Like others who have the capability, I’ve been running my heating with weather compensation enabled - it’s one of the recommendations often listed for energy saving.
More recently (the last few days) I’ve switched that off and got some surprising results. I’m using less fuel and the house ‘feels’ more comfortable.
Obviously with these sort of tests, if you change more than one thing at once you’re not sure which parameter has had an effect. Luckily, my heating system also tracks outside temperature and so although I can’t adjust it, I can also monitor it.
There is an element of possible solar gain in play but again, I can take my solar PV stats to look at an approximation of that.
A few days probably isn’t enough to make a final judgement but at present I can see less energy use on a day when temperatures declined and the general comfort level was better.
A little surprising given how we are led to believe that having weather compensation enabled is better. I know there are comments about avoiding ‘thermal shock’ to the system but that’s something else I’m not convinced about .. unless manufacturers are looking to reduce the robustness of these systems