It is really important to ventilate your house so that you avoid damp rooms and thereby, for example, mold. If there is not enough ventilation in a room, it can easily lead to damage to the house and inconvenience to the occupants. However, one must also be aware that the house loses a lot of heat by ventilating with the windows, and thus the heating bill can become quite expensive.
If, on the other hand, you acquire a ventilation system, many of the above problems can be solved. The system usually works in the way that it removes air from bathrooms, kitchens and utility rooms, as these are moisturizing rooms. The air is led through ducts back to the plant, where it "sends out" the air and takes in fresh air. However, the fresh air is first heated by the old air, and then it is cleaned of pollen, harmful substances and dust. In this way, the rooms remain heated, while the fresh air cleans out, so you avoid annoying problems with moisture.
You can get a lot of different ventilation systems, which can be adapted to both older and newer homes. In this way, all households can benefit from a facility, no matter what their needs may be.