Explore top-quality venting and ductwork products at F.W. Webb. Essential components for ductwork and venting installation include collar rings, duct connectors, flanges, and butterfly dampers. A butterfly damper is a key component of a duct system that controls how much air or gas comes through the unit. Use our convenient filters to sort the vent and duct parts by size and material to secure an exact match for a home or commercial HVAC. Browse options in ductwork and venting products from trusted makers Hart & Cooley, Field Controls, and Ductmate to find the right components for a new or existing system.