In article ,
Doctor Evil wrote:
A system boiler has:
- an integral pressure vessel
- integral pump.

Heating boilers: are basic boilers with no pump or pressure vessel, that
usually can be pressurised, by a kit or external pressure controls and
pump or can be open vented. Most buy them to be open vented.

A combi is a system boiler with and added water section.

So all combis have an integral pressure vessel and integral pump?

--
*Toilet stolen from police station. Cops have nothing to go on.

Dave Plowman London SW
To e-mail, change noise into sound.