Heating Help

Bathroom fan code?

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.

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,

Thanks

Thanks for the reply Bob I appreciate it.