
Originally Posted by
ally153
Full load scaling is taking account of the outside temperature to provide more or less demand to the boiler to compensate for the heat loss of the building. It should provide more even heating between a cold morning going into a hot afternoon. In a well insulated building heat loss isn't a factor and trying to compensate for it can provide the opposite effect. Although initially both appear to behave quite differently, and partial will appear to provide less scaling than normal, I'd expect both to learn their new normal and adapt the boiler demand fairly similarly. If only a single zone is asking for heat, there won't be much in it, but if more of the house needs heat, there will be more of an impact on the total demand.