Am I correct in believing that if an existing boiler is to be replaced I
must install a condensing boiler and the domestic hot water, currently
gravity fed into a copper cylinder, must be pumped?

--
F

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"F" wrote in message
...
Am I correct in believing that if an existing boiler is to be replaced I
must install a condensing boiler and the domestic hot water, currently
gravity fed into a copper cylinder, must be pumped?

--
F

(Beware of spam trap - remove the negative)

Since April Fools day this year...yes. I don't think it's the mother of all
April Fool's jokes either.

Unless you've got a very special reason to be exempted.

In article , F wrote:
Am I correct in believing that if an existing boiler is to be replaced I
must install a condensing boiler and the domestic hot water, currently
gravity fed into a copper cylinder, must be pumped?

Generally yes, but there are exceptions. Check out the assessment procedure
document, link from

http://www.odpm.gov.uk/stellent/grou...ge/br0052.hcsp

--
Tony Bryer SDA UK 'Software to build on' http://www.sda.co.uk
Free SEDBUK boiler database browser http://www.sda.co.uk/qsedbuk.htm
[Latest version QSEDBUK 1.10 released 4 April 2005]

On Sun, 10 Jul 2005 18:52:39 +0100, F wrote:

Am I correct in believing that if an existing boiler is to be replaced I
must install a condensing boiler and the domestic hot water, currently
gravity fed into a copper cylinder, must be pumped?


By the book yes.

However: There still seem to be plenty of people around who will supply
and fit a non-condensing unit. Very little paperwork of course and the
warranty (probably) won't exist if you need it.
The plumbing shop at the end of the road here is selling
(Heatline IIRC) Combis for 310+VAT . They have this in Bright Orange
letter on the wall outside.

As I suspected, locally at least, the market is splitting into distinct
upper and lower segments.


--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html

"Ed Sirett" wrote in message
news
On Sun, 10 Jul 2005 18:52:39 +0100, F wrote:

Am I correct in believing that if an existing boiler is to be replaced I
must install a condensing boiler and the domestic hot water, currently
gravity fed into a copper cylinder, must be pumped?

By the book yes.

Nope. The book does not state fully pumped. There is one condensing boiler
that can give gravity DHW, although I would advise against it.

On 11/07/2005 01:13 Dave Plowman (News) wrote:

The heating coil for the cylinder may well have to be pumped,

That's what I meant.

--
F

(Beware of spam trap - remove the negative)

Am I correct in believing that if an existing boiler is to be replaced I
must install a condensing boiler and the domestic hot water, currently
gravity fed into a copper cylinder, must be pumped?

By pumped, it means that the circuit to the hot water cylinder coil must be
pumped. You can continue to have the hot water itself fed by gravity to the
taps if you wish.

The idea is that this heats the cylinder up quicker, so the boiler spends
more time off and the circuit pipes stay colder for longer, so don't waste
heat.

Christian.

In article ,
F wrote:
The heating coil for the cylinder may well have to be pumped,

That's what I meant.

Then I'd certainly go for that, as it has been good practice for perhaps
30 years or more. It allows complete control over the water temperature,
far faster warm up, and the not inconsiderable advantage that the pump has
to run each day, so doesn't end up seized at the start of winter.

--
*Reality is a crutch for people who can't handle drugs.

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

On 11/07/2005 16:48 Dave Plowman (News) wrote:

Then I'd certainly go for that, as it has been good practice for perhaps
30 years or more.

Which is about how long it is since I installed the system!

How is the pumped DHW circuit incorporated? Is there one pump on one
flow from the boiler with the pump outlet diverted to CH/DHW/both by a
motorised valve?

--
F

(Beware of spam trap - remove the negative)

In article ,
F wrote:
Then I'd certainly go for that, as it has been good practice for perhaps
30 years or more.

Which is about how long it is since I installed the system!

How is the pumped DHW circuit incorporated? Is there one pump on one
flow from the boiler with the pump outlet diverted to CH/DHW/both by a
motorised valve?

Yes - perhaps the most common is a three port valve. Although you could
use two motorised types. Or even two pumps. ;-)

--


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