To create extra value for customers is our enterprise philosophy; buyer growing is our working chase for ventilation hygiene, Total Heat , 600cmh ERVs , heat recuperative ventilation ,AHU core . Welcome to post your sample and color ring to let us produce according to your specification.Welcome your inquiry! Looking forward to building long-term cooperation with you! The product will supply to all over the world, such as Europe, America, Australia,Finland , Bahrain ,Chicago , Anguilla .Our mission is "Provide Goods with Reliable Quality and Reasonable Prices". We welcome customers from every corner of the world to contact us for future business relationships and achieving mutual success!