AirMate® Return Air Grille, Series: 170, 24 x 30 in, 23-1/2 in Duct Width, 29-7/8 in Duct Height, 28-1/4 in Overall Length, 25-3/4 in Overall Width, 5/16 in Overall Depth, 40 deg Deflection, 1/2 in Blade Spacing, Steel, Bright White
- Size 24 x 30 in
- 1/2 in spaced fins set at 40 degree
- Exceptional free area
- 5/16 in margin turn back
- Filter grilles tested without filter
- Typical capacity is 2 CFM per square inch of nominal filter area
- Recommended face velocity is 300-450 FPM
- Velocities higher will decrease filter performance, increase flow resistance, and possibly be of noise concern