How do I fit the FY3400/30?

No tools, a few minutes: 5 steps, listed on this page with the replacement video where the maker has one.

What happens if I don't change it?

A clogged filter cuts the airflow, so the unit works harder and dries or cleans the air more slowly.

Humidifier filter

Philips FY3400/30 HEPA NanoProtect Filter (PureProtect Water 3400 AC3420, AC3421)

FY3400/30

Fits 2 models · replace every 12 months

Wrong part, or your model missing? Tell us. A person checks every report.

GenuineGenuine Philips

$83.85

Amazon AU · 28 OctLowest genuine · Amazon AU · checked 28 Oct

CompatibleCompatible option

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Genuine: made by Philips. Compatible: another brand.Genuine is made by Philips. Compatible is made by another brand. Check the seller's page for the size and models it fits.

Lowest price · $83.85

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Open Amazon AU · $83.85

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Genuine Philips

1 seller

Amazon AUGenuine · checked 28 OctGenuine part · Lowest genuinechecked 28 Oct$83.85OpenGo to seller

Open cheapest seller · $83.85

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How long it lasts

Usually every 12 months (the purifier shows a red filter alert, and stops if the filter isn't changed).

After replacing: Hold the two filter-reset buttons shown in the manual for 3 seconds, or reset it in the Philips Air+ app. If you changed it early, unplug for 10 seconds, plug back in and do the reset within 15 seconds.

Not due yet?

Get a nudge when your filter is due — it's every 12 months. One email two weeks before, no newsletter. Manage or stop it anytime.

How to change the FY3400/30 filter

Watch the guide or follow the steps.

Philips Smart 2-in-1 Air Purifier and Humidifier - PureProtect Water 3400 Series · Philips Home Living (official)

1Switch the purifier off and unplug it.
2Pull the front cover off, pull the old filter out and throw it away.
3Unwrap the new FY3400 filter, push it in and refit the front cover.
4Plug in, switch on and hold the two filter-reset buttons shown in the manual for 3 seconds (or reset it in the Air+ app).
5Wash your hands after handling the old filter.

Every number this part goes byFY3400 · FY3400-30 · FY3400/30

Retail name:: FY3400
Retail name:: FY3400-30
Retail name:: FY3400/30

Sellers list any of these; they are the same part.

Will it fit your appliance?

Type your model number and we'll check it against the makers' lists.

Your appliance model

Fits these 2 Philips modelsAC3420, AC3421

Philips2 models

The purifier side's HEPA filter, changed separately from the wick.

Common questionsWhat does the FY3400/30 fit? · How often should I replace the FY3400/30? · Where can I buy the FY3400/30 in Australia?

What does the FY3400/30 fit?: The Philips FY3400/30 HEPA NanoProtect Filter (PureProtect Water 3400 AC3420, AC3421) fits the Philips AC3420 and AC3421.
How often should I replace the FY3400/30?: Every 12 months. It works less well as the filter fills up, so it's worth doing on time.
Where can I buy the FY3400/30 in Australia?: We track 1 Australian seller for the FY3400/30; the lowest listed price when we last checked was A$83.85 at Amazon AU. Prices are re-checked daily and dated on this page.
How do I fit the FY3400/30?: No tools, a few minutes: 5 steps, listed on this page with the replacement video where the maker has one.
What happens if I don't change it?: A clogged filter cuts the airflow, so the unit works harder and dries or cleans the air more slowly.
How do I reset the reminder?: Hold the two filter-reset buttons shown in the manual for 3 seconds, or reset it in the Philips Air+ app. If you changed it early, unplug for 10 seconds, plug back in and do the reset within 15 seconds.

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