It's extremely frustrating. I found MEP associates helpful - 01892 6699 78 they give consumers advice but without surveying they can't really comment.
Different plumbers have varying experiences and will tend to advise on what they are familiar with.
I am going towards the Thermal but one...
I am keen to make a decision and not sure which is the best option to go for either ;
an unvented Santon Premier plus system (120 litres) or an open vented cube thermal store.. (bespoke 155 litres)
The flat is 2 bedroom in a communal block on the third floor, mains water pipe 15mm... Will...