Just had a new boiler installed and looking for some efficiency advice, please. We have always set the Heating to run from 6:30 until 21:00 via the programmer and have regulated it from the thermostat. We have used the same setting for the Hot Water. We have a conventional system with our boiler in the kitchen and the Header Tank in a cupboard a floor up in a shower room. Normally, we have the Heating turned off via the programmer in the summer months but keep the Hot Water programme on from 6:30 until 21:00. Now that the cost of gas has ballooned plus the obvious effect of global warming I'm looking to be a bit more efficient. On the other hand, my wife and I are getting old and want to keep warm! I've now programmed the Heating to be on from 6:30 to 7:30, 13:00 to 14:00 and 16:00 to 22:00 on weekdays with the first setting changed to 7:30 to 8:30 at weekends. My son also lives at home and is working from home. He and my wife both normally shower early in the morning whereas I shower later in the day. I have set the Hot Water programme to 6:30 to 7:30, 12:00 to 13:00 and 17:00 to 18:00 on weekdays but, again, the first setting changed to 7:30 to 8:30 at weekends. However, when it gets really cold, I will be changing the Heating programme to "Once" so that it will be on for most of the day but governed by our thermostat temperature setting. Do these setting seem reasonable? Also, do I save any gas by reducing the time the Hot Water is on or is the heat produced from the boiler merely being diverted to the radiators instead of split between the radiators and the hot water tank?