Duct and venting products help direct airflow through a building's HVAC system and the intake and exhaust vents. Ducts and fittings are the primary components of an HVAC system that carry air where needed. Gas and chimney venting products provide a weather-tight path to direct exhaust gases out of a building. Grilles, registers, and diffusers are installed onto the ends of ducts to filter and redirect air moving into and out of a room. Vent caps and hoods protect the outside terminations of a duct from debris and weather intrusion. Roof vent pipe boots install around roof openings and create a weather-tight penetration for pipes and ducts. Roof repair tapes, tools, and supplies repair damaged roof surfaces and help maintain the roof's weather barrier.