Philips Dual Scan Series 4000i AC3858/51

Removes 99.97% of particles

The Philips Series 4000i purifier effectively removes 99.97% of all harmful airborne particles as small as 0.003µm* (800× smaller than PM2.5 particles), including PM2.5 particles, pollen, dust and pet dander. It ensures that you breathe truly healthy and clean air all year round, even during the smog season. This is thanks to its three-layer filtration, which consists of a pre-filter, an activated carbon filter and a NanoProtect HEPA filter.

For rooms up to 73m²

The Philips Series 4000i purifier cleans up to 610m³ of air per hour, allowing it to purify the air in a room within 5 minutes***. You will have purified, allergen-free air in literally every corner of the room. The Philips Dual Scan Series 4000i AC3858/51 is suitable for spaces up to 73m².

Clear display on the Philips Air Purifier

Thanks to the clear display, you will always have up-to-date information on the air quality in the room. For a quick check, there is a colour-coded air quality display – blue means high air quality, while red indicates heavily polluted air. More detailed information on the amount of individual pollutants can be obtained from the numerical data on the display.

Smart filter status indicator

There's no need to worry about tracking when to replace the filters. The Philips Dual Scan Series 4000i AC3858/51 air purifier does it all for you. Based on the actual amount of pollutants filtered and the total operating time, it calculates when it's time to replace them and alerts you.

Genuine accessories

Keep the air consistently clean and get the best performance from your purifier. Ensure maximum lifetime and optimal air purification by using genuine Philips filters, which also extends the filter replacement frequency.

Extra quiet operation

The Philips Dual Scan Series 4000i air purifier is also suitable for use in the bedroom or a child's room. In sleep mode, it cleans the air very quietly, its lights are dimmed and can be turned off completely for your maximum comfort.

Allergy sleep mode

The standard sleep mode is also enhanced with a special allergy sleep mode. While maintaining a low noise level, the Philips Dual Scan Series 4000i AC3858/51 air purifier can provide up to 40% more clean air**** thanks to its effective detection of allergenic dust.

Track and control with the app

With the Clean Home+ app, you have constant control over your home's air quality anytime, anywhere. Through the app, you can control the fan speed, check the filter status, or compare the indoor air quality with the outdoor air quality. The app is compatible with Android and iOS and provides you with up-to-date data on the amount of pollutants captured, so you will always have an overview of the air quality in the room.

Removes 99.9% of viruses

According to independent studies, the Philips Dual Scan Series 4000i AC3858/51 air purifier can also capture aerosols that may contain respiratory viruses. The purifier has been tested by Airmid to remove up to 99.9% of viruses and aerosols from the air*****, and it has also been tested on coronavirus******.