To create more value for customers is our business philosophy; customer growing is our working chase for no cross contamination heat exchangers, villa fresh air ventilation sytem , HEPA Filter , Energy saving fresh air ventilation system ,Heat recovery ventilation system . All prices depend upon the quantity of your order; the more you order, the more economical the price is. We also offer good OEM service to many famous brands. The product will supply to all over the world, such as Europe, America, Australia,Cancun , America ,Chile , Greenland .With the aim of "compete with good quality and develop with creativity" and the service principle of "take customers' demand as orientation", we will earnestly provide qualified products and solutions and good service for domestic and international customers.