STL has been established for over 40 years, and has over 20 years of experience in designing and manufacturing of air purification and air sterilization products. All products are designed by our in house team of experienced engineers, and manufactured in our own manufacturing facilities to the strictest quality standards.

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STL's manufacturing facilities implement internationally recognized quality systems including ISO9001 and US FDA GMP (QSR). We have been ISO9001 certified since 1994, ISO14001 certified since 2022, and are a FDA registered manufacturer. We have experience working with a variety of certification/standards, including CE, UL, ETL, FCC, BABT, a variety of EN standards, and RoHS/WEEE compliance. 

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STL's head office is in Hong Kong, with manufacturing facilities in the People's Republic of China.

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