If electricity is made combusting fossil fuels at a power plant at say 40-50% effciency thats the problem. If your using fossil fuels for heat its more efficie

If electricity is made combusting fossil fuels at a power plant at say 40-50% effciency thats the problem. If your using fossil fuels for heat its more efficient to burn them directly at point needed and capture the heat, rather than use the heat to convert to mechanical then electrical then back into heat. Air source heat pumps are basically solar assisted, they move heat from outside air into heated space using electricity which also contributes resistive heat in compressor friction. The outside air is heated by the sun.