Philips 3400 Series AC3420/10 2-in-1 Air Purifier and Humidifier

Purifier Humidifier: The Philips 3400 Series AC3420/10 combines air purification and humidification in one corded appliance. Its listed room coverage is 78 m², with app control and a sleep mode claim of 16.5 dB. It may suit rooms where dry air and airborne particles are both concerns, though its stated coverage and filtration figures are manufacturer claims.

At a glance

Combines air cleaning with humidification, with automatic humidity adjustment described by the listing.
The listing claims 78 m² coverage and a CADR of 300 m³/h.
Sleep mode is claimed to operate at 16.5 dB, with the display dimmed.
A filter-life indicator is described, and compatible filter models are listed as FY3400 and FY3401.

Price

£239.00Save 28%

Reference price: ~~£329.99~~

Price checked: 12 Nov 2026

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Often bought together

PUREBURG Replacement Filter Pack Compatible with Philips AC3421/13, 3400 Series Air Purification & Humidification 2-in-1 FY3400 FY3401, HEPA + Activated Carbon Humidification Filter

£43.06

Pros and cons

Pros

Combines purification and humidification in one appliance, useful when a room needs both functions.
App control and automatic humidity adjustment are listed, alongside a sleep mode with a dimmed display.
The listing states a maximum draw of 43 watts and claims filter life of up to one year.

Technical specifications

18 specifications

Identity
Brand	PHILIPS
Model	AC3420/10
Colour	White
Manufacture year	2024

Purification and humidification
Filter type	HEPA
Filter classes	HEPA, Active Carbon
Particle retention size	0.3 Micron
Filtration targets listed	Dust, Odors, Pet Dander, Pollen
Floor area	78.0
CADR	300 m³/h
Humidification rate	650ml/h

Controls and operation
Control method listed	App
Special features	Digital Display, Quiet
Sleep-mode noise claim	16.5 Decibels
Maximum wattage	43 watts

Power and dimensions
Power configuration	Corded Electric
Dimensions listed	28.5D x 28.5W x 52H centimetres
Weight listed	6.5 Kilograms

What to know before buying

Listing details to confirm

Specifications mix a floor-area entry of 78.0 with a claim of 78 m², and list particle retention at 0.3 Micron while feature copy claims capture down to 0.003 microns. The listing also uses differing filtration and allergen-removal percentages. Confirm the performance figures and test conditions before relying on a particular room-coverage or particle-capture claim. The 16.5 dB figure is specified for sleep mode, not all operation.

Who is it for?

A good fit for

Households wanting one appliance for both air purification and humidification.
Buyers seeking a corded unit with app control for a room within the stated coverage claim.
Those prioritising a dimmed-display sleep mode and a listed filter-life alert.

Less suited to

Buyers who need battery-powered portability.
Those who require a verified filtration or coverage result rather than manufacturer-listed claims.

Philips 3400 Series AC3420/10 2-in-1 Air Purifier and Humidifier · photo 2 — Additional product photo 2

Customer reviews on Amazon

4 / 5 · 120 ratings

5 stars53%53%
4 stars24%24%
3 stars9%9%
2 stars3%3%
1 star11%11%

Customer feedback highlights reported effectiveness, quieter operation and improved air quality, including a report of reduced allergy symptoms. Connectivity feedback is mixed, and effectiveness also receives mixed mentions. For buyers, the reported quietness and usefulness with dryness and dust may matter for bedroom or heating-season use, while app control should not be assumed to work equally well for everyone. These impressions do not verify the product’s listed coverage or filtration figures.

Positive themes

Customer feedback describes the purifier as performing well and operating quietly.
Some feedback reports improved air quality and reduced allergy symptoms.

Mixed feedback

Connectivity receives mixed feedback.
Effectiveness also receives mixed mentions.

Frequently asked questions

Does the AC3420/10 purify and humidify at the same time?

Yes. The listing describes a 2-in-1 device that can purify and humidify concurrently.

What room size does the listing specify?

It gives coverage as 78.0 in the technical details and 78 m² in product copy. Treat this as a listing claim and confirm the applicable coverage conditions.

Is the 16.5 dB noise figure for every setting?

No. The listing assigns 16.5 dB to sleep mode, so it should not be treated as a figure for every operating mode.

Which replacement filter models are named?

The listing names FY3400 and FY3401 as compatible filters and claims original filters last up to one year.