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The IMPERIAL MFG GROUP USA INC GV0591 is an 8-inch round vent cap designed to terminate B-vent, exhaust, or general ventilation duct runs at an exterior wall or rooftop penetration. Constructed from galvanized steel, it resists corrosion in outdoor and high-humidity environments. The cap prevents backdrafting, blocks debris and pests, and maintains proper airflow direction for the connected vent system. It is a standard field-replacement component installed by HVAC technicians and sheet metal contractors on residential and light commercial ventilation systems.
This vent cap suits 8-inch round duct terminations on general exhaust, makeup air, and dryer or combustion vent applications where a durable, weather-resistant termination fitting is required. The galvanized finish makes it appropriate for exterior installations exposed to moisture and temperature cycling. It is sold in a package quantity of 7 units, making it practical for multi-unit or multi-job purchasing.
Designed as an OEM-style replacement and field-install vent termination fitting for 8-inch round duct systems used in residential and light commercial HVAC and exhaust ventilation applications.
Installation is typically performed by a licensed HVAC technician or sheet metal contractor. Shut down the connected ventilation or exhaust system before removing or installing a vent cap. Secure the cap per local mechanical code requirements, ensuring a weathertight seal at the penetration point. Do not restrict the vent opening below the minimum free-area requirement for the connected appliance or system.
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