A connecting plenum box for up to 5 diam. 75 air ducts and one diam. 125 main air duct with direction change.

A connecting plenum box for up to 8 diam. 75 air ducts and one diam. 125 main air duct with direction change.

A connecting plenum box for up to 8 diam. 75 air ducts and one diam. 150 main air duct with direction change.

A connecting plenum box for up to 8 diam. 75 air ducts and one rectangular 60x200 main air duct.

A connecting plenum box for up to 5 diam. 75 air ducts and one rectangular 60x200 main air duct with direction change.

Connection piece for 1 diam. 75 air duct and diam. 125 main air duct or air disk valve with direction change.