I have a Kenmore portable air conditioner model - 408.72012. this particular model can be housed on the outside of the building and the A/C air is vented into the inside space (normally through a window). Almost the opposite of what you normally do with a portable A/C unit.
I have an office right next to my LR and want to pump the A/C into my LR sometimes and other times into my office. Because I did not have a window to have my A/C Air come into my office through a hole we cut and placed and fit a flexible dryer vent pipe (the white floppy accordion style)through the wall and on the inside of my office I have the dryer vent cover with flaps (like you would normally see on the outside. This prevents and critters from getting in.
I am trying to figure out how to split the out flowing A/C air though a "dual Y pipe of some type to flow into my office when I want it in there and my LR when I want it in there.
IS there any such thing as a U pipe that is not rigid that I could use for this and also some how block them when I want it to flow in only one side or the other?