The fresh air is blown in at a relatively high speed and “clings” to the ceiling before slowly descending, which is known as the Coanda effect.
The Coanda effect “entrains” the air in the room, ensuring that the fresh air and the room air are mixed efficiently. The entrainment of the air in the room ensures uniform air quality in the room, while reducing the air velocity of the supply jet. This way, draughts in the occupied area are avoided.
Proper installation and adjustment are, however, crucial to avoiding draughts.
Wall-mounted Airmaster ventilation
All wall-mounted models ventilate according to the mixing principle, in which fresh air is fed into the room at ceiling level, exploiting the Coanda effect.
The AM 1000 air handling unit is available with an adaptive inlet, which adjusts the throw in relation to the airflow relative to the length of the room.
Wall-mounted Airmaster ventilation with inlet stream seen from the side
The mixing principle is also used for Airmaster’s floor-standing models (AM 900, AM 1200), with fresh air fed upwards into the room to exploit the Coanda effect.
Adjustable inlet opening
Floor-standing models AM 900 and AM 1200 are fitted with adjustable inlet openings. The opening can be adjusted according to requirement, ensuring the right throw length according to the size of the room.
The throw length can be easily varied by changing the inlet opening/louvre angle.
Floor-standing AM 900 - displacement ventilation with inlet stream seen from the side.
Airmaster’s floor-standing model AM 900 is also available as a displacement model. The displacement ventilation principle feeds fresh air into the room at low velocity at floor level. The fresh air is blown in at a temperature a couple of degrees lower than the
The air is distributed over the entire floor due to the difference in density between cold and warm air. The low inlet velocity avoids draughts in the room.
Floor-standing AM 900 - displacement ventilation.