AmazingAir 3500 Carbon/Gas/Trap/VOC filterThe dual action Carbon Gas Trap VOC filter lasts for 6 months (under normal use) and removes toxic ozone, gas, odors and VOCs (volatile organic compounds). Time to Replace a Filter? No guesswork needed! AmazingAirs smart display will let you know exactly when its time for a filter change. A filter icon will light up on the control panel, so youll always stay on top of maintenance. Simply replace the used filter with a new one, then hold the Filter