I am starting to look at ventilation in my new darkroom setup.
The easiest way would be to piggy back the exhaust to the dryer vent out of the house.

Are there any solid reasons why this should not be done?
Lint getting in to the darkroom etc?

I have a decent darkroom exhaust fan now, but if need be, Home Depot sells an inline fan to supplement the flow if need be.

http://www.homedepot.ca/product/vort...-4-inch/995921