the housing of COOLCOM DC Tangential fan was punching by precision tooling, electroplated(black painted), delicacy appearance, dynamic balance testing for the aluminum impeller, stable dynamic running, large air volume. COOLCOM cross flow fans produce a laminar airflow and allow for horizontal or vertical mounting. are frequently used in diverse applications ranging from HVAC, electronic systems, heater ,green-house, Radiator, air curtain ,food preparation equipment....