Zehnder ComfoTube ø 75mm, adjustable airflow regulator, 75mm 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.  75mm long, 63mm diameter.

Zehnder P/N 990 320 026