Aluminum universal end cap spiral grille, double deflection with 3/4" blade spacing, front blades parallel to short dimension
Spiral Grilles mount directly to the duct, eliminating the need for duct taps. They are available in two border styles: S series for radius end cap to match duct diameter, and US (Universal) series which can be used on any duct diameter. Each grille has a gasket to provide a tight seal to the duct.
  • Spiral Grilles save contractor installation time and money by directly mounting to the duct
  • Available with single or double deflection, with adjustable louvers vertical or horizontal
  • Front louvers availble in vertical or horizontal
  • All-aluminum construction with universal end caps to match duct diameters from 10” thru 36” in even increments
  • Foam gasketing standard for tight seal to duct
  • Optional ASD (Air Scoop Damper) - operable with Phillips screwdriver for volume adjustment, accessible from grille face