Through the use of a high-powered fan and optimised air flow within the hood, a Bosch cooker hood with EcoSilence Drive™ motor technology saves over 80% in energy during average operation* compared with a tradition Bosch cooker hood. In addition, the EcoSilence Drive™ motor causes no mechanical friction. So instead of wasted energy, wear and noise, that means efficiency, durability and quiet running. And you can really hear the difference. * With an average fan operation of one hour on level 2 per day and with the light on for 2 hours per day.