Bathroom Exhaust Fan Ducting
I am in the process of finishing my basement. We have a rough-in for a bathroom that I will finish in the future. The bathroom will also house the laundry (washer and gas dryer - vented to the rear of the house via rigid metal ducting). The bathroom/laundry is about 70 to 80 sq. ft. and I only plan to add a pedestal sink and toilet - no shower. That said, I have the fan housing (70 cfm fan) installed and am planning the run to the front of the house - through the rim joist and siding. Aside from the issues I have with getting the flat exhaust cover to work on lapped siding, my ultimate questions are
1.) Should use the flexible insulated ducting? I purchased some but haven't installed it. The run is only about' 8 to 10' with no bends. The cover I have has the louvered damper flaps and I live in the Northeast.
2.) If the ducting is insulated and I add some insulation in the joist space + there is insulation at the rim joist, should there be any concern about condensation and mold, especially if there is no shower in the bathroom?
ANy advice is appreciated. Thanks!!
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