Most efficient setting on boiler for radiator

[rockinter]

Hi,
Can you tell me what temperature on the boiler you have to set the radiator system so that it burns the gas most efficiently and uses less electricity?

Is it maximum, minimum or in the middle or is there an exact temeperature?

 

[onlyfitidealboilers]

if you have over sized radiators best running at a low setting to keep the boiler in a condensing mode.

you really need a 20 degree temp diff between the too mate

ie 60 flow 40 return

 

[mehran]

for a condensing boiler the lower the better... but this must be balanced with comfort and times you need it on.

 

[D_Hailsham]

Which make and exact model boiler do you have?

What controls do you have (programmer, thermostat etc)