On Sun, 23 Dec 2007 13:55:42 +0000, The Natural Philosopher wrote:

F wrote:
Relative lives in an inner, three story town house and needs a new
boiler. The current ~20 year old boiler is located on the ground floor
with the flue running up through the other two (concrete) floors.
There's a garage to the front and a kitchen to the rear and the boiler
is in a walk-in cupboard between the two.

She's been told that the boiler must go on an outside wall with the
flue through the wall, or on the top floor with the flue through the
flat roof.

That sounds like ******** to me.

Agreed, except for cost issues about the length of flue components etc.


Question is, why can't it go where the existing boiler is? Is there a
limit on the length of flues for modern boilers?

Varies from maker to make but invariably they are all competing with each
other to make things as long and as versatile as possible.



May be an issue with condensing types. Dunno.

One of the make requires a drain+trap at the base of vertical sections of
above a certain height.



--
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
Choosing a Boiler FAQ http://www.makewrite.demon.co.uk/BoilerChoice.html