Nexxt achieves heat recovery efficiency of up to 90%. Heat transfer is made via a cross-flow heat exchanger or optionally via a cross-counterflow heat exchanger. Power input commences as of 5 Watts and volume flows of over 90 m³/h can be generated.

The ego also operates in accordance with the principle of the regenerative heat exchanger

Silvento extract ventilation V 30/60 High Quality extract ventilation