General description Improve your indoor air quality with the vhbw 3 Part Filter Set, designed specifically for the IQAir HealthPro 250 Air Purifier. This high-quality filter set ensures reliable performance by efficiently removing dust, pollen, allergens, bacteria, mould spores, smoke, fumes, chemical vapours, and unpleasant odours, providing clean and healthy air at home. For optimal results, it is recommended to replace the filters regularly based on usage. Technical specifications Gas & Odour Filter: Dimensions (L x W x H): 33.5 x 32 x 10 cm; Material: Activated carbon and aluminium oxide pellets; Colour: Brown Pre-Filter: Dimensions (L x W x H): 33 x 33 x 7.7 cm; Filter classification: F8 fine dust filter (particle 1 up to 10µm); Efficiency: > 55% for particles 0.3 µm; Filter surface area: 2.8 m²; Material: Fleece/plastic; Colour: White; Replacement cycle: every 12 - 18 months HEPA Filter: Dimensions (L x W x H): 33 x 33 x 12 cm; Efficiency: > 99.97% for particles 0.3 microns;