And I thought the CM900 series was too complicated for the average female to fiddle with!It is rare for me to come home from school to find that the heating is still off and hasn't been tampered with, last month only once out of 31 days did the heating stay on Automatic.
I don't see the point in lowering the temp to 16C if someone is home all day.My Mum is at home during the day and she usually opens the windows at 1000 to ventilate the house and then switches the heating back on at 1200 @ 19.5C as usual.On very cold days she won't open windows and she will normally put the heating on at 1000.
If she has to go out she will lower the temp to 18C.
You should have set the programmer to get the house up to temperature when you arrived home!It so happen that one cold weekend we were out so the heating was left at 16C, we got back just before 1800 and the temperature had dropped to 17.0C which was comfortable for me but not anyone else.
When you say that the CM900 is rarely left on Auto, do you mean that the slider switch has been moved to Manual or just that the temp has been changed using the two buttons? I would use all six daily settings, e.g. with one set for about mid-day and the other in the middle of the afternoon. Also, show your family how to put the temperature up/down by using the buttons. This way, if they drop/raise the temperature, it will automatically revert to your setting at the next time check.
You will use less gas if you try to keep the temperature constant during the day.
So heat from down stairs will rise and keep the attic warm during the day. Synchronise times and temperatures during the day. It does not matter if the attic is warmer at night.The attic has no door.
No. If you do that, you will just reduce the radiator output even further. I think you are trying to do the boiler's job rather than letting it adjust temperature according to requirements; i.e high when the house is cold and lowering as the house warms up. I know there is a problem because your boiler is considerably oversized for the heating load - but that's the result of choosing a combi just for hot water requirements.The house usually gets to temperature quite quickly, do you think it would be more efficient setting the flow temperature even lower and waiting a little longer for the house to warm up?