Yantai Dongtai stander ventilation equipment co., LTD. is located in the beautiful coastal cityYantai, which is a join-stock company from the subsidiary of state-owned business AVIC"AVICoffshore engineering co., LTD.",  Specialized in the HVAC system engineering of laboratory, purification and Marine& offshore engineering .The company has a solid production base and strong technical. Our engineers have the first-class project management and design experience at home and abroad. Main products: spiral duct, rectangular duct, cabin unit, volume control damper, non-return damper, silencer, louver, penetrating piece and other ventilation accessories. The products meet GB50243-2016 standard, European DW144/143 international standards. We passed the ISO9001 and ISO14000/18001 certification