A lot more importantly, the AirDoctor AD3500 has every thing you might have to battle airborne allergens: a pre-filter that traps big particles like dust and hair, a dual-motion carbon/VOC filter that absorbs odors and dangerous gaseous compounds, and an UltraHEPA filter effective at trapping 99. SwitchBot Air Purifier Table: https://saulh270lve7.thelateblog.com/profile