Your Luthmore One serial number can be found on the bottom of the boiler on the sticker or in the Luthmore App. The serial number will start with L01.
On the product:
The serial number for the boiler is located on a sticker on the underside of the wall bracket and may be viewed with a mirror.
Image: Example of the serial number sticker on the product
On the App:
If the boiler is connected, the serial number can also be found in the Luthmore App.
Navigate to Setup > Boiler Settings and scroll down to the bottom of the screen.
Image: Example of the serial number location in the Luthmore App