EPBD, the European energy in buildings policy, has set the goal of achieving a drastic reduction in the energy consumption of our buildings. By 2018, all public buildings must be classified as "nearly zero-energy buildings" and by 2020 all new build must be "nearly zero-energy classified", which implies a dramatic reduction in the energy used to heat and ventilate our homes.
One way of achieving these energy savings is to increase the insulation of buildings and make them even more airtight, in order to prevent heat losses.
At the same time it is necessary to ensure sufficient air changes in the home to remove humidity, gases and stale air and to supply fresh air and give a good indoor climate.
Airtightness in buildings sets higher requirements for ventilation control, so as to preserve a balance between extraction and supply. At the same time, the requirement for energy savings will make it compulsory to have on-demand ventilation in every flat.