Backdraft Damper - Spring-Loaded One-Way Airflow Valve size:12" INHALED: Remove person to fresh

INHALED: Remove person to fresh air and keep comfortable for breathing

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Backdraft Damper - Spring-Loaded One-Way Airflow Valve size:12" INHALED: Remove person to freshPrevent reverse airflow and protect your ventilation system with this professional grade spring loaded backdraft damper. Engineered with high quality steel and lightweight aluminum, this one way valve ensures air flows in only one directionkeeping bugs, odors, and contaminated air out of your grow room when fans are off. Why You Need a Backdraft Damper When your exhaust fan shuts off, negative pressure can draw outside air, bugs, and untreated odors