Why install the vent fan in the bedroom?? Maybe you are like my D/W, she has to hear the noise of the fan to sleep. All you have to do is open the vent over the bed, turn the fan on in the bath or another location, now you can feel the breeze as the air is being drawn down through the vent
in your bedroom with no noise of the fan running.
I found my 8285WS is so air tight in order for the vent fan to pull steam, moisture out while showering, we have to open a small window in the hallway in order for the vent to work properly. When we were first looking
at the 8285WS, I could not figure out why such a small funky window was installed just outside the bath across the hall. I even made a comment to the delivery people during the walk through, why such time and effort was made to install such a small window in the wall in the hall so high up.
Now, Big Dummy me knows why that "FUNKY" window was installed.
I do the same thing when we are using the stove in the kitchen, open the window slightly in the kitchen, turn the vent fan on in the stove vent hood.
If you are using the oven, place your hand at the back of the top of the stove. Feel the heat escaping from the oven chimney that is built into the back of the oven, by opening the window just behind the stove you create a fresh air path for the vent hood exhaust fan to pull hot air out of the kitchen.
Maxxair II's (3 each) was purchased by me 6 weeks before the RV was built, they are almost a must here in Florida, especially during the winter for ventilation to keep the mold and musty odor out when the RV is not in use.
Just my 2 cents!