The amount of complaints I have in regards to someone opening a kitchen tap while someone’s in the shower is unreal ripped a few combis out due to this
And how millsy as the cost is nearly the same eg Combi Boiler vs a heat only and unvented/ thermal store under £ 200 difference
So i guess there labour prices were high
Depends on what your fitting
300l megaflo well over a grand. So mega flo and system boiler £2k easy.