Interesting point about on-site combustion heating. Assuming that the fossil fuel to electricity conversion is about 1/3 efficient and the heat pump CoP is 3,

Interesting point about on-site combustion heating. Assuming that the fossil fuel to electricity conversion is about 1/3 efficient and the heat pump CoP is 3, then on-site combustion heating is effectively as "efficient" as a heat pump. I guess the main point is that "fossil fuel -> electricity -> grid -> heat pump" cycle seems crazily inefficient in terms of losses, especially when heating is a large portion of electricity consumption in many households.