Panasonic bath transmits rain sounds, takes a long time to clear
Panasonic fan replaced a 21-yr old Broan that vented into the attic. Our contractor vented the Panasonic with 6-inch ducting through the roof (a minor zig zag to get the vent to the rear roof), and now when it rains, its sound is thundering in the bath. Any suggestions on how to silence the fan area when it rains?
Also I was wondering if the zigzag path (90 degree turn coming from bath to attic floor joist, then 2 more 90 degree bends to get to roof) of the venting is not allowing the fan to fully exhaust our shower's moisture? I have held up a tissue to the fan when it's on and the tissue flutters, but doesn't seem to be sucked up against the fan.