Under sill induction units Type IDB using air-water systems provides a comfortable air conditioning of rooms with a high cooling load. They combine the air flow characteristics of quasi displacement flow with the energy benefits of load dissipation using water.

The fresh air is discharged into a mixing chamber through nozzles. As a result of this secondary air is induced via an inlet grille and then passes through heat exchanger into the mixing chamber. Here it is mixed with the fresh air and the total supply air is discharged into the room as a quasi displacement flow system.

The heat exchanger is available for two pipe systems using chilled water or for four pipe systems using chilled and hot water.