Excuse the naivety but how does weather comp even save much? Surely you have a thermostat once the heating hits this or gets close it turns off. Is it just trying to stop it overshooting too much? In my last place I had gas and rads, ran 24/7 with thermostat set at a temp. Never felt over hot (due to heating, exc summer) or to cold. I'm probably perfectly demonstrating why the average man on the street won't understand it 🤣