AirMate® Return Air Grille, Series: 170, 20 x 16 in, 19-1/2 in Duct Width, 15-7/8 in Duct Height, 17-3/4 in Overall Length, 21-3/4 in Overall Width, 5/16 in Overall Depth, 40 deg Deflection, 1/2 in Blade Spacing, Steel, Bright White, Import
- Type Return Air Grille
- Size 20 x 16 in
- Duct Height 15-7/8 in
Catalog-1
- 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