I am at the point of signing up for a ASHP for my old stone built almost renovated cottage and would much appreciate finding out whether it will actually work for a house like mine. I am concerned that I might end up using more electricity££ than I save on LPG££.  I am a very low energy user, less than £400 pa on LPG and just over £200 pa on electricity. I have solar PV. It's the hot water that I am so unsure about. Space heating will work as I use a woodburner a lot.