Purifier Filter Match
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  2. 2Your part
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GermGuardian replacement filter

GermGuardian Filter B towers

GermGuardian lists HEPA PURE Filter B combination filter, FLT4825, for the US model codes below. The Amazon action searches this reference; no exact retail product or pack has been approved.

Models listed by the manufacturer

  • AC4825E
  • AC4825W
  • AC4870
  • AC4820
  • AC4880
  • AC4300BPTCA
  • AC4300WPT
  • AC4900CA
  • AC4850PT
  • CDAP4500BCA
  • CDAP4500WCA

Models checked: US. Match the full code on your label.

Where is my model number?

Before you buy

  • Do not infer another suffix from the shorter generic Model Compatibility table.
  • Filter B specialty references FLT4850PT, FLT4825SM and FLT4825VO are separate products.
  • These manufacturer-listed model codes cover US specifications. Another regional variant needs its own check.
  • The Amazon action is a reference search; no exact retail product, seller or pack has been approved.
Find the complete model code
  1. Read the complete GermGuardian model on the purifier label and retain every letter, digit and suffix.
  2. Match the label with one of the manufacturer-listed US codes on this page.
  3. Compare FLT4825, components and quantity on the final merchant listing; the search does not approve the listed item or pack.
Filter and fitting details
  • The manufacturer feature list names the eleven GermGuardian codes retained here.
  • FLT22CB4 is a separately referenced carbon pre-filter replacement set; it does not replace the FLT4825 HEPA component.

Manufacturer sources

Documentation checked Oct 12, 2026 by Codex (manufacturer documentation). We have not physically tested these filters.

GermGuardian filterFLT4825
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