My trailer has AC and heat vents in the bathroom. Neither are controlled vents, yet. I think it's a wash. In winter, it's nice to have the heat when I'm taking a shower....but it can get too warm and I open a door. In the summer it can freeze you....so I open a door. My solution will be to install adjustable registers.....if I can ever remember to do it
I've had trailers that didn't have those outlets and got along fine. Seems like it's just a matter of adjusting to what you have.....
