BSK Zephyr Mini recovers heat using a 2-way fan and a ceramic heat exchanger core. The device operates on a 70-second cycle, alternating between extracting and supplying air. During the extraction phase, warm air from the room heats the ceramic core. When the airflow reverses, fresh air from outside passes through the heated core, entering the room in a conditioned state. With power consumption of just a few watts and thermal efficiency reaching up to 90%, the BSK Zephyr Mini helps you save energy while ensuring effective ventilation. Multiple units can be connected via Wi-Fi and controlled using the included IR remote.