*From the air that passes through the filter. Overall particle reduction depends on many factors including the amount of air processed, the pollutant type and the pollutant introduction rate into the environment.
**When operated with the odor reducing pre-filter. It is recommended that the pre-filter be replaced every 3 months to effectively reduce common household odors and gases in a room. This product does not reduce or absorb carbon monoxide gas. Make sure gas appliances are well ventilated.
***Based on 11/10 AQS survey results reporting 124 out of 172 (72%) of surveyed Allergists that recommend an air purifier to their patients, recommend "Honeywell" air purifiers.