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Get exhaust fan frames from Grainger in the size you need. You’ll find Venturi frame options in numerous sizes, from a 12” x 12” square frame with a blade diameter of 8” up to a 40” x 40” square with a 36” blade diameter. Wall mounted rigid galvanized steel frames feature deep Venturi and 1”W flanges. Choose the size that fits your fan. Shop Grainger today.Close