vhbw - the clever way High-quality air filter for minimising dust hazardous to health During renovation, construction or DIY work, dust particles are produced which, especially in closed rooms, can be harmful to health. Our pre filter for air purifiers provides a simple solution to this problem by removing impurities from the air safely and thoroughly. Its uniform size pores trap large dirt particles before the air is passed on to the main filter. The filter minimises airborne and harmful components efficiently and reliably and no additional tools are required for the installation. Please note: Only regular filter change ensures that high-performance filtration is maintained. CONTENT OF DELIVERY: - 4x pre filter TECHNICAL DETAILS: - Filter class: F8 fine dust filter (PM1 to 10µm) - Efficiency: > 55% particles 0.3 µm - Filter surface area: 2.8 m² - Dimensions (L x W x H): 33 x 33 x 7.7 cm - Material: plastic / fleece - Colour: white - Weight: 400 g - Replacement cycle: every 12 - 18