The Broan-NuTone® RVK1A steel roof cap kit is an easy-to-install vent for exhaust fans (bathroom, rec room, home gym, etc.). It is compatible with 3" or 4" ductwork and includes a 3" to 4" adapter for convenience. This cap features both a back draft damper and bird screen, preventing outside air from entering the home and birds or small pests from entering duct work. This kit includes all materials needed for installation, including 8 ft. of 4" flexible ducting, 4" metal duct connector, 4" to 3" reducer, nylon zip ties and mounting screws. The flexible ducting conforms to UL 181 class 1 air Connector and CU S110 requirements. Not suitable for dryer venting.
8-ft of 4-in 2-ply metallic laminate flexible duct which conforms to UL181 Class 1 air connector: NOT recommended for dryer venting
Includes Model 636 roof cap
Includes 4-in metal duct connector and 2 nylon zip ties
Includes 3-in to 4-in adapter
Easy to install in new construction, replacement, or DIY applications
Compatible with 3 in and 4 in round ducting