MRCOOL U-Shaped Window Air Conditioner, 115 VoltEnjoy Ice Cold Energy Efficient Air Conditioning Without Professional Installation The new U shaped Window Air Conditioner is the latest technology to come from MRCOOL. With its revolutionary U Shaped design, this Air Conditioner gives you the ability to open and close the window it is installed in. That's right, you don't need to give up the functionality of your window! By being able to close the window, it helps create a sound barrier to keep