site and or remote technical support from installer manufacture oem or the like this either by the user forwarding the content of the qr code 26 in an email as a link as printed paper or share it on other media or by the support personal reads the qr code 26 on site the content of the qr code 26 may be programmable control unit data such as control unit settings used by the user to see whether the settings supports the comfort the user want as well as for sharing the control unit settings with other users e g friends and family the content of the qr code 26 may be historical control unit data used for a usage report this in order to inform the user of the energy usage of the floor heating zone 2 controlled by the control unit 10 and giving advice on optimisation the optimisation may include suggestion for control unit settings of one or more of the schedule comfort program schedule energy saving program and or any other program in the control unit 10 the relevant control unit setting might in particular include preheating pre cooling open window detection and night time reduction thereby instructing the user in how energy can be saved the website 33 may enable the user to compare control unit data from the control unit 10 with regional data the regional data may be supplied to the website 33 from a server having a database containing said regional data the content of the qr code 26 may be operational control unit data used for configuring the.