AirMate® Return Air Grille, Series: 170, 18 x 10
- Type Return Air Grille
- Duct Height 17-7/8 in
- Length 10 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