The short answer
Find the model number on the label (usually on the back or bottom, or under the filter door), look up the maker's filter for that model, and check the generation: newer versions of the same purifier sometimes take different filters.
Find the model number
- Back or bottom label of the unit.
- Inside the filter door or on the old filter itself.
- The manual or the maker's app if the unit is connected.
Watch for generations
Makers often update a purifier and keep a similar name: a 'Max', 'S', 'P' or 'i' suffix can mean a different filter. Match the full model number, including suffixes.
Filter types
| Type | What it's for |
|---|---|
| Original / particle | General use: dust, pollen, dander |
| Pet / allergy | Extra pre-filter or carbon for pet odors |
| Smoke / toxin | Heavier carbon for smoke and VOCs |
| Odor / carbon-only | A separate carbon stage on some units |
Products mentioned
Questions readers ask
Can I use a different brand's filter?
Only one made for your exact model; check the fit and seal.
How do I know when to replace it?
Follow the unit's indicator and the maker's interval; replace sooner if the intake side is gray or the airflow drops.