It is a process of recovering energy from used air using a recuperator. Mechanical ventilation with heat recovery supplies fresh outside filtered air while removing high CO2 exhaust air. This exchange takes place throughout the year and in all rooms. Without opening windows, without energy loss, everywhere, always you and your loved ones breathe fresh filtered air. This is a great comfort that cannot be obtained in houses with gravitational ventilation. In winter, thanks to recuperation, you can save up to 50% of the building's heating costs.