Mafell | S35M M Class ExtractorThe all new S 35 M combines outstanding suction performance with great ease of use. Thanks to Permanent Clean functionality, a nano coated main filter and intelligent iPulse sensor technology, all types of dust in dust class M are permanently and reliably removed. The extent of filter contamination is monitored by special sensor technology. As a consequence, cleaning takes place only when the filter is actually contaminated, and not at fixed intervals