Verified match
Holmes CAP531-U Replacement Air Purifier Filter
Your Holmes CAP531-U takes the AIRx AIRx Replacement HEPA Filter for Holmes AER1, 2-Pack.
Also sold under these part numbers
85857 · AER1
AIRx AIRx Replacement HEPA Filter for Holmes AER1, 2-Pack
Amazon
In stock
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| Retailer | Price | Rating | Stock | |
|---|---|---|---|---|
Amazon | — | — | In stock | View on site |
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AIRx AIRx Replacement HEPA Filter for Holmes AER1, 2-Pack
On Amazon
Compatibility verified from manufacturer part data and published retailer compatibility records. Always confirm against the sticker inside your appliance before ordering.