Accessories for Airmaster decentralised ventilation units

Airmaster offers various accessories and, of course, spare parts for our ventilation units and cooling modules. Ventilation units and cooling modules are supplied with filters that comply with the new filter standard, EN ISO 16890, and we recommend using filters of the same quality when changing them.

The Airmaster-designed façade ventilation grill, Boomerain, is available in Ø160, Ø250 and Ø315, and we also offer a number of products for mounting and ducting through the roof.

Filter classifications

The table shows the old classifications for EN 779:2012 compared to the new classification for EN ISO 16890.

It is not possible to translate the new classifications directly, but the table shows how Airmaster translate the classification in proportion to each other.

Classification cf. EN 779:2012

Classification cf. EN ISO 16890


ISO ePM10 (>75%)


ISO ePM1 (>55%)


ISO ePM1 (>80%)

Airmaster supplies particulate filters which comply with the new filter standard, EN ISO 16890.

EN ISO 16890 use new descriptions which classify the efficiency of the filtration in proportion to the particle size. PM1, PM2,5 and PM10 indicates the particulate matter size in μm. 10 μm is the largest particle and 1 μm is the smallest particle. In front of the PM an e is given (ePM) which indicate the efficiency of the filtration in proportion to the specific particle size and is given in %. For example, a filter which is classified as ePM1
(>55%) capture more than 55% of particle size 1 μm.

The ISO 16890 classifications mentioned are the filter classes we use most. Other filter classes can be supplied on request.

Airmaster air handling units are now available with three different exchanger solutions:


STANDARD: counter-current heat exchanger

NEW: enthalpy heat exchanger solution

NEW: combination heat exchanger made up of an enthalpy heat exchanger + Airmaster’s standard counter-current heat exchanger.

The enthalpy solution is particularly suited for extremely cold climates such as northernmost Scandinavia or mountainous regions such as the Norwegian interior or the Alps.

A combination heat exchanger is a cross between these two types, meaning that it has a higher impact on temperature than an enthalpy-only exchanger but a reduced effect on humidity levels.

The combination heat exchanger is ideal for inland regions of Central Europe where, although cold, dry periods can occur, the climate is not considered extreme.

The combination heat exchanger is also ideal for coastal areas with a moderate climate if you want to be certain of maintaining a higher-than-normal indoor relative humidity (over 40%) at all times.

Output and efficiency

Due to the lower temperature efficiency ratio of the enthalpy exchangers, the maximum output of an enthalpy-only exchanger is lower for AM 150 and AM 300 to comply with Ecodesign Directive requirements. Otherwise, the air handling units operate normally.


Maximum output of an enthalpy-only exchanger:

  • AM 150: 100 m3/h
  • AM 300: 190 m3/h


A combination heat exchanger can maintain these normal outputs for all Airmaster air handling units.

Ready for a breath of fresh air

At Airmaster, we are “decentral” through and through. We are unrivalled when it comes to creating the best indoor climate and optimal well-being because we take each room and its occupants into account – and because we constantly strive to improve on what we do.

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