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The HART COOLEY 12rsc is a round storm collar designed for 12-inch B vent systems. A storm collar seals the gap where a vent pipe exits through a roof penetration, blocking wind-driven rain, debris, and drafts from entering the building envelope. This collar also fits 10-inch all-fuel vent applications, giving it dual-use value on service calls. Licensed HVAC technicians and plumbers install this component as part of a complete venting assembly on gas appliances including furnaces, boilers, and water heaters. At 0.75 pounds, the collar is lightweight and manageable for single-technician roof work.
This storm collar is suited for residential and light commercial venting installations where a B vent or all-fuel vent pipe passes through a roof deck. It seats against the flashing and mates with the vent pipe to form a weather-tight seal at the roof line. The dual-size compatibility — 12-inch B vent and 10-inch all-fuel vent — makes it a practical stocking item for service vans and supply houses serving mixed venting system types.
Designed for use with 12-inch B vent round vent systems and also fits 10-inch all-fuel vent applications as stated by the manufacturer.
Installation is typically performed by a licensed HVAC technician or plumber working on gas appliance venting systems. Shut down and allow the appliance to cool before working on any vent components. The collar should be positioned against the roof flashing and secured per the vent system manufacturer instructions and applicable local mechanical codes. Follow IFGC requirements for B vent and all-fuel vent terminations when completing the roof penetration assembly.
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