Hi all,
moved to a terraced house recently, and changed an old Vokera boiler (15+ years) with a Vaillant 832 Ecotec Plus together with a Nest thermostat. Previous system was having only TRVs so probably highly inefficient. I am happy with both the boiler and the flexibility that Nest thermostat is giving me, given that we don't follow a specific schedule.
With the weather being cold, I was looking into boiler settings. The installer set the below:
D.000 to Auto
DHW tp 63C
CH to 75C
Rooms become warm very quickly(and radiators very hot as temp is 75C), and radiators turn cold for 2-3 hours when thermostat will make the system work again.
Are the above the most efficient for this boiler? Flow return temperature (from D.041) seems to be 66C, 9C less than CH setting, but shouldn't it be 55C for maximum efficiency?
moved to a terraced house recently, and changed an old Vokera boiler (15+ years) with a Vaillant 832 Ecotec Plus together with a Nest thermostat. Previous system was having only TRVs so probably highly inefficient. I am happy with both the boiler and the flexibility that Nest thermostat is giving me, given that we don't follow a specific schedule.
With the weather being cold, I was looking into boiler settings. The installer set the below:
D.000 to Auto
DHW tp 63C
CH to 75C
Rooms become warm very quickly(and radiators very hot as temp is 75C), and radiators turn cold for 2-3 hours when thermostat will make the system work again.
Are the above the most efficient for this boiler? Flow return temperature (from D.041) seems to be 66C, 9C less than CH setting, but shouldn't it be 55C for maximum efficiency?