[RickM]

Most of the portable ACs I've seen have a duct hose about the size used for a driers exhaust. I don't see why they wouldn't work well provided you can properly duct.

BTW, previous to me have central air installed I couldn't use window AC units either. Between sliding doors in most rooms and awning windows I didn't have many options. I did come up with a relatively inexpensive way to use a window unit in a sliding door though. If you have sliding doors in the rooms you want to cool let me know and I'll explain. You could probably buy 3-4 window units for the price of one portable.