Hydrofarm-Backdraft-Damper-12’in
$46.54Made of galvanized steel, these dampers prevent air leakage into your fan setup. They are easy to install, fit directly onto the ducting, and prevent a backdraft of air when the fans are switched off.
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Thermoflo-Back-Draft-Damper-8in
$38.94Benefits of the Backdraft Dampers Specifically designed to be used with ThermoFlo flexible ductingDesigned to allow airflow in one directionMinimum air leakage designAluminum spring loaded backdraft damper blades20 gauge steel housingSimple installtion – entire assembly inserts into ductCan be installed in any positionDesigned for vertical or horizontal mountExterior foam gaskets assure a tight seal