We are a high-tech manufacturer engaged in the design and production of evaporative air coolers. Our company develops a series of high quality, energy saving and environmentally friendly "YDM" branded evaporative air coolers with advanced technology. Having passed the ISO9001 quality certifications, we can guarantee excellent quality products. Produced using advanced technology, our products have high cooling efficiency, large airflow, and low noise. We have a strong scientific research program that has introduced YDM series differential airflow style evaporative air coolers into the market and developed top outlet and down outlet models. Our company has been awarded two national patents, "high strength composite pad" and "revolving pad mandrel". We also supply the services for the ventilation engineer project design to make the YDM evaporative air cooler working with highest efficiency. With the high strength filter pad composite and another national patent revolving filter pad mandrel, the filter pad of the YDM machine can be keep washed by pressure water, and all the dust and insects trapped on the filter can be wash out. So the filter pad is always clean, and the cooling machine can keep working in high efficency.