Impact of ventilation systems on energy and IAQ performance

The study aims at quantifying the impact of the retrofit of ventilation systems from the energy, IAQ (Indoor Air Quality) and health perspective. In a first part, the French market has been defined (number of each ventilation system installed in existing building). Both qualitative and quantitative studies of malfunctions noticed on ventilation systems have been made.
In a second hand, the influence of ventilation retrofitting on the building energy performance
has been evaluated. The impact of implementing innovative techniques (i.e. decreasing the fan
absorbed power) has also been studied.
Although the study has been held on the French market, it gives an idea of the main trends and results that regulators may expect when acting on ventilation systems in retrofitting strategies.