Couldn't agree more. Had my boiler serviced yesterday and the chap that
did it (and installs Nest) was shocked at the inability to schedule
energy when the user wants it.
If that were the case the system should have a minimum on time of half
hour and above that allow the user whatever time span they choose, not
these nonsense half hour increments.
I have the exact same issue - I can only set it to come on the hour or
half hour. Utterly ridiculous that I have to have hot water on in half
hour increments and at times that don't necessarily suit.