4 pieces. ceramic recirculation filters in cassette. NikolaTesla (ex. NikolaTesla Fit). Durability up to 5 years
The high-performance ceramic recirculation filters can be regenerated in the oven for 40 min. at 200 degrees C and are thus effective for purifying the air for up to 5 years. Precisely these original filters purify the air by more than 80% at the first air flow.