Definition In new houses with good insulation against outside noise there is hardly any natural ventilation. This can lead to high humidity and low oxygen levels. To eliminate the possibility of harmful effects developing, it is essential to introduce fresh air. Our comfort ventilation system generates a steady, slow stream of fresh air (5–10 times slower than conventional air conditioning systems). This guarantees a pleasant and hygienic indoor climate with no draughts. The fresh air is filtered and, according to season, can be pre-heated or pre cooled. The energy from the waste air can be recovered and then used to pre-heat the fresh air, for the water heating system or for central heating. You can enjoy an ideal indoor climate and yet all this consumes hardly any energy. Our ventilation equipment extracts air from specific rooms and channels fresh air into them (e.g. kitchens and bathrooms).