Quality Spot Air Cooler from China. These spot air units are preferred because of their convenience and efficiency -- no water lines need to be introduced in the desired room. Our portable air conditioners use ambient air in the surrounding environment so they don’t need any kind of special intake system to operate. Industrial air coolers created from the refrigeration process is exhausted off the top of the unit and can be ducted into the ceiling plenum or directed out the nearest door or window to exit the room or space. There’s no need to break the bank at Home -- our cheap portable air conditioners can handle virtually all spot-cooling scenarios … set up and operational in less than five minutes. Welcome to visit our official website : http://www.spotaircooler.com