odor is a must

preparing my grow closet right now im planning on ordering these along with a regular wall mount fan. do you think its not necessary for both? and also will i need to have an vent leading outside for these?

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=120516796991&ssPageName=STRK:MEWAX:IT

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=400085894447&ssPageName=STRK:MEWAX:IT