# 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.

- [Original product page](https://bargainpostbox.co.uk/product/philips-3400-series-ac3420-10-air-purifier-humidifier)
- [View offer](https://bargainpostbox.co.uk/visit/philips-3400-series-ac3420-10-air-purifier-humidifier)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: PHILIPS
- Model: AC3420/10
- Category: Home & Kitchen > Heating, Cooling & Air Quality > Air Purifiers
- Price: 239.00 GBP
- Previous price: 329.99 GBP
- Discount: 28%
- Price checked: 2026-11-12T18:12:34.352Z
- Rating: 4 / 5
- Reviews: 120

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## 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.

## 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.

## 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

## Before you buy

- 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.

## 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.

## Customer feedback

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.
- Positive themes: Some feedback reports improved air quality and reduced allergy symptoms.
- Mixed feedback: Connectivity receives mixed feedback.
- 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.

## Alternative options

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- [WINIX 5500-2 Air Purifier for Home Bedroom, CADR 390m³/h, 99m², Carbon & HEPA Filters Pollen Allergies Dust Smoke Odors, Air Cleaner Smart Sensor, Sleep Auto Mode](https://bargainpostbox.co.uk/visit/philips-3400-series-ac3420-10-air-purifier-humidifier)
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- [Bosch Dry 4000, Dehumidifier, For 33 m², 16L/24h \| Simple, Efficient, Ideal for Your Home & Quick Drying of Your Laundry, Whisper-quiet only 38 dBA](https://bargainpostbox.co.uk/visit/philips-3400-series-ac3420-10-air-purifier-humidifier)
- [DREO 221m³/h Quiet Smart Air Purifier for Bedroom with RGBIC Light, 530S \| 3-Stage Filtration, Real-Time Air Quality Monitor, RGBIC LEDs, Helps Reduce Dust, Smoke & Household Odors](https://bargainpostbox.co.uk/visit/philips-3400-series-ac3420-10-air-purifier-humidifier)
- [DREO Smart Air Purifier for Home & Bedroom, PM2.5 Display, 196 m³/h CADR \| 3 in 1 HEPA Filters in Sleep Mode, AHAM verified, Auto & Turbo Modes, Wi-Fi/Alexa, for Pollen, Dust, Smoke, Quiet, Black](https://bargainpostbox.co.uk/visit/dreo-dr-hap008s-smart-air-purifier)
- [Levoit Eleva 300X Air Purifier, PM1.0/2.5/10, 2-Year HEPA, Allergy Defence \| ECARF Certified, 273m³/h, 3-Stage HEPA Filtration, 99.97% Dust & Pollen Capture, Carbon Odour Filter, 19dB Sleep, AI Insight](https://bargainpostbox.co.uk/visit/philips-3400-series-ac3420-10-air-purifier-humidifier)
- [WINIX 5300-2 Air Purifier for Home Bedroom, CADR 390m³/h, 99m², Carbon & HEPA Filters Pollen Allergies Dust Smoke Odors, Air Cleaner Smart Sensor, Sleep Auto Mode](https://bargainpostbox.co.uk/visit/philips-3400-series-ac3420-10-air-purifier-humidifier)

## Add-ons

- [PUREBURG Replacement Filter Pack Compatible with Philips AC3421/13, 3400 Series Air Purification & Humidification 2-in-1 FY3400 FY3401, HEPA + Activated Carbon Humidification Filter](https://bargainpostbox.co.uk/visit/philips-3400-series-ac3420-10-air-purifier-humidifier)

## Images

![Philips 3400 Series AC3420/10 2-in-1 Air Purifier and Humidifier — 1](https://bargainpostbox.co.uk/i/dZZ5x0YaRp136n2Ya_V0evZ-0e7dYIyVJuSOdGlE1OrmPzsx77KDpE10EoxCEgPPCFIzXaUuCa2DZ2YWh22J9uFuwhEwY6TEujxX66uTRbgXGSdEGAUhaCfy.jpg)

![Philips 3400 Series AC3420/10 2-in-1 Air Purifier and Humidifier — 2](https://bargainpostbox.co.uk/i/_nJeKD1g2gUZLGROcMsxdEn01HKq4IOtoEsuqwkc42ji95PQoIG4iXzSFWIVGbiWYbpMZlvo6zArailKcWSBZncsG1SWjHdQo8NVsUJUh-M1Czn-W8jNM83x.jpg)

![Philips 3400 Series AC3420/10 2-in-1 Air Purifier and Humidifier — 3](https://bargainpostbox.co.uk/i/PSChj-ZrkwgdW9SoATuj057DrkGjcTAJDtGLLC43lp5utC37u5EVD4hrb0z4tg-Ylo5e4bxkB9E1Lk9HyaRIAUNiAT8ucqcCFzW9gW3q9Ki4s9Us4_dTig1y.jpg)

![Philips 3400 Series AC3420/10 2-in-1 Air Purifier and Humidifier — 4](https://bargainpostbox.co.uk/i/hGpzCOG1e21iAXlDv6Tc51T_U5Z4kNHQSkeseZEt9fKRTAdDeex--9pmNgiC6W2nvxOOE_x3f6dDbv41KzE4L1u2QpjzYvcxtSlIQ5BVzKmgy_e8fNSbgB9q.jpg)

![Philips 3400 Series AC3420/10 2-in-1 Air Purifier and Humidifier — 5](https://bargainpostbox.co.uk/i/EIU62wqANQWgbLGPtm2pKAAmj1Whu8fPBzrplMJ1xb6WmJjUWQ-Ld5gcVJtkAnb8C-6KUoEfuTy6ocHqs3_kdktxqqPA1wTQm2gaiNP2lxwfn-DN_cUY5mHm.jpg)

![Philips 3400 Series AC3420/10 2-in-1 Air Purifier and Humidifier — 6](https://bargainpostbox.co.uk/i/OCdL7-phFAOU1kYrtnGBTFz1ZVGFo10pUoPL1JYwRcTkxo7DX86Asjg_m6afypybI5rfnZp_B8xJ02N_zcTnYkkdZ4C0daLvW3RQ04af3NaqT8RS29WczWur.jpg)

![Philips 3400 Series AC3420/10 2-in-1 Air Purifier and Humidifier — 7](https://bargainpostbox.co.uk/i/6-dGyD9mngY50Va63u5huZ-ufSqId1r7K6FQ1kSCCIj1i5IaPzX0ad1HxyZxFDWjubWDPXsdz06w0XLuRYMKIYj0QXcTUIOpddvnGqFG-N_eNOJzsQ9j7tSZ.jpg)