Im gonna be running 400watt hps with 6inline out connected to 265 cfm blower and carbon filter my question is,i am a newbie indoor grower and i was gonna exhause it out the window with a 6 intube,can i just exhaust it back into the room or will the exhaust smell like marijuana,or should i exhaust it out the window?I also have a itake in the botoom.
If you're worred about the smell then make yourself (or buy) a carbon filter then the air won't stink and you can do whatever you want with it.
As long as it's a window nobody can see I would take it out the window. Since it has a carbon filter it won't smell, and if you dump it back into your room then it's going to heat the room up and make it harder to cool your box.