Original humidifier filter for the pureprotect 3400 model

The original Philips humidification filter fits perfectly with the device, so it continuously provides excellent performance. Using NanoCloud technology, it emits nano-sized, clean water vapor molecules and humidifies the air with up to 99.9% fewer bacteria emissions.

Compatible with PureProtect Water 3400 Series products

Replacement Humidifier Filters 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.

Up to 6 months of use

The humidification filter provides uniform protection and optimal filtration for up to 6 months.

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.

Hygienic humidification with NanoCloud technology

NanoCloud's ultrafine spray is invisible to the eye.

Humidifies the air and emits up to 99.9% less bacteria than common ultrasonic humidifiers. Safe to use with tap water.

Connecting with the Air+ app for even greater convenience

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