Maybe I'm misunderstanding, but how are you running a bath and a shower, or 3 showers, or 2 showers and some washing up, simultaneously off a combi? It may not be something you will do with your family situation but is what most people would expect from a large 5 bed house. The heat loss from a modern cylinder is negligible and it's designed to do exactly that.
Fortunately your average surveyor wouldn't even comment on a 28kw combi feeding a 5 bathroom house so you'll have no worries when selling so just do what works for you.
Fortunately your average surveyor wouldn't even comment on a 28kw combi feeding a 5 bathroom house so you'll have no worries when selling so just do what works for you.
