As I posted in another thread, I've been trying to understand the options I should be considering for space heating and DHW.  We have a few small layout changes planned along with refurb our bathroom and shower room so deciding on heating and DHW system seems like the sensible first stage. Would appreciate any input into pros / cons of the various systems I'm thinking about and also any systems that I haven't listed that I should be thinking about.      Limitations: No Gas s