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Replacement filter set

GermGuardian Filter A FLT4010 replacement filter

Filter A (part FLT4010) fits GermGuardian AC4010 and GermGuardian AC4020, according to the official GermGuardian product page.

Official GermGuardian fit · checked

GermGuardian models that use Filter A FLT4010

This filter is listed for 2 models. Open a model to see its complete list of primary, optional, and specialty filters.

Before you order

What to check in a FLT4010 listing

  • The listing names part FLT4010. Similar-looking filters are not proof of fit.
  • Your purifier is one of the compatible models: GermGuardian AC4010 and GermGuardian AC4020.
  • The pack size and pieces included match what you need. Genuine and third-party filters can differ.
  • The total price with shipping, seller feedback, and delivery estimate work for you.

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.

Official compatibility record

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 2026-08-29. Recheck the listing and your purifier label before ordering.