This section shows where to find the exact replacement filter for your air purifier model, compares OEM and reputable aftermarket options, and points to buying and installation guidance. Use the model-specific guides linked below for compatible part numbers, fit checks, and verified sellers. Each model page lists installation notes and links to current prices so you can buy the right filter with confidence.
Model-first orientation: a short roadmap
Start by confirming the model name printed on the unit or in the manual. Then open the matching model guide below: those pages list the compatible filter names/part numbers, what to check before you buy, and step-by-step installation notes. Each model page also includes links to verified sellers and current prices; we may earn a small commission when you purchase through those links.
Quick decision flow (3 steps)
- Confirm model: read the label on the back/bottom of the purifier or the user manual (model codes distinguish filter types).
- Open the model guide: follow the link for your model to see compatible filters, OEM part numbers, and aftermarket options.
- Decide and buy: compare OEM vs reputable aftermarket filters on the model page, then follow the purchase and installation links.
Jump to the model guide you need
Below are the compact brand and-use groups for quick scanning. Each link goes to a model-specific replacement guide with part numbers, installation tips, and seller links.
Levoit models
- Levoit Core 300 Replacement Filter Guide
- Levoit Core 400S Replacement Filter Guide
- Levoit Core 600S Replacement Filter Guide
- Levoit Vital 100S Replacement Filter Guide
Coway models
Popular single-room and budget choices
- Germ Guardian AC4825 Replacement Filter Guide
- Honeywell HPA300 Replacement Filter Guide
- Winix 5500-2 Replacement Filter Guide
Higher-capacity and specialty models
- Blueair 211i Max Replacement Filter Guide
- Medify MA-40 Replacement Filter Guide
- Shark HP102 Replacement Filter Guide
OEM vs aftermarket: practical tradeoffs
OEM filters give the clearest guarantee of fit and stated filtration specifications; aftermarket filters can save money but vary in quality. When evaluating non‑OEM options, check three things on the product page or listing:
- Explicit compatibility with your exact model number and part number.
- Filter type labeling (True HEPA or HEPA-equivalent) and any independent test data the seller provides.
- Return policy and seller reputation—prefer sellers with clear returns if the filter doesn’t fit or perform as advertised.
Model pages linked above summarize OEM part numbers and list reputable aftermarket brands where appropriate.
When to replace and basic installation cues
Follow the manufacturer’s recommended replacement interval on your model page. Common triggers that indicate replacement may be needed include a filter-replacement indicator light, noticeably reduced airflow, higher noise levels at the same fan speed, or visible heavy discoloration of the filter media.
Most replacement guides include brief installation steps; if your unit uses a multi-stage filter (pre-filter, activated carbon, HEPA), replace according to the model’s sequence and seating orientation. Never wash disposable HEPA filters unless the manufacturer explicitly states they are washable.
