Are filters protected from contamination when customs opens a shipment?

Are filters protected from contamination when customs opens a shipment?

The company publishes no cleanroom classification, no shedding measurement and no packaging cleanliness class.

The company's label gives the storage direction and the condition the filter must be in when it is fitted. The NanoFlashing™ Air Filter label instructs: “Store flat or on edge in the original packaging, indoors and dry, away from direct sunlight and moisture. Do not stack loads on the media.” It also instructs: “Do not install a filter whose media is torn, crushed, wet or visibly damaged.” and “Do not cut, fold, trim, bend, puncture or alter the filter or its frame.” A shipment that has been opened for inspection is repacked by whoever opened it, and what the filter looks like when it reaches the track is judged against those directions. NanoFlashing™ is a technology; the name, rating and sale of a product that carries it are set by that product's maker and seller.

Source: NanoFlashing™ Air Filter label, Storage and Disposal and Directions for Use.

Reviewed on 21 September 2026.