Panasonic FV-07VBB1 Ventilation EcoVent Universal Contractor 4 Pack Motor & Grille Assembly 70 CFM 0.7 sones at 0.1" w.g. (56 CFM/1.3 sones at 0.25" w.g.). Small grill design complements the aesthetics of your bathroom, powder room or laundry room. Fits in 2 x 6 construction. UL listed for tub/shower enclosure when GFCI protected. Can be used to comply with ASHRAE 62.2, LEED and ENERGY STAR for Homes 3.0. Description: Motor/Grille Assembly; Sones: 0.7; CFM: 70; Duct Size: 4". Can be used to comply with ASHRAE 62.2, LEED and ENERGY STAR for Homes 3.0. UL listed for tub/shower enclosure when GFCI protected. Fits in 2 x 6 construction.