In my bedroom/study I have only a radiator as heating. The problem is that the water flow is controlled by the thermostat in the living. This means that around wintertime my room has a big change in temperature. It is hard to control the heating of my room and because I use my bedroom also as a study I spend a lot of time in it. The problem is that once the temperature in the living in 20°c the thermostat stop the heating of the radiators and so it stops the heating of my room. That way sometimes my room only achieve a poor 14°C which is not comfortable to use as a study. But If I turn up the radiator in my room higher, there is a chance (it only happens a few times) that it reaches 21-22°C which is to hot for me to sleep.
I thought about a solution: if I changed the radiator (most of it is just heating air in stead of giving radiant heat) into a radiant heating system, it could solve my problem. I was thinking about a system like a 'heat wall', that's where they placed heated water lines against the wall and then place cob over it. But that system is designed for low temperature heating systems, in which the water is far less hot than it is when used for radiators. But I think that if I make like an extra cob wall of like 20 cm thick, I could store some of that hot water heat for when the thermostats stops the hot water circulation. That way the hot water used for the radiator would not result in an extreme hot wall surface, but it would result in a buffering radiant heating wall.
I was wondering if this idea can work or if there will be major issues. My idea for the moment is: replace the radiator by a water pipe network and then put cob around it. Or is there a better way to do it?