Air purifier filters
The filter sits behind the front or back cover of the purifier.
Find the right fit
- Model number. Start with the purifier model number, on a label on the bottom or back. Unplug the purifier before you look inside.
- Part number. Then the part number printed on the old filter.
- Two or more retailers. Look the model or part number up at two or more retailers. Buy the one listed as a fit for your model, and check the printed size or part number on the box matches.
What to look for
- A filter listed for your model.
- Some units also take a pre-filter, a thin outer layer that catches big dust. Rinse or vacuum it between changes if the manual allows.
- Write the date on the new filter.
When to swap
As often as the filter or the manual says.
Where to buy
Set a reminder for the next one in the Reminder Tool or the home hunt.