Yes, it fits, it says so in the description: "The Philips Avent replacement filter mat is a replacement filter for various Philips humidifiers. It is suitable for the humidifiers HU4801, HU4803, HU4811, HU4813, HU4814 and HU4816 from Philips. "

I have the HU4813 model, replaces the original white filter, but lasts 6 months instead of 3.

Hope this helps ...