Comfort and energy savings

The secrets of demand controlled ventilation (DCV)

By offering airflow adapted moment-bymoment to occupants’ needs, Aereco demand controlled ventilation systems reduce thermal losses due to ventilation, improve indoor air quality and limit moisture problems.

Invented by Aereco in 1984, humidity sensitive ventilation is still regarded as a major technological breakthrough in demand controlled ventilation today.

Intelligent airflow distribution

The Aereco process optimises air distribution within the dwelling : thanks to its humidity sensitive air inlets, it directs the most air to the rooms that need it most. In this way, it limits heat loss in unoccupied rooms and provides good ventilation where it is needed.


Because the number and activity of occupants in dwellings vary from moment to moment,so does the need for air renewal.


To meet this variable need, Aereco demand controlled ventilation systems provide an airflow directly determined by the level of pollution inside each dwelling. An increase of indoor pollution is usually accompanied by an increase of relative humidity, which causes the opening of humidity sensitive air inlets and demand controlled exhaust units. In residences where occupancy is lower, the terminals open less, saving energy.

Pressures and airflows are balanced


In apartment blocks using using passive stack ventilation or hybrid ventilation, the stack effect naturally favours the lower floors over the higher floors, giving more pressure to the first floors.

The humidity controlled ventilation system compensates for the lack of pressure at the upper floors by opening more (for a given humidity), balancing the airflows along the duct column.

For comparable occupancy on each floor, the Aereco process attenuates airflow differences, whereas constant ventilation leads to larger airflow disparities between floors.

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