Method version 1.0 · Reviewed Sep 2, 2026
The verification sequence
- 1Lock the input.
Manufacturer and exact purifier model, including suffix.
- 2Separate filter roles.
Replaceable, washable, and permanent parts remain distinct.
- 3Require an official orderable key.
The manufacturer must connect the exact model to a named filter or SKU.
- 4Record package contents and timing.
Only facts visible in current official pages or manuals are included.
- 5Publish the boundary.
Variants or nearby model names that remain unresolved are labeled unsupported.
Current source register
| Record | Official source | What it closes | Last checked |
|---|---|---|---|
| Levoit Core 300-P | Levoit product page | Core 300-P-RF, packaged stages, compatibility, 6–8 month guidance | 2026-09-02 |
| Winix 5500-2 | Winix Filter H page and official 5500-2 manual | Filter H / 116130, package roles, wash/replace distinction, timing | 2026-09-02 |
Supported, needs more input, or unsupported
The exact manufacturer-model pair has a current official key and a closed package role.
The user selected a manufacturer but not the full model label.
The key, role, suffix, or variant is unresolved. No shopping link is produced.
Corrections and change control
A supported record is disabled if its official source disappears, the key changes, or the package can no longer be matched without an additional serial or configuration input. A corrected record must preserve the old check date and document the new source date.
Retailer inventory and price are not treated as compatibility evidence. Purifier Part Check can add a retailer link only after the information result is complete on its own and the commercial relationship is disclosed.