After using Filtrete filters from 1000 to 2200, I have found the 1500 best for us. My furnace man installed another brand when he did the fall checkup. I noticed more dusting to do, and waking up congested. After 30 days, I decided to replace it. It tore coming out of the slot.. I trashed it and put in the 1500. Our air quality is great, I know the 1500 by the bright purple package. I love it. It's a good investment for my family. My adult children use it too in their homes!.