AirDoctor AD3000 / AD3500 FITS BOTH MODELS Genuine Replacement Carbon Gas Trap VOC Filters with Pre-Filter for Air Doctor 4-in-1 Home Purifier

True compatibility with AirDoctor AD3000 and AD3500 models - this is the only filter that is truly compatible with these units Updated design with foolproof alignment, simplifying the installation process Replace the dual-action Carbon/Gas Trap/VOC filters every 6 months (under normal use) for best performance Cutting-edge technology captures odors (cooking, pets), dangerous ozone (smog), and gases and chemicals (VOCs) such as formaldehyde Cost-efficient as these are the only genuine AirDoctor filters guaranteed to work with your AD3500 and AD3000 units, avoiding voiding your warranty with aftermarket filters