Compatible with PureProtect Water 3400 Series products
Replacement filter for Philips PureProtect 3400 Series air purifiers, 2-in-1 air purifiers and humidifiers: AC3420, AC3421. The model number of the air purifier is located on the bottom of the device.

Long service life, a filter that can be used for up to 1 year

The filters are able to provide optimal filtration performance for up to 1 year (2), so they require less effort and financial investment. Vacuum the pre-filter regularly to increase filtration.

Original Philips filter for best performance

The original Philips filter is designed to fit the device perfectly. Always use an original Philips filter for optimal performance.

3-layer HEPA filtration traps 99.97% of the smallest particles
3-layer filtration with HEPA NanoProtect filter, activated carbon filter and pre-filter captures 99.97% of particles as small as 0.003 microns (1) – protecting against pollutants, viruses, allergens, bacteria and odors opposite.

Follow the smart filter status indicator on your device

The Philips device indicates with a light on the display when the filter needs to be replaced. This operation can be easily done in a minute.

Connecting with the Air+ app for even greater convenience

Connect your device to the Air+ app to track filter status and easily order a replacement filter if needed.

Other features:

- HEPA NanoProtect filter: 1 filter
- Activated carbon: Yes
- HEPA filter: Yes
- Size including packaging (L x W x H): 15.3*24.5*24.5 mm
- Weight, including packaging: 0.8 kg
- Replacement for Philips 2 in 1 air purifiers: AC3420, AC3421
- Particle filtration: 99.97% for 0.003 microns