I don't know, but it sounds quiet. Similar to the other Nespresso machines. High-quality machine! We are very happy with it (private household).

The "ZN100 (NESPRESSO Original)" machine is compatible with the OriginalLine capsules from Nespresso and many other compatible capsules from third-party suppliers, but not with the standard, commercially available coffee PODs. It can only use capsules that have been specially developed for the Nespresso Original system.

We ordered it here and as soon as we received it, it didn't work. These machines do not come from Switzerland and Nespresso Switzerland cannot do anything for you.