We have dogs and sometimes like to be away from the trailer for a couple hours. There is an app/gadget that will allow you to monitor temp inside your coach while you are away, if it gets too hot, come back because you know your AC tripped. Also, Milwaukee makes a fan that runs off their tool battery that lasts a few hours when set to low. Our guys were good for 2-3 hours, but the younger male just tried to mark something in the trailer, so now he is going in then kennel during away times. Now we only go for an hour to 90 mins.