Pre filter housing standard

Vitashield Intelligent purification automatically senses air quality and products Effective Filtration Size (in microns) >= 0.02 and for 0.3+ microns is 99.97%, 800 times smaller than PM 2.5 Purifies a standard room in just 12 minutes with a CADR of 270 m3/hour (Standard room size is 18 ft by 12 ft with an 8 ft ceiling height). Recommended room area: 226-333 sq ft. 4 Stage Filtration process through pre filter, activated carbon filter & double layered H13 Grade TRUE HEPA Filter 4-color air quality indicator gives real time air quality feedback, Packaging: > 90% recycled materials Removes 99.90% bacteria and viruses, tested to remove airborne H1N1 virus Removes 99.99% pollen and house dust mites, Allergy friendly quality tested by ECARF Philips is the no.1 brand in Air purifiers in India (Source: Euromonitor International Limited; Consumer Appliances 2018ED)