Exact model stated by the manufacturer
GermGuardian AC5109 replacement filter
Documented OEM reference: FLT5100 / FLT5100PT / FLT5100SM / FLT5100VO / FLT51CB4 / LB5100
Official AC5109W page names the canonical AC5109 family and Filter O.
Limits. Official manufacturer compatibility evidence checked on 2026-10-23; regional or bundle suffixes are retained where the source names them.
Guardian Technologies official compatibility/product page ↗
Source market: US · Checked 2026-10-23. No stock, price, or seller claim is made. Fit is not filtration performance.
Check the full model label in the finder →
Related guides
- How to Find Your Air Purifier Model Number
- Filter Fit vs Filtration Performance
- Air Purifier Filter Light and Reset Guide
- Clean and Replace Air Purifier Filters
GermGuardian
GermGuardian replacement filters by model →
- GermGuardian AC4825E
- GermGuardian AC4300BPTCA
- GermGuardian AC4825
- GermGuardian AC4900
- GermGuardian CDAP4500
- GermGuardian AC4870
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 AC5109 Replacement Filter”. https://filters.toolatlas.app/en-us/filters/germguardian-ac5109/. Last updated October 23, 2026.