We just had a new ac installed. Bigger and more efficient. But our sons room still will not cool like the rest of the house. He does have a slidding glass door and gets sun most of the day. We live in Las Vegas and it is 113 today. We have solar screens on all the windows and on his glass door and we even put some heavy curtains on it. But to no avail. He has to use our portable swamp cooler in there just to get it comfortable. The rest of the house cools great better then ever and my electric bill was cut in half from this time last year. Anyone have any other ideas that we can do? We just do not know what eles to do.