The high performance exhaust fan series feature a unique Snap-In-Installation System Installs in ceiling The durable high impact plastic housing ensures quiet operation and maximum performance Motors are suitable for continuous operation Includes wire nuts and romex connector 4 plastic duct collar with back draft damper insures quiet operation and prevents drafts from entering the room White, polymeric grill Dimensions: 10 x 10 One piece polymeric wheel Rated for ceilings insulated to R-40 cULus Listed HVI2100 Certified. CFM=50 Sones=1.0