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The HART COOLEY 5eft is a tall roof flange designed for 5-inch Type B gas vent systems. It provides a weather-tight seal where the vent pipe penetrates the roof deck, preventing moisture intrusion and supporting the vent stack at the roofline. Rated for flat to 1/12 roof pitch, this flange is appropriate for installations on low-slope residential roofs. At 2.60 pounds, it is a manageable single-person install for HVAC technicians and plumbers working on gas appliance venting. It is a key component in maintaining proper B-vent termination above the roofline per applicable venting codes.
This roof flange is used in residential gas venting applications where a Type B double-wall vent system terminates through the roof. It suits low-slope roof conditions, covering flat through 1/12 pitch installations. Typical applications include venting for gas furnaces, boilers, and water heaters that rely on natural draft B-vent systems. It is installed by licensed HVAC technicians or plumbers during new construction or retrofit venting work.
Designed as an OEM-style replacement or new-installation component for 5-inch Type B double-wall gas vent systems on residential structures with flat to 1/12 roof pitch.
Installation should be performed by a licensed HVAC technician or plumber in accordance with NFPA 54, the International Fuel Gas Code (IFGC), and the vent manufacturer's listed instructions. Shut off the gas supply and allow all connected appliances to cool before beginning rooftop vent work. Ensure the flange is properly sealed against the roof deck to prevent water infiltration, and verify vent height above the roofline meets local code clearance requirements. Do not mix B-vent components from different manufacturers unless the system is listed for interoperability.
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