A lot more importantly, the AirDoctor AD3500 has almost everything you might need to combat airborne allergens: a pre-filter that traps significant particles like dust and hair, a dual-action carbon/VOC filter that absorbs odors and dangerous gaseous compounds, and an UltraHEPA filter effective at trapping 99. Based on the EPA, https://pauld715ueo0.wikicarrier.com/user