we can offer high quality products, competitive price and best customer service. Our destination is "You come here with difficulty and we give you a smile to take away" for wheel type heat recovery core, Energy saving fresh air ventilation system , Energy saving fresh air ventilation system , Classroom Ventilation ,Ventilation system . While using the tenet of "faith-based, customer first", we welcome customers to phone or e-mail us for cooperation. The product will supply to all over the world, such as Europe, America, Australia,Mecca , UAE ,San Diego , Venezuela .We also provide OEM service that caters to your specific needs and requirements. With a strong team of experienced engineers in hose design and development, we value every opportunity to provide best products and solutions for our customers.