We are also focusing on improving the stuff management and QC system so that we could keep great advantage in the fiercely-competitive business for Commercial Heat Recovery Ventilator, crossflow heat exchanger , Holtop Industrial AHU , Holtop Heat exchanger ,COVID . We, with open arms, invite all interested potential buyers to visit our web-site or get in touch with us immediately for further information and facts. The product will supply to all over the world, such as Europe, America, Australia,Frankfurt , London ,California , Sacramento .We have exported our products all over the world, especially the USA and European countries. Furthermore, all of our products are manufactured with advanced equipment and strict QC procedures to ensure high quality.If you are interested in any of our products, please don't hesitate to contact us. We will try our best to meet your needs.