Inline fan's exhaust setup for winter

So winter is coming and I have no way to setup my inline fan to exhaust outside and need to keep it inside. Need advice on how to do this without smell being an issue. Humidity should be OK since I'm planning on getting a dehumidifier. Already have 6 in. Carbon filter with only 2 months use but smell is still quite pungent. Gotta stay stealthed.

Thanks for any useful advice you guys could give me.

Cheers

Can I ask, why you can't exhaust outside? Is it because of smell, or because there is no where to exhaust out? Smell can't be solved and so can a spot to exhaust out. If you have to go inside you have to be careful. For example, if you are in a tent in a bedroom, and exhaust out of the tent into the bedroom the bedroom would get hot and you would need much cooling. More info would help me help you find a solution, thanks.