I am currently looking at which heat pump to install for my 4 bed detached 1930s house (fairly well insulated following lots of work by me).  I have read with interest many of the posts on this forum, and also on the renewable heating hub forum and Heat Geek (the latter of which I recommend very highly for anybody who wants actually to understand what affects the efficiency of heating systems and why, rather than trying to sort between often conflicting opinions).  I have also read extensively e