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GermGuardian AC4300 replacement filter

GermGuardian AC4300 has 5 primary replacement filter parts: FLT420B, FLT4825, FLT4825SM, FLT4825VO, FLT4850PT. Match the role and part number before ordering.

Quick fit check

Match the exact filter before buying

The official manufacturer source identifies these primary parts for the GermGuardian AC4300.

Specialty replacement filter set Filter B Cannabis Smoke FLT420B
View part details Official GermGuardian source
Replacement filter set Filter B FLT4825
View part details Official GermGuardian source
Specialty replacement filter set Filter B SMOKE CLEAR FLT4825SM
View part details Official GermGuardian source
Specialty replacement filter set Filter B TOXIN CLEAR FLT4825VO
View part details Official GermGuardian source
Specialty replacement filter set Filter B PET PURE FLT4850PT
View part details Official GermGuardian source

All compatible part numbers

Primary, optional, specialty, and alternative filters are listed separately so you can match the role as well as the part number.

Filter Part number Role Source
Filter B Cannabis Smoke FLT420B Specialty replacement filter set Guardian Technologies GermGuardian FLT420B - Filter B Cannabis Smoke
Filter B FLT4825 Replacement filter set Guardian Technologies GermGuardian FLT4825 - Filter B
Filter B SMOKE CLEAR FLT4825SM Specialty replacement filter set Guardian Technologies GermGuardian FLT4825SM - Filter B SMOKE CLEAR
Filter B TOXIN CLEAR FLT4825VO Specialty replacement filter set Guardian Technologies GermGuardian FLT4825VO - Filter B TOXIN CLEAR
Filter B PET PURE FLT4850PT Specialty replacement filter set Guardian Technologies GermGuardian FLT4850PT - Filter B PET PURE

Official compatibility record

Manufacturer evidence

Each compatibility and care statement below is reproduced from the cited official manufacturer record. Check the source again before ordering.

Filter B Cannabis Smoke FLT420B

Official Guardian Technologies product page identifies Filter B Cannabis Smoke, SKU FLT420B, as compatible with models AC4300, AC4820, AC4825, AC4850PT, AC4870, AC4880, AC4900 and CDAP4500.

Source checked
Replacement guidance
The cited page describes FLT420B as a cannabis-smoke replacement filter but does not state a replacement interval.
Guidance checked

Filter B FLT4825

Official Guardian Technologies product page identifies Filter B, SKU FLT4825, as compatible with models AC4300, AC4820, AC4825, AC4850PT, AC4870, AC4880, AC4900 and CDAP4500.

Source checked
Replacement guidance
The cited page states that FLT22CB4 carbon pre-filters can be replaced every 2 to 3 months to extend filter life; it does not state a replacement interval for FLT4825.
Guidance checked

Filter B SMOKE CLEAR FLT4825SM

Official Guardian Technologies product page identifies Filter B SMOKE CLEAR, SKU FLT4825SM, as compatible with models AC4300, AC4820, AC4825, AC4850PT, AC4870, AC4880, AC4900 and CDAP4500.

Source checked
Replacement guidance
GermGuardian recommends replacing the Smoke Clear HEPA filter set every 6 months. Carbon pre-filters (FLT22CB4) can be replaced every 2 to 3 months.
Guidance checked

Filter B TOXIN CLEAR FLT4825VO

Official Guardian Technologies product page identifies Filter B TOXIN CLEAR, SKU FLT4825VO, as compatible with models AC4300, AC4820, AC4825, AC4850PT, AC4870, AC4880, AC4900 and CDAP4500.

Source checked
Replacement guidance
GermGuardian recommends replacing the Toxin Clear HEPA filter set every 6 months. Carbon pre-filters (FLT22CB4) can be replaced every 2 to 3 months.
Guidance checked

Filter B PET PURE FLT4850PT

Official Guardian Technologies product page identifies Filter B PET PURE, SKU FLT4850PT, as compatible with models AC4300, AC4820, AC4825, AC4850PT, AC4870, AC4880, AC4900 and CDAP4500.

Source checked
Replacement guidance
GermGuardian recommends replacing the Pet Pure True HEPA filter every 6 months to maintain optimal performance. Carbon pre-filters (FLT22CB4) can be replaced every 2 to 3 months to extend filter life.
Guidance checked

Buying checklist

How to choose the right replacement

Match the GermGuardian AC4300 model label and the exact part number above. Marketplace listings can be OEM or aftermarket, and a similar-looking filter may have different dimensions.

Compare the listing title, product photos, included filter pieces, seller details, delivery estimate, and total price before you order.

Care guidance

Replacement schedule

  • Filter B Cannabis Smoke FLT420B: The cited page describes FLT420B as a cannabis-smoke replacement filter but does not state a replacement interval.
  • Filter B FLT4825: The cited page states that FLT22CB4 carbon pre-filters can be replaced every 2 to 3 months to extend filter life; it does not state a replacement interval for FLT4825.
  • Filter B SMOKE CLEAR FLT4825SM: GermGuardian recommends replacing the Smoke Clear HEPA filter set every 6 months. Carbon pre-filters (FLT22CB4) can be replaced every 2 to 3 months.
  • Filter B TOXIN CLEAR FLT4825VO: GermGuardian recommends replacing the Toxin Clear HEPA filter set every 6 months. Carbon pre-filters (FLT22CB4) can be replaced every 2 to 3 months.
  • Filter B PET PURE FLT4850PT: GermGuardian recommends replacing the Pet Pure True HEPA filter every 6 months to maintain optimal performance. Carbon pre-filters (FLT22CB4) can be replaced every 2 to 3 months to extend filter life.

Usage and air quality can affect service life. Follow the cited manufacturer guidance for each part.

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Frequently asked questions

What filter does the GermGuardian AC4300 use?

The GermGuardian AC4300 uses Filter B Cannabis Smoke (FLT420B), Filter B (FLT4825), Filter B SMOKE CLEAR (FLT4825SM), Filter B TOXIN CLEAR (FLT4825VO), Filter B PET PURE (FLT4850PT). Each part number on this page is backed by an official GermGuardian source.

How often should I replace the GermGuardian AC4300 filter?

The cited page describes FLT420B as a cannabis-smoke replacement filter but does not state a replacement interval.

Where can I check replacement filters for the GermGuardian AC4300?

This page links directly to the cited official GermGuardian product page and shows sponsored individual eBay listings when a fresh exact-part snapshot is available, with an exact-part eBay search fallback. This site does not sell filters; match the part number and review the current source or seller listing before buying.