4FFL
Aluminum aeroblade filter grille, 45 degree deflection, 1/2" spacing, blades parallel to long dimension
AeroBlade Filter Return grilles are the quietest in the industry. Utilizing a unique airfoil blade design, these grilles provide the ultimate in performance and noise reduction. AeroBlade grilles are available in steel or aluminum construction and various blade spacing options.
FEATURES AND BENEFITS
  • Series 4FF filter grilles feature louvers spaced ½” apart
  • 4FF models are available in common filter sizes
  • 1” thick filters may be purchased from hardware stores for the most common sizes
  • Blade deflection angle is 45°
  • Quarter turn fasteners are standard to make filter access easy
  • Knurled knob fastener available as option
  • All dimensions are ± 1/16”
  • Filters by others
  • Dimensions are the same for border type 1 (surface mount) and border type 3 (lay-in T-bar)