jim8flog
Journeyman Pro
People seem to be labouring under the impression that once you heat the water in a tank it needs to be used straight away before it gets cold.
Not true. As I said before, modern tanks are so well insulated that losses are minimal. In the year we've been in the house with a combi boiler, we haven't noticed a reduction in gas usage compared to the previous house that had a standard condensing boiler.
Jim makes a good point about being able to reduce the temperature of the water. Hadn't thought of that one.
As said in a similar thread one of the problems with storage tanks and water temperatures is that every time you use some it is being replaced with cold water which cools it down. However because it starts off at 70 degrees you may well not notice the difference as most times the water is used you will be cooling it down with cold water, such as when taking a bath.