilation.

New airflow and corresponding pressure loss at the respective airflow rates. If clean ventilation and filter-toxin ventilation share a single fan, the airflow and pressure loss of both should be considered.

Blower selection for power loss; if the clean air ventilation and toxic gas ventilation are set with separate inlet blowers, the blower should be selected according to the fresh air volume of clean air ventilation and its pressure loss, as well as the toxic gas ventilation...

Air inlet fans with selected air volume and pressure drop.