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GermGuardian air purifier

GermGuardian AC9400W replacement filter

GermGuardian AC9400W uses Filter K (part FLT9400) as its primary replacement filter set.

Official GermGuardian fit · checked

All compatible GermGuardian AC9400W filters

Every part number below is a primary replacement filter for this model.

Filter Part number Type Price
Filter K FLT9400 Replacement filter set Check price

Price links open sponsored eBay searches for the exact part number.

Before you order

How to buy the right GermGuardian AC9400W filter

  • Confirm the label on your purifier reads AC9400W.
  • Make sure the listing names part FLT9400, not just a similar-looking filter.
  • Check the pack size and pieces included. Genuine and third-party filters can differ.
  • Compare the total price with shipping, plus the seller's feedback and delivery estimate.

Care guidance

Replacement schedule

  • Filter K FLT9400: The cited page describes FLT9400 as a True HEPA and treated-carbon replacement filter but does not state a replacement interval.

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

Frequently asked questions

What filter does the GermGuardian AC9400W use?

The GermGuardian AC9400W uses Filter K (FLT9400). Each part number on this page is backed by an official GermGuardian source.

How often should I replace the GermGuardian AC9400W filter?

The cited page describes FLT9400 as a True HEPA and treated-carbon replacement filter but does not state a replacement interval.

Where can I check replacement filters for the GermGuardian AC9400W?

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.

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 K FLT9400

Official Guardian Technologies product page identifies Filter K, SKU FLT9400, as compatible with model AC9400W.

Source checked
Replacement guidance
The cited page describes FLT9400 as a True HEPA and treated-carbon replacement filter but does not state a replacement interval.
Guidance checked

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