Boiler overheating?

[Deleted member 105431]

So basically I should be setting the flow temperature as low as possible.

I have loft insulation and double glazing and draft proofing.

When the return temp of the boiler exceeds 55 deg c efficency starts to fall as it will stop condensing. Try the flow temp on 60/65.

 

[David937]

I will probably use 60 degrees in mild weather like it is now a and 65 degrees when a bit colder and 75 degrees when very cold.

 

[Deleted member 105431]

I will probably use 60 degrees in mild weather like it is now a and 65 degrees when a bit colder and 75 degrees when very cold.

yes I agree but if you get weather compensation (a vaillant 430) then this will alter flow temp automatically for you according to the outside temp.

 

[David937]

I would get the VRC430, if I did the zoning system would not work, if you remember my previous post.

//www.diynot.com/forums/viewtopic.php?p=1023252#1023252