SHUTTER FOR VENTILATION VK 250

The self-closing damper VK is made from UV-protected material and has low flow resistance. For example, at a flow velocity of 4 m/s, the flow resistance is 10 Pa, at 6.5 m/s it is 30 Pa, and at 8.5 m/s it is 50 Pa. During installation, it must be noted that the damper blades point downward, so when there is no airflow, the closing blades prevent backflow. This product description is an automated translation of the original Finnish description.