Witten Automatic Vnt. 322BL PMD-1 Damper Foundation Ventilator by Witten Automatic Vnt.
Durable 16 x 8 polypropylene construction. Built in lintel: 18'' L., 1 3/4'' W. Net free area 72 sq. in. 1/8'' aluminum screen. Push pull smooth operating.Read more Witten Automatic Vnt. 322BL PMD-1 Damper Foundation Ventilator
Witten Automatic Vnt. 322BL PMD-1 Damper Foundation Ventilator Feature
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