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.
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.