// 11.2.2016

AIRMASTER AM 1000 – A revolution within decentralised ventilation

AIRMASTER revolutionizes with the new AM 1000 decentralised air handling unit.

The AM 1000 can satisfy modern demands for air quality and low noise levels – in practical terms, this means about 950 m3/h (or 260 L/s) at 30 dB(A). At the same time, the AM 1000 heat exchanger has an efficiency in excess of 80% (on dry bulb)  and a fan SFP of 700 W/(m3/s), which makes this unit attractive to designers and facilities managers.

ACTIVE NOISE CONTROL (ANC)Steffen Pedersen, Udviklingsingeniør
AIRMASTER commissioned a scientific research project from the Acoustics Department of Aalborg University. The researcher from those days – Steffen Pedersen – is now employed at Airmaster A/S as an R&D Engineer, and his research has been transformed into applied technology.

The AM 1000 contains four sets of microphones and speakers that cancel out low-frequency noise by active noise reduction, so that noise emissions at full throughput reaches a maximum of no more than 32 dB(A).


Another significant challenge was to supply a typical classroom with a maximum of 950 m3/h of fresh air at a temperature lower than room air, without producing draughts. For energy saving reasons, demand control of air volume is often specified, meaning that flow might be reduced to only 30% of maximum. However, the air distribution pattern which may be optimized for the higher air volume may well be unsuited to the lower volume flow.

To overcome this problem,  AIRMASTER  R&D Manager Erik Bjoern invented a new design of  diffuser which can adapt the air distribution pattern to air volume and room geometry. The fundamental concept is to divide the airflow in two separate jets:

For large air volumes –High velocity jets diverge to spread air widely across the whole ceiling, thus entraining much indoor air.       For smaller air volumes – Low velocity jets converge to form a concentrated flow.

The Adaptive Airflow™ principle utilizes fluid dynamic principles to create different  air distribution patterns across the ceiling. In this way, a constant throw is maintained throughout the full turndown.  In addition, it was found that draught problems are avoided.


The AM 1000 is a modular system. The unit consists of  four parts that makes handling much easier.  The modular system has made it possible to have additional side locations for the spigots for air intake and exhaust. The designer, R&D engineer Anders Vestergaard, has succeeded in creating a very flexible, very air tight unit despite the modular compartments.

In a recent test exercise, an AM 1000 took just 3 hours to install, from delivery at site to full commissioning.  The modular approach has also proved its value when it comes to installation in upper floors, as handling is considerably simplified.
Below, the AIRMASTER R&D team - with an AM 1000 prototype.

Airmaster Udviklingsafdeling


Soon AIRMASTER will introduce a new internet-based monitoring and management system, named Airlinq Online. Via Airlinq Online it becomes, via a standard internet connection, possible to see the operation and hardware data, update software, like AIRMASTER or the user's operating personnel can do remote support. More information in the next coming newsletter.

If you want to know more about the Airmaster AM 1000 decentralised air handling unit, please feel free to contact us at tel. +45 98 62 48 22 or info@airmaster.dk
Read more at www.airmaster-as.com

Picture above: AM 1000, integrated, classroom

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