Ad hom attacks. Means he has lost it. I am being serious, you don't have much of a clue. One thing is for certain, your silly cylinder cannot provide two mini-drencher showers one after the other.hardwork thinks he knows what it costs to keep a modern insulated cylinder warm.
Strange that he won't quantify it.
If I heat mine on a Friday and go away for the weekend, it is still hot for a bath on Monday.
Hardwork thinks it takes "an eternity" for a modern boiler to heat a modern cylinder. This tells me that his beliefs are based on prejudice and ignorance.