Air purifier filters
Filter replacements are where most purifier performance is won or lost. The best shortcut is a simple cadence: keep the prefilter clean, replace carbon when odors return, and replace HEPA before airflow collapses.
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Most common filter stack
- Prefilter (washable) — protects the main filter
- Carbon layer — odors/smoke gases (usually fades first)
- HEPA — dust, pollen, fine particles
Fast fit checks
- Match the exact model name/number.
- Check filter height + locking tabs.
- Pick the filter type for your use (pet vs smoke vs standard).
Popular models
Choose your model for a filter fit checklist, replacement timing, and quick links to compatible replacements.
Levoit
Core 300 / Core 300S
Levoit Core 300 units are common worldwide, which means lots of filter options. The key is choosing the right filter type (standard vs toxin/smoke vs pet) for your environment and replacing on schedule.
Open model guide
Coway
AP-1512HH Mighty
The Coway Mighty is known for strong performance and a clear replacement schedule. The prefilter is washable, while the HEPA and carbon filters are consumables that should be replaced to maintain performance.
Open model guide
Winix
5500-2
The Winix 5500-2 uses a prefilter, a carbon filter layer, and a true HEPA filter. Replacing the carbon layer on time is the fastest way to reduce odors and keep the unit feeling 'fresh'.
Open model guide
Blueair
Blue Pure 211+
Blueair units are easy to maintain, but you must match the filter size to your exact unit. If your purifier has a washable prefilter wrap, cleaning it regularly keeps airflow high.
Open model guide
Filter light reset help
Many purifiers use a simple hold-to-reset pattern. We keep a general guide with safe steps and brand-agnostic troubleshooting.
Read the reset guide