be turned into portable ac, by having intake and outake? I have done this before with a smaller ac..18,000 btu's....but have never had success with the bigger ac's. I need to know what size inline fan and venting to use? How much air needs to be moved from the back of the unit? Is this possible with such a large ac, doe I need larger venting? I currently have the 25,000 btu hooked up to 6 inch fan and venting, and the compressor will not stay on for more than 20 minutes....temps are soaring, and so is my blood pressure, trying to figure this out!!!! Please help me out with this one....thanks so uch. Stay HIGH, it's better than being low!!!!!!!