Hybrid ventilation expectations among Finnish designers and decision makers

An interview survey was carried out among Finnish leading designers and decision makers on the expectations and barriers of the use of hybrid ventilation in office and educational buildings. The purpose was to support the technical part of the project where new ventilation systems will be created and evaluated. The results show that an increase in the use of natural forces in ventilation of buildings is expected. The hybrid ventilation can be well accepted by the users because of low noise level, feeling of natural ventilation and the possibility of user interaction. It is expected that hybrid ventilation is especially attractive in combination with daylighting, atriums and double facades. It is also believed that the main problems like preheating of the supply air, filtering as well as problems with heat recovery can be technically solved with satisfaction. The building regulations were not regarded to be a major barrier for the acceptance of hybrid ventilation.