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Specialty replacement filter set

GermGuardian Filter O PET PURE FLT5100PT replacement filter

Filter O PET PURE (part FLT5100PT) fits GermGuardian AC3200, GermGuardian AC3250, GermGuardian AC5109W and GermGuardian AP3250, according to the official GermGuardian product page.

Official GermGuardian fit · checked

GermGuardian models that use Filter O PET PURE FLT5100PT

This filter is listed for 4 models. Open a model to see its complete list of primary, optional, and specialty filters.

Before you order

What to check in a FLT5100PT listing

  • The listing names part FLT5100PT. Similar-looking filters are not proof of fit.
  • Your purifier is one of the compatible models: GermGuardian AC3200, GermGuardian AC3250, GermGuardian AC5109W and GermGuardian AP3250.
  • 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 Pet Pure HEPA filter set every 6 months. Carbon filters (FLT28CB4) can be replaced every 2 to 3 months.

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

Compare compatible options

These share at least one compatible model but may do a different job, such as a carbon pre-filter or a specialty version. Check each part page before buying.

Replacement filter set

Filter O

FLT5100

Frequently asked questions

How often should I replace the GermGuardian Filter O PET PURE (FLT5100PT)?

GermGuardian recommends replacing the Pet Pure HEPA filter set every 6 months. Carbon filters (FLT28CB4) can be replaced every 2 to 3 months.

Which GermGuardian models use the Filter O PET PURE FLT5100PT?

According to the official GermGuardian product page, Filter O PET PURE (FLT5100PT) fits GermGuardian AC3200, GermGuardian AC3250, GermGuardian AC5109W and GermGuardian AP3250. Verify the model label on your unit before ordering.

Do aftermarket FLT5100PT filters work?

Marketplace listings may be from the manufacturer or a third party. Match the exact part number FLT5100PT, 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 O PET PURE, SKU FLT5100PT, as compatible with models AC3200, AC3250, AC5109W and AP3250.

Guardian Technologies GermGuardian FLT5100PT - Filter O PET PURE

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