you're replacing an exsisting tank so just do it. No plumber involvement either, it's just a couple of fittings, plus a plastic tank aint heavy. And whatever you do, don't involve OFTEC...
ignoring defrosts, with good control and a big coil (or PHE) the heat pump can act almost like a combi. But again, gotta define your flow requirements first...
I like the first one best, just shift the wall slightly to shrink the utility. And do something with the back hall- does it really not have an internal door?
Inlaw's bungalow is very similar to this. Loft is floored and the stair opening trimmed out and just PB'd over
no, not at all.
NI's water infrastructure might be crumbling, but us private plant owners get a free on-demand pumpout.
https://www.niwater.com/need-our-help/arrange-septic-tank-emptying