When replacing windows and doors with new ones or when building low-energy house, we can soon get an interesting realization: the house is almost hermetically sealed and has no  uncontrolled ventilation, which is good from an energy point of view, but bad from the microclimate point of view and, consequently, from the point of view of the comfort of our stay. Without fresh air even flowers refuse to grow. It is therefore necessary to consider the ventilation of the house.

The best way is ventilation controlled via the ventilation system, which initially cleans the outside air (filters), then  appropriately heats / cools filtered air and  delivers it to where you want it and as much as you want it. At the same time the ventilation system sucks all the dirty and moist air (bathroom …) and brings it out of the house. Even before that, of course, the system ensures that the waste air  heats (if necessary) cold intaken air (recuperation).