We believe that long term partnership is a result of high quality, value added service, rich experience and personal contact for Ventilation System heat recovery core, Home fresh air ventilation system , Ventilation system , Recuperator ,Air Conditioning System . First business, we learn each other. Further business, the trust is getting there. Our company always at your service at any time. The product will supply to all over the world, such as Europe, America, Australia,Frankfurt , Guyana ,Argentina , Sao Paulo .Our production have been exported to more than 30 countries and regions as first hand source with lowest price. We sincerely welcome customers from both at home and abroad to come to negotiate business with us.