Air inside a house has to be renewed. In that case why not take advantage of the situation to supply air that has been either cooled or warmed depending on the season? That's the principle behind Températion that offers the performance of double-flow ventilation and thermal comfort whatever the season. The advantages are numerous: - cooling of the air, warming the air by heat recovery from the exhausted air, self-regulating air-renewal, air, filtration, comfort, etc.