Being supported by an state-of-the-art and skilled IT team, we could supply technical support on pre-sales & after-sales service for Counter Flow Heat Exchanger, Single Room Heat Recovery Ventilators, Clean Air Ventilation, Vertical Heat Exchanger,Single Room Heat Recovery Ventilators. 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,Riyadh, El Salvador,Jordan, Malta.We have 48 provincial agencies in the country. We also have stable cooperation with several international trading companies. They place order with us and export products to other countries. We expect to cooperate with you to develop a larger market.