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Specialty replacement filter set

GermGuardian Filter B Cannabis Smoke – FLT420B replacement filter

Filter B Cannabis Smoke (FLT420B) fits GermGuardian AC4300, GermGuardian AC4820, GermGuardian AC4825 and 5 more models according to the cited GermGuardian source.

Official manufacturer Filter B Cannabis Smoke FLT420B Check official GermGuardian availability Non-affiliate link to the cited official product page.
Marketplace search Check eBay prices for FLT420B Sponsored eBay links. We may earn a commission from qualifying purchases.

Quick fit check

Filter B Cannabis Smoke fit and replacement facts

Part numberFLT420B
Compatible models8
Filter roleSpecialty replacement filter set

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

Compatible GermGuardian models

Follow a model link for its complete primary, optional, specialty, and alternative filter list.

Model Filter Part number Role Source Marketplace
GermGuardian AC4300 Filter B Cannabis Smoke FLT420B Specialty replacement filter set Guardian Technologies GermGuardian FLT420B - Filter B Cannabis Smoke Check prices
GermGuardian AC4820 Filter B Cannabis Smoke FLT420B Specialty replacement filter set Guardian Technologies GermGuardian FLT420B - Filter B Cannabis Smoke Check prices
GermGuardian AC4825 Filter B Cannabis Smoke FLT420B Specialty replacement filter set Guardian Technologies GermGuardian FLT420B - Filter B Cannabis Smoke Check prices
GermGuardian AC4850PT Filter B Cannabis Smoke FLT420B Specialty replacement filter set Guardian Technologies GermGuardian FLT420B - Filter B Cannabis Smoke Check prices
GermGuardian AC4870 Filter B Cannabis Smoke FLT420B Specialty replacement filter set Guardian Technologies GermGuardian FLT420B - Filter B Cannabis Smoke Check prices
GermGuardian AC4880 Filter B Cannabis Smoke FLT420B Specialty replacement filter set Guardian Technologies GermGuardian FLT420B - Filter B Cannabis Smoke Check prices
GermGuardian AC4900 Filter B Cannabis Smoke FLT420B Specialty replacement filter set Guardian Technologies GermGuardian FLT420B - Filter B Cannabis Smoke Check prices
GermGuardian CDAP4500 Filter B Cannabis Smoke FLT420B Specialty replacement filter set Guardian Technologies GermGuardian FLT420B - Filter B Cannabis Smoke Check prices

Buying checklist

What to check in a filter listing

Confirm that the listing names part FLT420B and one of the compatible models: GermGuardian AC4300, GermGuardian AC4820, GermGuardian AC4825 and 5 more models. Similar-looking filters are not proof of fit.

Decide whether you want an OEM or aftermarket filter, then compare the included pieces, product photos, seller details, delivery estimate, and total price.

Care guidance

Replacement schedule

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

Usage conditions can affect service life. Follow the cited manufacturer guidance for this part.

Compare compatible options

These filters share at least one officially cited model within the same brand, but may serve a different primary or optional role. Check each part page before buying.

Filter B

FLT4825

Replacement filter set

Frequently asked questions

How often should I replace the GermGuardian Filter B Cannabis Smoke (FLT420B)?

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

Which GermGuardian models use the Filter B Cannabis Smoke FLT420B?

According to the official GermGuardian product page, Filter B Cannabis Smoke (FLT420B) fits GermGuardian AC4300, GermGuardian AC4820, GermGuardian AC4825 and 5 more models. Verify the model label on your unit before ordering.

Do aftermarket FLT420B filters work?

Marketplace listings may be from the manufacturer or a third party. Match the exact part number FLT420B, review the listing details, and verify the model label on your unit before buying.

Manufacturer source

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.

Guardian Technologies GermGuardian FLT420B - Filter B Cannabis Smoke

Source compatibility checked 2026-07-22. Recheck the listing and your purifier label before ordering.