Installing a thermostatic head is a very simple operation, it does not present any difficulties and can be done by anyone, you just need to follow a few main steps (https://www.irsap.com/en/support-en/irsap-consiglia-3/2095-how-to-mount-a-thermostatic-head). An illustrative video can be viewed at https://www.youtube.com/watch?v=lpnQywYp5BU.