Bathroom fan code?

ChrisJ

This feels like a dumb post but I like to do things the right way.  I'm installing a fan in our main bathroom as it doesn't have one.



Are there any codes I should be aware of?  8x10 bathroom with a tub\shower and I'm planning on a 110CFM fan vented via 4" flexduct via a damper on the roof.  Fan will be controlled by a 3 switch control for light, fan, night light installed by the door and out of reach from the tub.

Bob Harper

bathroom ventilation considerations

Based upon the 2009 IRC:

min. 50 cfm intermittent ventilation or 20 cfm continuous

must discharge directly to outdoors--not attics, garages or crawlspaces

flex duct flame spread 200 or less

joints sealed with UL181 B-FX tape or 181 f-M mastic

three screws equidistantly spaced at connection to flanges

seal penetrations per energy code

fireblocking per R302.11

corrosion resistant screen, grilles, or louvers

outlet protected from direct weather

one wall switch controlled light-may be occupancy controlled



HTH,

ChrisJ

Thanks

Thanks for the reply Bob I appreciate it.