| Product Type: | Grille w/ Housing |
|---|---|
| Size: | 7" |
| Duct Size: | 4" |
| Warranty: | 7 Year |

This part is just the intake for a separate fan unit. The fan unit will have one or more inlets (so you can pull air from multiple locations. These units are typically mounted in attics or behind an access cover. The noise you hear depends mostly on how long the ducting is from the intake to the fan, the longer the duct, the quieter it is.