Zehnder ComfoTube ø 75mm, adjustable airflow regulator, 30mm length

The airflow regulator has 5 different restriction settings to reduce the airflow silently.  It can be used either at the manifold box or at the grille housing by inserting it into the ComfoTube ductwork.  30mm long, 63mm diameter.

Zehnder P/N 988 320 030