Active chilled beams supply fresh air to the space from a central plant room to maintain indoor air quality whilst providing cooling and/or heating using heat exchangers.
The fresh air is discharged into the beam mixing chamber via nozzles. As a result of this secondary air is induced via an inlet grille and then passes through heat exchangers into the mixing chamber. Here it is mixed with the fresh air and the total supply air is discharged horizontally into the space through integral slot diffusers.

Three nominal lengths each having heat exchangers in two widths and three nozzle options, one of these in a two-slot configuration, provides optimum selections to meet fresh air flow rate and thermal capacity requirements whilst exhibiting low differential pressures and sound power level characteristics.
There are two types of heat exchanger, one is a two pipe system for cooling, heating can be provided using a changeover mode. The other is a four pipe system which enables any room to be cooled or heated independently of other rooms. Operation below the dew point (wet operation) must be avoided.