Back Draft Damper - 6 Inch wpg-only then only refill once that

then only refill once that supply has been used by the plant

used with the included prefilter

Backside Length: 9

Carbon Pre-Filters: 2

including greenhouse cucumbers and field cucurbits such as cucumbers

Back Draft Damper - 6 Inch wpg-only then only refill once thatBack Draft Damper is a galvanized ventilation damper for ducted fan systems, designed to help block reverse airflow and reduce air leakage during fan downtime. Built as a backdraft damper for ventilation ducting, its a straightforward airflow control component for growers and gardeners who rely on consistent air exchange. In spaces where air movement drives comfort and stability, unwanted reverse airflow can pull stale or outside air back through the