I have a large c/h system with 24 rads of varying sizes and with varying types (some cast iron, some pressed steel, some new towel rads).
The 3 rads in the loft coversion are cold for at least 3 hours before only 1 of them gets warm. I have done the basics like bleeding and balancing, but still now joy.
To compound matters, the h/w does not heat up if the c/h is on.
System basics are Potterton boiler (40Kw apparently), Grundfos 15-60 pump.
Is a 2 pump system an option or should the existing pump cope?
The 3 rads in the loft coversion are cold for at least 3 hours before only 1 of them gets warm. I have done the basics like bleeding and balancing, but still now joy.
To compound matters, the h/w does not heat up if the c/h is on.
System basics are Potterton boiler (40Kw apparently), Grundfos 15-60 pump.
Is a 2 pump system an option or should the existing pump cope?