Ceiling fan vent question

[tomottoe]

I’m pretty sure the answer is no, but it doesn't hurt to ask:

I am installing a ceiling fan/light in our upstairs bathroom. The fan vents into the attic. I can run the duct to a soffit vent, but the roof line is part of a dormer there, so it is a really shallow angle and working in there will not be fun. Coincidentally, the main vent stack is about five feet from the fan. I can’t (or shouldn’t) vent the fan into the main stack, right?—no matter how much more convenient it will make the install? Thanks,
tom

 

[frodo]

na, you cant do that, sewer gas would come into the bathroom when fan not on.

making your wife really mad,

get a roof top dryer vent flashing, run your fart fan duct into it

http://www.bing.com/images/search?q=dryer+vent+roof+jack&view=detailv2&&id=86B8909F8C84EA6F469EE9D81FBC1B4DF894BCB1&selectedIndex=0&ccid=tyKPCB2t&simid=607999681467322236&thid=OIP.Mb7228f081dade9a0f9756692d249fc8eH0

 

[Matt30]

Vent stack is not for those kinds of vents. I ran into this issue before where a new home owner couldn't figure out why their bathroom always smelled like crap. Hopped in the attic and sure enough the genius before them tied the duct into a plumbing vent.