Suzhou Xinhuoyun Intelligent Technology Co., Ltd; Dedicate to developing and manufacturing world-leading laboratory fume hoods. Our PRANDTL serie fume hoods have passed JB/T6412, EN14175, ASHRAE110 tests. Leakage rate of 99.99% sulfur hexafluoride is under 0.01PPM at 0.3m/s face velocity. Equipped with standard fume hoods testing lab, our experienced technology team keep every fume hood we manufactured qualified for your daily use. We welcome every lab owner and distributor from all over the world to choose our fume hoods for your lab safety.