General description With the vhbw combi filter, you can easily replace the filters of your Doctor-San X3 and X2 air purifiers. This high-quality filter ensures efficient filtration performance, capturing up to 99.97% of dust, pollen, smoke, odours, and pet hair from your household air. The combi filter consists of a pre-filter, HEPA filter, and activated carbon filter, providing comprehensive air purification. Technical specifications Filter class: H12 Diameter: 20 cm Internal diameter: 11.7 cm Height: 29 cm Colour: black / white Replacement cycle: every 3 - 6 months Includes RFID chip Compatibility and accessories Compatible with Doctor-San X3 and X2 air purifiers Replacement for SCG4021GL Installation Easy to install Usage Replace filters every 3 - 6 months for optimal performance