The system is assembled of polyurethane parts which offer many benefits compared to traditional materials:
Suction cone with closing flaps
The polyurethane exhaust units are equipped with suction and blow cones.
The exhaust unit can also be equipped with adjustable closing flaps. In that case the fan is placed into the duct.
The correct shape of the exhaust unit is the key element in the true power and energy consumption in ventilation.