Re: My Fan Blows
My guess is that either the fan CFM is rated higher than the ducting can handle or the line is blocked in some manner. Have you checked for airflow at the exhaust point outside the house? I'd start there and if there's no or low flow, start tracing the ducting to make sure it's not crushed or blocked. The only other thing I can think of is that the fan housing is designed to exhaust in two different directions and you neglected to knock out the hole in the housing.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!