I can share my temperature logging results, if you want.
This is my living room when using a simple cheap old Honeywell Round on/off thermostat. It uses TPI (10 minutes interval), but has no learning capabilities. It maintains a very constant temperature however. The radiator is constantly warm to the touch. It's doing a good job:
And this is my living room when using Evohome. The temperature is going up and down. The radiator is very hot for 1.5 hours and then becomes very cold for over 2 hours, etc, etc. Every time the room cools down, and the radiator becomes cold, it becomes very chilly and uncomfortable:
What might be important, like you, I was only heating 1 zone during these tests and it happened when using Evohome in single zone modus as well (no HR92's. Just Evotouch + BDR91).
And my gas meter logger was showing pretty much the same picture by the way (the simple round thermostat uses a moderate constant amount of gas/hour, Evohome is using a high amount for 1.5 hours, then no gas for the next 2 hours, etc.). The end result for an entire day of gas usage was about the same.
This is my living room when using a simple cheap old Honeywell Round on/off thermostat. It uses TPI (10 minutes interval), but has no learning capabilities. It maintains a very constant temperature however. The radiator is constantly warm to the touch. It's doing a good job:
And this is my living room when using Evohome. The temperature is going up and down. The radiator is very hot for 1.5 hours and then becomes very cold for over 2 hours, etc, etc. Every time the room cools down, and the radiator becomes cold, it becomes very chilly and uncomfortable:
What might be important, like you, I was only heating 1 zone during these tests and it happened when using Evohome in single zone modus as well (no HR92's. Just Evotouch + BDR91).
And my gas meter logger was showing pretty much the same picture by the way (the simple round thermostat uses a moderate constant amount of gas/hour, Evohome is using a high amount for 1.5 hours, then no gas for the next 2 hours, etc.). The end result for an entire day of gas usage was about the same.
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