QLI induction type displacement flow diffusers with water coil are used in air/water air-conditioning systems. They combine the advantages of low-turbulence displacement flow diffusers with the energy benefits of using water as the main cooling medium.

The primary fresh air volume flow rate required is supplied through a circular duct containing nozzles. The secondary air induced into the unit from the room passes through a water coil where it is either cooled or heated.

In the mixing zone of the QLI the secondary air is mixed with the primary air and discharged to the room through a perforated plate and then a grille located in the covering case.

The integrated heat exchanger is available in 2-pipe configuration for connection to a cold water system or in 4-pipe configuration for connection to cold and hot water.