Bionaire® EverFresh™ Air Exchange System

The Bionaire EverFresh Air Exchange System is a revolutionary way to ventilate your home, bringing fresh air into your home without bringing in cold, dust, or pollutants

Holmes EverFresh Air Exchange System Whisper silent unit mounts in minutes Fits most double-hung windows 26" to 38" wide Patented Energy Recover Technology transfers the warmth (or coolness) and moisture from the indoor air to the fresh, incoming air. So the air in your room stays at your set temperature and doesn't waste energy. Discreet "service" message for cleaning and maintenance alerts