Air conditioners do no longer paintings if the nice and cozy air from the condenser is decrease back into the room. it rather is why small air conditioners are positioned into domicile windows, or right into a hollow shrink interior the wall. they are rather a "warmth pump" in that they have a warm "component" and a cold "component" - in case you do no longer deliver the nice and cozy air from the nice and cozy component exterior, it basically gets recycled, and that isn't in basic terms strengthen the electrical powered invoice, in spite of the incontrovertible fact that it won't cool off the room. Your superb wager (different than to expand this alongside with your father and his spouse, it rather is what i might do) is to place a fan interior the window at nighttime and get the room as cool as obtainable, then close it up interior the morning and examine out to maintain the cool air interior the room. As for escalation, does your father like the domicile being that warm? How do they take care of it whilst they decide for to... er, y'know, get actual on a warm day? Or do they get exhilaration from being sweaty and moist?