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Replacement filter set

GermGuardian Filter A – FLT4010 replacement filter

Filter A (FLT4010) fits GermGuardian AC4010 and GermGuardian AC4020 according to the cited GermGuardian source.

Official manufacturer Filter A FLT4010 Check official GermGuardian availability Non-affiliate link to the cited official product page.
Marketplace search Check eBay prices for FLT4010 Sponsored eBay links. We may earn a commission from qualifying purchases.

Quick fit check

Filter A fit and replacement facts

Part numberFLT4010
Compatible models2
Filter roleReplacement filter set

GermGuardian recommends replacing the combination True HEPA and activated carbon filter set every 6 to 8 months.

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 AC4010 Filter A FLT4010 Replacement filter set Guardian Technologies GermGuardian FLT4010 - Filter A Check prices
GermGuardian AC4020 Filter A FLT4010 Replacement filter set Guardian Technologies GermGuardian FLT4010 - Filter A Check prices

Buying checklist

What to check in a filter listing

Confirm that the listing names part FLT4010 and one of the compatible models: GermGuardian AC4010 and GermGuardian AC4020. 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

GermGuardian recommends replacing the combination True HEPA and activated carbon filter set every 6 to 8 months.

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

Frequently asked questions

How often should I replace the GermGuardian Filter A (FLT4010)?

GermGuardian recommends replacing the combination True HEPA and activated carbon filter set every 6 to 8 months.

Which GermGuardian models use the Filter A FLT4010?

According to the official GermGuardian product page, Filter A (FLT4010) fits GermGuardian AC4010 and GermGuardian AC4020. Verify the model label on your unit before ordering.

Do aftermarket FLT4010 filters work?

Marketplace listings may be from the manufacturer or a third party. Match the exact part number FLT4010, review the listing details, and verify the model label on your unit before buying.

Manufacturer source

Official Guardian Technologies product page identifies Filter A, SKU FLT4010, as compatible with models AC4010 and AC4020.

Guardian Technologies GermGuardian FLT4010 - Filter A

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