Each room heat stats

Sands
✭
I live in an old cottage and have valves in every radiator + thermostat in lounge with tree radiator in it.
It would be great to know the leanth of time the radiator had to call for heat while it was on
Then I would know which room issuing the most fuel the most to heat.
It would be great to know the leanth of time the radiator had to call for heat while it was on
Then I would know which room issuing the most fuel the most to heat.
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