What size back box should be used for Mounting a 3iE/4iE thermostat ?

Further Questions?

Programming
- How do I add a period on the Warmup 4iE Smart WiFi Thermostat?
- How do I set a programme on the Warmup 4iE Smart WiFi Thermostat?
- How do I delete a period on the Warmup 4iE Smart WiFi Thermostat?
- How do I change the background theme to clock on the Warmup 4iE® Smart WiFi Thermostat?
- How do I change a period on the Warmup 4iE Smart WiFi Thermostat?
- How do I cancel an override on the Warmup 4iE Smart WiFi Thermostat?
- Why can’t I program my 4iE to read air temperature?
- How do I connect the 4iE® to your WiFi?
- Where do I find my 4iE’s Device Number?
- When Should I Select? Air vs. Floor when Programming my thermostat?
- How can I change from Celsius to Fahrenheit on my thermostat?
App / Portal 
- How do I add Traffic alerts to my 4ie?
- How do I add or change the energy costs on the 4iE?
- Does the Myheating App have Data Protection?
- How Do I Enable to SmartGeo on the MyHeating App?
- How do you add a Room using the MyHeating App
- How do I upload my own background to my 4iE?
Troubleshooting
- The 4iE wont let me set above a certain temperature ?
- Why is my 4iE coming on during off times?
- Why is my 4iE Screen blank ?
- The air temperature on my 4iE is not right
- 4iE cannot find my SSID WiFi name
- Does the 4iE have a battery backup?
- Why won’t my background picture upload on my 4iE?
- Why does my 4iE thermostat read a percentage?
- Why is my 4iE connected to Internet But Showing an ‘!’ on the Screen?
- Why Won’t My 4iE Connect to the Internet?
- What does it mean if my 3iE thermostat reads “overload” on this display?
- What does “ER1” on the thermostat display mean?
- My thermostat reads error message “ER2” on the display?
- What if my Warmup thermostat screen is black and won’t turn on?
- Why is my floor not heating but there are no error messages?
- My thermostat says system is on but the floor is not heating up?
- When my screen goes dark, will my floor continue to heat?
- My 3iE/4iE thermostat reads “ER1 Out” on the display?
Connecting to Other Services
- Can the 4iE be used with Alexa?
- What Home Automation Systems are the 4iE Compatible with?
Wiring
- What size back box should be used for Mounting a 3iE/4iE thermostat ?
- Where do I connect the earth from the underfloor heating ?