Search·AirDoctor
Use this page to see which air purifier models take this cartridge, check suggested change timing when we have it, and open retailer links when you’re ready to buy.
Brand
AirDoctor
This filter’s OEM number is linked to the purifier models below in our reference. If yours is listed, open buying options when you’re ready—always match the number on your current cartridge.
ADF401
AirDoctor 4-in-1 UltraHEPA + carbon replacement
Replace about every 12 months
Fits these models (1)
Notes & next steps
Search again if you need a different model or part number.
Published ADF401 family for AD3000-class units; verify model sticker vs AD3500.