Honeywell The Honeywell AirGenius 4 Air Purifier's patented ifD QuietClean filtration system helps capture up to 99.9% of microscopic particles from the air that passes through the filters. The Purifier can circulate the air in a large room up to 5 times an hour. It is Energy Star qualified and uses the same amount of energy as a standard light bulb. The smart LED controls do the thinking for you and feature 4 intuitive settings, sleep, allergen, general clean and max clean.