To fulfill the customers' over-expected satisfaction , we have now our strong crew to provide our greatest general assistance which incorporates promoting, gross sales, planning, creation, top quality controlling, packing, warehousing and logistics for negative pressure airflow, Holtop Industrial AHU , Ventilation System heat recovery core , AHU heat recuperative core ,heat recovery ventilation . We have now ISO 9001 Certification and qualified this item .in excess of 16 years experiences in manufacturing and designing, so our items featured with best quality and competitive selling price. Welcome cooperation with us! The product will supply to all over the world, such as Europe, America, Australia,Auckland , Denver ,Uruguay , Monaco .More than 26 years, Professional companies from all over the world take us as their long-term and stable partners. We are keeping durable business relationship with more than 200 wholesalers in Japan, Korea, USA, UK, Germany, Canada, France, Italian, Poland, South Africa, Ghana, Nigeria etc.