I'm not disagreeing that this is a fundamental physics issue with this type of installation and for a retrofit installation I believe that it is still the best option. I'm sure that now Honeywell have set a standard, other manufacturers must be looking at alternatives that may be better implemented but will still not get over this particular issue unless they also produce small, cheap sensors.
The point I was making was that if I were doing a new build or a whole house refurbishment, Evohome would not be my system of choice because of the limitations induced by putting a sensor next to the radiator. I haven't looked at this in detail as it is not something I am looking at doing in the near future, but if you used the Heatmiser system or something similar and a heating manifold, I believe that you would achieve a much more accurate level of control. However, it would probably be considerably more expensive.
The point I was making was that if I were doing a new build or a whole house refurbishment, Evohome would not be my system of choice because of the limitations induced by putting a sensor next to the radiator. I haven't looked at this in detail as it is not something I am looking at doing in the near future, but if you used the Heatmiser system or something similar and a heating manifold, I believe that you would achieve a much more accurate level of control. However, it would probably be considerably more expensive.
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