In article ,
Fredxx wrote:
A simple system boiler has a variable speed fan and a modulating gas
valve. No other moving parts.

Pump?

External to the boiler.

Which make of system boiler doesn't include a pump?

Would seem silly to me, since the idea of a system boiler is pretty well
everything in the one unit?

--
*Do infants enjoy infancy as much as adults enjoy adultery?

Dave Plowman London SW
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