Does this work with an old Nutone 305CN? If not, WHY?
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Hi Sheetrum, Thank you for your question about the FG600 Upgrade Grille. Unfortunately we cannot test the compatibility with obsolete fan housings, so we cannot guarantee it will fit on a model 305CN. The FG600 is only compatible with existing ventilation fan housing dimensions of 7-1/2 inches x 7-1/4 inches or dimensions of 8-1/4 inches x 8 inches. The grille cover measures 10-1/4 inches x 9-3/4 inches.
