Just noticed your post - you may be able to answer my question which is what temperature should the boiler (flow) be set at in this really cold weather? We've got the room temperature set at 21degrees but its taking hours to get to that and struggles around 18.5 for the first few hours when we...
I have recently moved into a house with the above. Its been great up until this VERY cold snap. Now I find the desired temperature of 70C is taking all day to be achieved. What should the boiler temperature (system) be set at please?