"Andy Hall" wrote in message
...
On Thu, 2 Sep 2004 23:01:54 +0100, "IMM" wrote:


"Andy Hall" wrote in message
.. .
On Thu, 2 Sep 2004 22:40:21 +0100, "IMM" wrote:

Now leet me see.... Hmmm......

Looking at the technical specification of the Worcester Greenstar,
it
says that the output to central heating is from 7.4 to 28.8kW.
This sounds awfully like modulating to me......

Who was it that you were saying wasn't reading and paying attention?

W-B tech people say the "heating" boiler can deliver a constant temp.
I
know
I have recently put one in and used a late heat exchanger on the red
return
to lower the return temp. It works wonderfully.

The ideal heating boiler has some of the flow/ret sensors taken off.

I am sure it *can*, but why screw up a perfectly good and efficient
modulating boiler and wreck its efficiency?

The makers do not seem to think it is inefficient at all.

Wowee. Well they're not going to say "By the way, John, this is not
the most efficient way to run a condensing boiler", are they?

You are confused in many respects. Very confused. All of a sudden he is a
boiler designer.

After all, they still sell conventional
boilers and are quite pleased
with themselves about that.

The fact is that more efficient operation
by far happens at lower F&R
temperatures.

And that can be achieved by various methods.

Where did you install this claimed boiler?

Relatives house, keeping the old boiler as a backup in case the B-W
fails.

A win,win situation, I'm sure.

Must be.