Exact model stated by the manufacturer

GermGuardian AC4300BPTCA replacement filter

Documented OEM reference: Filter B · FLT4825

Guardian Technologies' Filter B page explicitly lists the full AC4300BPTCA model code as compatible with FLT4825. The separate AC4300 family page lists other Filter B variants, but does not establish those variants for this exact CA-suffixed model; this row records only FLT4825.

Limits. The exact compatibility line comes from a US manufacturer page despite the CA suffix. It does not establish Canadian stock, shipping, warranty, or a Canada-market fit source. Do not extend this exact mapping to other Filter B variants. Aftermarket fit and performance are untested.

Guardian Technologies Filter B page · US ↗

Source market: US · Checked 2026-10-20. No stock, price, or seller claim is made. Fit is not filtration performance.

Other models listed for the same part

GermGuardian AC4825E

One part listed for several models does not make those purifiers interchangeable.

Check the full model label in the finder →

Related guides

GermGuardian

GermGuardian replacement filters by model →

Cite this page

Use this text to cite the page. The last-updated date is the date of the latest change to its content.

Filter Ledger. “US GermGuardian AC4300BPTCA Filter”. https://filters.toolatlas.app/en-us/filters/germguardian-ac4300bptca/. Last updated October 23, 2026.