Our firm sticks to the basic principle of "Quality is the life of your company, and status will be the soul of it" for passitive house ventilation system, Keywords A , heat exchange wheel , Plate fin Heat Exchanger ,Home fresh air ventilation system . We guaranteed high quality, if clients were not satisfied with the products' quality, you can return inside 7days with their original states. The product will supply to all over the world, such as Europe, America, Australia,Uganda , Atlanta ,moldova , Namibia .With more than 9 years of experience and a professional team, we have exported our products to many countries and regions all over the world. We welcome customers, business associations and friends from all parts of the world to contact us and seek cooperation for mutual benefits.