All that aside its really s***te putting a boiler/combi in the loft due to access awkwarness and as a user when it "locks out " at some point because they all do you will have to access it to reset it and when it doesnt reset etal you will be cursing it saying things like " why the **** did i have that b*****d boiler installed up there"
Or maybe i am being a tad cynical
Totaly agree, and the hot water run is generally excessive.