what size of central heating pump

[mrcabrach]

placeing new boiler in shed at side of house & going to pump water back to house
the highest point is 4.5 m which is about 25 - 30 m from boiler
my prefered choice of pump is grunfos
pipe size is 25mm

 

[Agile]

The boiler installer should be able to spec the pump.

It depends mostly on the heat load and to a very small extent the boiler.

A Grundfoss 15-50 suits most three bed semis.

Tony

 

[mrcabrach]

mabe should have said but the water is going to be pumped from accumulator tank which will be heated to around 85c 4 bed room bungalow with 10 rads
thanks