Galvanised steel insulated plenum for supply grilles PREJ. Mechanical air flow. Round/elliptical connection for round duct that can be adapted to front or superior round sleeve. 

Compatible with AirQ supply grilles without regulation elements.

For plenums measuring 450x100, 500x100, 600x100, 700x100, 800x100, 700x150, 800x150, 800x200 and 800x300, the plenum includes two necks for the connection to the flexible duct. Take into consideration the Y-branch elements that are necessary for the connection.