Ed Sirett wrote:
On Tue, 16 Aug 2005 22:03:08 +0000, Lobster wrote:

Ed Sirett wrote:

On Tue, 16 Aug 2005 18:49:25 +0000, Lobster wrote:

I'm very confused by the plethora of different W-B condensing
boilers on offer, and what the difference is between them.
Trogging through the blurb on the mfr's website is like a game of
'spot the difference' - I don't know why they can't publish a
straightforward comparison table.

The Si range are system boilers.

Erm - don't think so (see http://tinyurl.com/83uoh or
http://www.worcester-bosch.co.uk/index.php?fuseaction=product.detail&con_id=125934 )

This is seriously confusing.
I worked on a 28Si earlier this year and that was not a combi.
But a 30 Si is....

OK, enough is enough - time for a chat with W-B technical! I asked them
specifically about these ranges:

Junior:
- Aimed at contract market
- Has no temp control for HW, this is factory-set (unlike other models)
- (Same size case as Si)

Si:
- Very similar to Junior but with user-adjustable HW temp.
- Same heat exchanger
- Better HW flow rate (although I think this is proportional to the
nominal power outputs, which don't match between Si and Junior)

CDi:
- Top-end model
- Has different heat exchanger to others, with bigger surface area
- Condenses in HW mode as well as CH mode, which gives it an overall
actual efficiency rating of about 97%, compared with normal SEDBUK
ratings of about 90% for this and all the other W-Bs (SEDBUK doesn't
assess HW condensing)

So there we have it!
David