Demand Controlled Ventilation


Save energy without compromising the indoor climate

Naturally we want the rooms we use to be ventilated and fully air conditioned for the best comfort and health. However, in most rooms the level of activity varies over the day, which means we frequently ventilate empty rooms as if they were fully occupied.

Research in e.g. schools show that the degree of occupation in different types of spaces is generally low, which means a system that adapts the ventilation and air conditioning according to the demand can save up to 80% of the fan energy and 40% of the heating and cooling energy. Furthermore, the system usually requires smaller ventilation units and chillers, which reduces investment costs. The same applies to many other types of premises, for example, offices, housing and hotels.

What do DCIC, DCV, VAV and CAV mean?

A number of concepts are used to describe the different principles of ventilation control. It may be difficult to distinguish between them, but in general they can be described as points on a scale, from basic to advanced:

DCIC (Demand Controlled Indoor Climate), with the new generation of WISE a complete demand controlled solution can be offered. Not just for ventilation, but for the whole indoor climate, with unbeatable possibilities to combine airborne and waterborne products.

DCV (Demand Controlled Ventilation), system with several different operating modes which adapts the air flow and temperature depending on the demand and occupancy status in the room.

VAV (Variable Air Volume), system with a basic form of demand control where the air flow is adapted according to e.g. the temperature or air quality.

CAV (Constant Air Volume), the simplest type of system, without demand control, with constant air flow in the premises.

In general terms, it is possible to attain greater energy savings and an improved indoor climate with a more advanced system. Of course, there are also applications where the more basic systems work perfectly. VentPro therefore offers suitable products and control systems for each level. With the new generation of WISE you can also manage different levels in one and the same control system!

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