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Developed together with the German filter specialist Freudenberg, the Dual Filter™ is the key to the outstanding air purification performance of Roger Little. The unique filter is made in Germany and combines a HEPA and an activated carbon filter. The H12 HEPA filter removes 100% of 0.255-micrometre particles (tested based on DIN standard 71460-1:2006), including pollutants such as fine dust, pollen, viruses and bacteria, from the air.
In contrast, the activated carbon filter adsorbs gases, foul odours, tobacco smoke, formaldehyde, toluene, and volatile organic compounds present in the air.
Compared to an H12 HEPA filter, the H14 HEPA filter has a greater density, enabling more particles to be filtered from the air per air change. The Dual Filter™ must be replaced every 8 - 12 months, depending on its exposure to air and gases. Roger Little reminds you exactly when the filter needs to be replaced.
another good purchase