Swap stale air for fresh... and save on heating. The Lossnay Fresh Air Energy Recovery Systems set a new standard in ventilation by recovering heat from the air inside your home or office and transferring it to fresh, dry air introduced from outside. Not only providing energy recovery savings in winter by warming the cold fresh air to an acceptable level but also providing the same excellent energy efficiency in summer. Lossnay heat exchangers have an efficiency of approximately 82% thereby eliminating the need for additional electric elements.