Virtual Thermostat for radiator using Multi Sensor & Fibaro relay (help a newbie!)

I wrote a custom smartapp to do this with my conservatory electric underfloor heater.
The only extra bit I added is an optional contact so if the windows get opened the heating turns off
I live in the UK too so settings are in centigrade
You are welcome to try it if you wish.

https://github.com/CobraVmax/SmartThings/blob/master/smartapps/cobra/temperature-controlled-switch.src

And this should help you to install it

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