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A MINUS /4". B MINUS /4". ". • Heavy Gauge Steel Construction. • Finish: White. MFRG SERIES. RETURN AIR GRILLE. SPECIFICATION CHART. Size. The filter grille size that matches up to that value is what you will need in size. An approximate rule of thumb to use when engineering data is not available. Find many great new & used options and get the best deals for VENTI Filtered Return Air Grille 14x25" White Hfg at the best online prices at eBay!

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Shop for Air Return Registers & Grilles in HVAC Hardware & Parts. Global Industrial is a Leading Distributor of HVAC & Fans supplies. Return Air Pathways (Transfer Grilles) · Perfect Balance In-Door Return Air Pathways · Return Air Pathway 12″ x 12″ New Construction · Return Air Pathway 12″ x 4″. Return-air grilles, heat registers, and air diffusers should blend Choose from nineteen different sizes in baseboard depth for a clean profile in Snow.

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Overall dimensions: Standard frame width & height are 3″ greater than duct opening size. Flush mount frame width & height are ″ greater than duct opening. Always measure the size of the duct opening (the "hole" in the duct/wall). Do not measure the entire size of the register itself. Each grille has a front face. Shop By Size | Select by typical duct sizes. Metal, wood, & resin vent covers or heat registers, and air return covers standard and custom sizes available.