A backdraft shutter is used with inline fans and duct, to stop air flowing in the “back” direction. They have a single disk flap on two hinges.
Backdraft Shutter – Metal – 100mm
$27.00
A backdraft shutter is used with inline fans and duct, to stop air flowing in the “back” direction. It has “butterfly” wings and a very weak spring to minimise airflow reduction.
Integrated Industrial Mining Supply –
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