We offer great strength in quality and development,merchandising,sales and marketing and operation for negative pressure ventilation, Counterflow Core Recuperator , air to air heat recovery core , HVAC Unit ,fresh air recuperative ventilation . We warmly welcome small business companions from all walks of lifestyle, hope to establish friendly and cooperative business make contact with with you and attain a win-win objective. The product will supply to all over the world, such as Europe, America, Australia,Georgia , Guatemala ,Hungary , Florida .We'll continue to devote ourselves to market & product development and build a well-knit service to our customer to create a more prosperous future. Please contact us today to find out how we can work together.