Also take note, you might need to be a licensed contractor to purchase those units. I know my buddy (adept at all things mechanical but NOT a licensed contractor) had to have his friend drive his company truck to the Home Depot to purchase & pick up this thing, since they wouldn't sell it to him directly (something about the refrigerant falling into enemy hands)
I'm think'n like smitty, who sez you gotta put it over the isle way. I got a small window unit in the back door window, thats were my sleeping area is. And when ever you and were you can insulate, its your friend.