Hog Slat Inc. Newton Grove, NC USA December 2022 7 Air Storm Fans Installation Framing The rough in opening for the fan is an exact measurement that accounts for the heads of fasteners and openings for fan. Ensure there is proper clearance for installation or rough opening may require larger measurements. Fan Model Size Rough Opening (Width x Height) 57” Fiberglass Outside Mount Panel Fan LARGE 57” X 57” (144.8 cm x 144.8 cm) SMALL 54” X 54” (137.2 cm x 137.2 cm) Additional Mounting Holes may added to accommodate rough openings that range between large and small rough openings
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