Powder Coated Metal Dryer Vent Box. The inexpensive DBX101 7FR metal dryer vent box is powder coated white to match the washer box. The box is 1O” WIDE BY 17″ TALL and designed to fit into a 2 x 6 framed wall. Designed and tested to meet 1 hour equal F&T fire rating requirement for through penetration fire rated system.
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