Originally Posted by IAN

What is the size of your boiler ?
You have a high head pump already but it is of no use if the boiler is not
big enough or the pipework from the boiler to the heating system equally not
big enough ( unfortunately we are now into the realms of correctly sizing a
heating system )

"MattH" wrote in message
...

Can someone please help with some advice. I have recently moved into a
much larger house and have found that the central heating does not warm
all the radiators very well. I have tried balancing but although
improved the rads are nowhere near the heat at my last house. The pump
used is a Grundfos 15/60, my question is the house has 23 radiators,
approx 18 are large doubles, should i be looking for a replacement pump
and if so how can i calculate the size i need, from waht i understand
the pump i have is quite a powerful domestice version but i cany help
feeling its not pwerful enough as its the same as in my last house
which was quite smaller.

any help anyone can give greatly appreciated.

Regards


--
MattH