Hi. I have decided against buying a combi boiler. But what is the difference 
between a system boiler and a primary boiler?
Thanks.

In an earlier contribution to this discussion,
Paul   wrote:


> Hi. I have decided against buying a combi boiler. But what is the
> difference between a system boiler and a primary boiler?
> Thanks.


A system boiler usually has additional components - typically pump,
expansion vessel, filling loop, etc. - ready installed inside its casing. A
non-system boiler doesn't - and these components have to be supplied and
installed externally. [I assume 'primary' refers to an ordinary, non-system
boiler - but am not too familiar with the term].

A system boiler requires less effort to install - but the integrated
components are often proprietary, and more expensive to replace than the
generic components used in a conventional setup.
-- 
Cheers,
Set Square
______
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"Set Square"  wrote in message 
news:3np7o3F2n7erU1@individual.net...

> In an earlier contribution to this discussion,
> Paul   wrote:
>
>> Hi. I have decided against buying a combi boiler. But what is the
>> difference between a system boiler and a primary boiler?
>> Thanks.
>
> A system boiler usually has additional components - typically pump,
> expansion vessel, filling loop, etc. - ready installed inside its casing. 
> A
> non-system boiler doesn't - and these components have to be supplied and
> installed externally. [I assume 'primary' refers to an ordinary, 
> non-system
> boiler - but am not too familiar with the term].
>
> A system boiler requires less effort to install - but the integrated
> components are often proprietary, and more expensive to replace than the
> generic components used in a conventional setup.
> -- 
> Cheers,
> Set Square
> ______
> Please reply to newsgroup. Reply address is invalid.
>
>Just what I needed to know. I was looking at the two different types at 
>http://www.ravenheat.co.uk/products.htm Thanks. Paul.