- The Dual Filter™ is a combination of a HEPA filter and an activated carbon filter
- The activated carbon filter adsorbs gases such as bad odors, volatile organic compounds, tobacco smoke, formaldehyde, toluene, etc.)
- The HEPA filter part filters viruses and bacteria as well as fine dust and pollen out of the air
- The Dual Filter™ will need to be replaced every 8-12 months
- Roger big requires 2 x Dual Filter™
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