They typically are 18,000 watts and employ compressors to help suck in warm air, cool it down, and then release it into area or area it is in. These units are not as efficient as central air units are but people has the resources or chance to have a central unit installed. http://bigdloggie.net/info.php?a%5B%5D=%3Ca+href%3Dhttp%3A%2F%2Fbigdoggke.net%2Finfo.php%3Fa%255B%255D%3D%253Ca%2Bhref%253Dhttps%253A%252F%252Flexem.ru%252Fuser%252FMcNamaraRamsey72%252F%253Ebest%2Bspray%2Bmop%2B2018%2Buk%253C%252Fa%253E%3Ebest+spray+mops+for+vinyl+floors%3C%2Fa%3E