- Find your air purifier's model number by checking the label (on the back or underside) or the manual.
- Find the filter with the same name as your air purifier. “RF” stands for “replacement filter.”
For example, if you have the Core 300, you need a “Core 300 replacement filter” (also known as “Core 300-RF”). If you have the LV-PUR131, you need an “LV-PUR131-RF.” To maintain the performance of your air purifier, only use official Levoit filters.