Requires ceiling grille with housing and wall or roof vent. Consider theAtmospheric 320for dual grille applications. This product is not designed for In-Shower applications. For Steam or In-Shower use please see theAtmospheric 410. Superior performance @ Higher Static May qualify for local utility rebate Variable speed control (sold separately) Remote fan, 190 CFM with mounting bracket Ceiling grille and housing measuring 7-3/16"Lx7-3/16"Wx5-5/16"H Dimensions:11-3/8" Diameter x 8" Length Housing Composition:Galvanized Steel Air Volume:190 CFM @ 0.20" W.G. Lubrication:Permanently lubricated, sealed ball bearings Protection:Thermal overload, automatic reset Speed Control:100% speed controllable Testing:U.L. Listed; CSA Certified Airstream Temperature Tolerance:Up to 140 degrees F Dimensions:6" Diameter x 6" Length Body Composition:Galvanized Steel, 28 Gauge Type:Removable screen, duct extension Dimensions:10-3/4" L x 8-1/4" W x 5-1/4" H Composition:Galvanized Steel, 28 Gauge Vent Extensions:8-1/8" L x 8-1/8" W x 7/16" H Duct Extensions:6" Diameter x 12' Length Grille Composition:Polyethylene plastic, UV resistant, brittleness temp -99 degrees F Extension Composition:Galvanized Steel, 28 Gauge Dimensions:6" Diameter x 25' Length Composition:Reinforced grey polyester with fiberglass insulation Operating Temperatures:-20 degrees F to 140 degrees F Operating Temperatures:Max 185 degrees F Composition:Liquid water-based sealant, UV resistant, grey Testing:UL-181-B, USDA, FDA, EPA approved