We lost AC a few years ago over the hottest week I had ever been at Powell. We repositioned the boat to a very shady spot in a narrow canyon and then we went to Walmart and bought several of the cheap 110 volt window mount systems. We moved them to the lower bedrooms at night and to the galley windows during the day. It worked out fine. We used split aluminum canoe oars and duct tape to secure them to inside of window. Do not get the high BTU units as they will pop the 15 amp breakers, we used the smaller ones and had no problem. This is a cheap temporary solution to save your trip.