Alternating flow ventilation unit with heat recovery for decentralized controlled mechanical ventilation systems dedicated to a single room. PULSE 30A guarantees a maximum air exchange of 30 m³/h in alternating operation, suitable for rooms up to 10 m². The unit is only suitable for so-called noble rooms (living rooms, bedrooms, studies); in rooms such as bathrooms and kitchens, the use of simple extractors is recommended.