Aluminum perforated return grille with radius end cap, 3/16" perforations on 1/4" staggered centers
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
  • Perforated 3/16” holes on 1/4” staggered centers
  • All-aluminum construction with radius end caps to match duct diameters from 6” thru 36” in even increments
  • Foam gasketing standard for tight seal to duct