http://blog.coltinfo.co.uk/download-the-whitepaper-the-facts-about-evaporative-cooling/.html The benefits of evaporative cooling in warehouses and industrial buildings are many: it is a highly energy efficient technology, that uses no refrigerants, provides a pleasant indoor climate, is simple and easy to maintain and, last but not least, running costs are four to seven times lower than traditional air conditioning solutions – and they are even lower in data centres.