Air & water
Air Purifier Replacement Filter Guide: Match Model, Code and Filter Set
Copy the complete purifier model and the code on the installed filter before shopping. A cartridge can fit the opening yet still omit a pre-filter or odor-control layer, so compatibility and filter-stack contents both matter.
Compatibility guide · Updated October 22, 2026Match your model to its refill
Start with the complete model on the purifier base. These Levoit examples show why the Core name alone is not enough: the 200S-P and 300-P families need different cartridges.
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Levoit Core 300-P or Core 300S-P
Core 300-family replacement filter
Levoit lists these two models together for its Core 300 replacement filter. Match your full model in the listing and choose the complete cartridge, not a loose filter layer.
Find Core 300-family replacement filter on Amazon Levoit Core 300-P / 300S-P compatibility →Levoit Core 200S-P
Core 200S-P replacement filter
Levoit specifies Core 200S-P only for this cartridge. Keep the 200S-P identifier in your search rather than selecting a similar cylindrical Core 300 filter.
Find Core 200S-P replacement filter on Amazon Levoit Core 200S-P compatibility →Have another model? Find its replacement
Find the right replacement
Find your model’s replacement
Enter the brand and model, or add a photo of the product label.
Fast rule: the exact model, cartridge or part code beats appearance. If the listing does not clearly name what you own, do not force the match.
Run the two-code compatibility check
Read the complete model from the purifier rating label and the full part or cartridge code from the installed filter. Confirm both identifiers in the current replacement listing’s compatibility details instead of relying on brand, shape or a broad “compatible” claim.
Product families can contain several sizes and generations that look nearly identical in photos. If the listing does not name the exact model or original filter code, keep looking rather than buying by appearance.
Compare the complete filter stack and seal
Check whether the original system uses one cartridge or separate pre-filter, particle-filter and odor-control layers. Confirm what the current package includes; a physically compatible frame may not provide every layer the original system used.
Compare dimensions, frame shape, gasket or edge seal, pull tabs and airflow direction. Remove shipping wrappers only when the manufacturer instructions say to install, and never trim or force a cartridge that is not specified for the purifier.
Install and plan the next reorder
Follow the purifier instructions for orientation, panel closure and indicator reset. Resetting a light is not a compatibility test; do it only after the correct replacement is seated as directed.
Replacement timing varies with the machine, environment and usage. Use the purifier indicator and manufacturer guidance rather than a universal calendar rule, and keep unused multi-pack filters dry and sealed until needed.