Comment: Replace bathroom fan. Box where fan plugs in is 7 1/4" x 9", cover needs to be 8 1/2" x 10 1/2". Vents vertically. Electrical switch is on wall.
Comment: The fan works fine sometimes, but has been more frequently rubbing on something above the metal casing, causing a high pitched screeching noise. The noise will stop if you firmly tap the ceiling by the fan.