To control IRSAP NOW devices with Google Home, you must add the IRSAP NOW App to Google Home by selecting "Home Control" from the menu.
After selecting the "Devices" tab, press the button with the plus "+" in the lower right corner. Select IRSAP NOW from the proposed services. Log in with your IRSAP NOW account credentials and accept the terms of use when prompted.
Once your IRSAP NOW account has been successfully linked to Google Home, you'll be able to see the list of all heating zones between devices in the "Home Control" section. To make it easier to use, even in combination with other smart devices, you can organize them into rooms.