Hog Slat Inc. Newton Grove, NC USA December 2022 6 Wind 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 Rough Opening (Width x Height) 52” Butterfly Exhaust Fan 56 1/2” X 56 1/2” (143.5 cm x 143.5 cm) FAN SPACING Fans have a minimum spacing of 8” to avoid interference of cones. Fans may be spaced 3.5” if cone guards are modified (Minimum spacing will cause cones to be deformed)
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