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When the installation requires the introduction of filtered air, a filter box prevents dust and impurities from entering the ventilated area. The sheet metal construction features an easy-open cover that allows for a quick change of the filter measuring 8 x 8 x 2 inches, the standard MERV 8 filter, or the upgraded MERV 13 filter. Part number FB4, FB5, and FB6 Dimensions FB4 with 4-inch duct: 8.12 W x 9 H x 11.78 D inches FB5 with 5-inch duct: 8.12 W x 9 H x 11.78 D inches FB6 with 6-inch duct: 8.12 W x 9 H x 12.78 D inches
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🇺🇸 Ship from USA · On Agora since 2026
$92.00