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Broan-NuTone BD4 is a pressure relief damper assembly with an integrated wall cap and a 4-inch collar. It provides controlled intake or exhaust airflow for ventilation systems, including Broan energy recovery ventilating products. The unit is constructed from 30 gage galvanized steel and features an extra-long movable collar for sealing and easy connection to rigid or flexible ducting, plus a built-in birdscreen and wide nailing/sealing flange.
Pressure relief damper assembly with integrated wall cap and 4-inch collar for intake or exhaust ventilation; extra-long movable collar, built-in birdscreen, wide mounting flange; includes Fresh Air Inlet label.
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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