The Elica KIT016775 Recirculating Kit is required to install your NikolaTesla Fit in a recycling configuration. This filter is suitable for the most difficult cooking environments, given its superior ability to filter and purify the air. The new Elica technology allows it to achieve a filtering efficiency of 80% compared to the market average of 60%. The ceramic activated carbon filters eventually become saturated after a period of use, depending on the type of cooking and the frequency with which the grease filters are cleaned. These odour filters can be thermally regenerated every 2/3 months in an oven preheated to 200°C for one hour. Regeneration allows a maximum filter life of 5 years.