This is as zero-emission as the grid, simply having someone else burn fossil fuels doesn't make it clean (it's probably better but still). Also gas is a lot ch

This is as zero-emission as the grid, simply having someone else burn fossil fuels doesn't make it clean (it's probably better but still). Also gas is a lot cheaper to heat with at current UK prices than electricity. One of the reasons heat pumps are used is that the increased efficiency offsets that.