Project packs are ideal for contractors and builders who have yet to pick out the final product. With the housing for the fan sold separately from the grille and motor, contractors are able to continue with construction and not have to worry about damaging, losing or storing the product. Once all construction is complete, the purchase of a finish pack, 6 grilles and 6 motor/blower wheels, can be made to add the finishing touches to the room. 6 bath fan housings Galvanized steel housing provides durability Can be mounted in the ceiling or wall Can be used to upgrade Nautilus N671 and N688