Ensuring optimum filtration

The new ISO 16890 standard entered into force in August 2018. It establishes new and stricter global reference standards, classifying and defining the test procedures for air filters used in general ventilation systems.


The new standard:

  • specifies and investigates useful criteria for the end user to make targeted choices with respect to the filtration system
  • provides guidelines for designers to specify the filtering sections
  • considers a particle size range of between 0.3 µm and 10 µm
  • makes the control tests stricter, improving Internal Air Quality (IAQ)
  • establishes the danger of PM1 to our health
  • clearly specifies what efficiency rating is required for filters in order to assure a real improvement in the quality of the air we breathe

The quality of clean air can now be measured with clear standards that specify what filtering components are necessary to obtain the best results.

filter particulate matter


Depending on their intended use, the filters can be installed as single-stage banks or multi-stage filter banks, i.e. a combined series. When two or more filter banks are used, they become a filter unit: a real filtration system.

The Aircare filtration system can capture allergens and the tiniest harmful particles dispersed in the air.

It comes with three different filters:

  • a combined filter composed of one G4 pre-filter + one high efficiency nanofibre filter, upstream of the heat exchanger at the supply air grille
  • a G3 filter upstream of the heat exchanger on the exhaust air grille

The optional HEPA filter now represents total filtration: it can filter particulate matter with a diameter of less than 0.3 microns. Something this tiny is invisible to the human eye, infinitely smaller than the diameter of a red globule (8 µm) or a human hair (65-78 µm). It is used in cleanrooms and operating theatres.