> coal plant, especially a combined district heat-power coal fire plant, has a far higher efficiency than any domestic gas/oil boiler can achieve. This is bull

> coal plant, especially a combined district heat-power coal fire plant, has a far higher efficiency than any domestic gas/oil boiler can achieve. This is bullshit. Domestic boilers have a thermal efficiency of around 93%. The most modern coal plants have electrical efficiencies around <47% on 100% and around 43% on 50% output. Combined heat-power plants have a combined efficiency of around 90%. And the centralised versions have the transport loss. Getting all the calculations right is really complicated. Edit: the annual mean of the heat pump COP is not 3-4, either.