AC Infinity Backdraft Damper Ducting Insert, 4-Inch, Black Galvanized Steel lighting Nutrient Analysis: Among guaranteed Nutrients

Nutrient Analysis: Among guaranteed Nutrients

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AC Infinity Backdraft Damper Ducting Insert, 4-Inch, Black Galvanized Steel lighting Nutrient Analysis: Among guaranteed NutrientsDescription Antidraft duct insert: This item is designed for use with range hoods, bathroom fans, and other home HVAC applications. It features outer rubber gaskets that create an airtight seal and grip between the damper and ducts. Mounting options: The product mounts horizontally or vertically to prevent backflow and debris from entering the ducting. It is made of galvanized steel with spring loaded aluminum damper blades that open with minimal