Specifications & Technical Details
The Spiral Duct Diffuser is used in large areas — factories, warehouses, workshops and gymnasiums — where grilles can be attached directly to the spiral duct which eliminates boots or special adapters for the installation of the grilles.
Available with our 150 Single Deflection Supply Grille in (H) horizontal or (V) vertical orientation where each blade is individually adjustable for 2-way deflection, or with our 250 Double Deflection Supply Grille.
Specify: Series S-44 Opposed Blade Damper attaches to 250 Series to make supply registers. The S-44 OBD assures even distribution of air across the grille face as well as positive volume control.