I have an appointment with the HVAC supply business that installed the furnace 2 years ago but it is months away. My question is can I remove this wall to make my shower bigger? Through research I think it is not a return vent because it is in the bathroom. I don't need a vent at all in the bathroom, the bedroom has another duct and vent that is ok. Can I just cut this stack duct out and tear the wall down and patch the floor and ceiling, saying I can cap it in the attic?
Also I am worried is this a load bearing wall? I and got sledgehammer crazy hating my small shower.