AirDoctor 3000 Replacement Filters
$69.90
UltraHEPA 
Replacement Filter last for one year (under normal use) and are designed to capture ultra-fine PM 2.5 particles from the air. That is 100 times smaller than regular HEPA filters.
Pre-Filters are designed to remove larger contaminants like dust and animal hair. Includes 3 Pre-Filters. We recommend giving your Pre-Filter a quick vacuum once per month to help extend the life of your Filters. Please NEVER wash your Carbon/VOC or UltraHEPA Filters.
The dual-action Carbon/Gas Trap/VOC filters last for 6 months (under normal use) and removes toxic ozone, gas, odors and VOCs (volatile organic compounds). Comes with 1 Pre-Filter attached to main filter frame.