Combined supply and extract ventilation systems for various premises where high air flow at relatively low system resistance is required.
DFA fan casing is made of galvanized steel and the impeller is made of stainless steel.
The motor is equipped with slide bearings.
Both smooth and step speed control is performed with the thyristor or autotransformer controller.
Several fans can be connected to one controller in case the total power and operating current do not exceed the rated controller values.
DFA series fan is installed into the duct by means of clamps or directly inside the wall.