KE-Low Impulse® System

The KE-Low Impulse System is produced using round ducts (Ø), half-round (D) or quarter round (½D) ducts.

The air distribution principle for horizontal low impulse systems is based on passive thermal displacement where the air is supplied at a lower temperature in relation to the air in the room.


Because of the difference in density, with the cooled air being heavier than the warmer air in the room, the room air is displaced below the duct while the supply air continues moving towards the floor.



The air flow in the room is then based on natural air movements where the air is driven by the difference in density and convection streams from heat-releasing activities and processes, hence the term "passive thermal displacement".

A high level of heat activity from heat sources generates bigger convection currents, resulting in the air rising more strongly and greater entrainment of the air around the source. This then results in stratification in the ventilated room where heat and pollution are drawn away from the occupied zone and extracted under the ceiling.

A low impulse system can only be used for cooling purposes or for distributing large volumes of isothermal air, as warm air will settle under the ceiling like a blanket.

When this happens, the supply air is short circuited, which means a waste of energy.

Read more about the KE-Low Impulse System in our catalogue



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