High efficiency particulate air (HEPA) filters and ultra-low particulate air (ULPA) filters are air filters designed to trap a vast majority of very small particulate contaminants from an air stream.

Bag Filter Bag filters are fabric bags through which a gas stream is passed for the removal of particulate matter. Box / Rigid Cell Filter Box filters or rigid cell filters are boxes fitted with ...

Testing and certification company SGS is now able to undertake the testing of portable air purifiers against strict new US ...