The YDM revolving evaporative air cooler is our new achievement. The ZFK series air cooler are our patent product with its independent intellectual property, with its original technology of revolving pad, it can overcome the pad stoppage caused by dust on the traditional fixed filter pad. The revolving wet pad is being sprayed by water continuously when running, so that the dust in air is trapped by the wet pad and then be flushed out to the sink immediately. By replacing the water, the rubbish discharged from the machine. This type of air cooler combine many patent technologies and original technologies ensuring the product can never be blocked and has high-efficiency and a longer services lifetime. So the YDM revolving evaporative air cooler is the best choices for customer!