Leaks in the area of walls, roof, and ceilings can lead to energy loss and structural damage. The tightness of the building is checked using the Blower-Door method. This allows the building to be repaired before the final interior work and application of the exterior plaster.
Three different stationary ventilation systems are installed for research reasons.
Opening and closing window sashes ensure the necessary air exchange.
Ventilation systems with heat recovery also use part of the energy of the interior air. The controlled exchange of air is achieved by the ventilation system with a radial fan. In a cross plate heat exchanger, the outside air flowing into the building is heated by the inside air flowing outwards.
The third variant of ventilation is equipped without heat recovery and is located in the window area.