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The IMPERIAL MFG GROUP USA INC GV1349 is a 24-gauge galvanized steel taper reducer designed to transition round duct from a 6-inch diameter down to a 5-inch diameter. The small end is factory-crimped for direct insertion into the receiving duct or fitting without additional field prep. This fitting is a standard component in low-pressure residential and light commercial HVAC duct systems. HVAC installers and sheet metal mechanics use it to step down trunk or branch runs where airflow volume requires a smaller downstream duct size. The galvanized steel construction resists corrosion in typical air-handling environments and meets the durability expectations for concealed duct installations.
This taper reducer fits into residential forced-air heating and cooling systems and light commercial duct layouts where a concentric round reduction is needed. It is suitable for new construction and retrofit applications. The factory-crimped small end seats into the next duct section or collar without sheet metal screws on the female end, speeding assembly on the installation bench or in the field. Sold in a package of 12 units, making it practical for contractors stocking fittings for multi-unit or production builds.
Designed as an OEM-style replacement and standard fitting for residential and light commercial round galvanized duct systems using 6-inch and 5-inch round duct components.
Installation is typically performed by licensed HVAC technicians or sheet metal mechanics following SMACNA duct construction standards. Power down the air-handling unit and lock out the system before making any duct modifications in a live system. Secure the fitting with sheet metal screws and seal all joints with UL-listed duct sealant or approved foil tape per local mechanical code requirements. Do not use this fitting in high-pressure or high-velocity duct systems beyond its rated gauge capacity.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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