In an earlier contribution to this discussion,
Guy King wrote:

The message . uk
from Ed Sirett contains these words:

Allow 10 litres per rad + say 10 litres for a modern boiler.

A 12 litre standard expansion vessel will do 10 rads.


Eh? 10 litres per rad and 10 for the boiler is 110 litres, for a 10
rad system, surely?


The *water* volume is about 110 litres. The capacity of the *expansion
vessel* needs to be about 10% of this - which is 11 litres - so 12 is ok.
What's your problem?
--
Cheers,
Roger
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