John Stumbles wrote:
On Thu, 05 Jan 2006 14:24:55 +0000, DJC wrote:
John Stumbles wrote:
My spreadsheet is at http://82.24.138.95/~john/boiler_sizing.xls (or
http://82.24.138.95/~john/boiler_sizing.sxc if you have OpenOffice)

Seems to be broken on your spreadsheet too. (OO version).

How do you mean?

Not in respect of the roof of the flat - if you don't put a 1 in any of
the roof options boxes then the 'roof heat loss' figure (cell B18) is 0.

Perhaps it is just rather confusing then; a case of the user interface
rather than the calculation itself. A note that putting 0 in the roof
section is an option rather than "Put '1' in one of these boxes"

Perhaps as the the roof calc is conditional on B9 being 1, a note to
the effect that "Nr. of external walls,roof,floor" can be modified from
the default. I realise a roof and a ceiling are not the same thing but
these things do confuse, even if the roof is not imediately below my
flat I still have a roof over my head.(Is there always a floor value for
a flat or does floor in this case mean ground floor?)
Also I need to set the window factor to 0.35 rather than 1 to make
window area represent my window area, And External walls 1.5 allowing
for the stairwell in common parts.
Water heating default is 2000kW, not 2kW?

Depending on how I interpret the required input my results vary from
4.6kW to over 7kW.

[No matter in my case, as that's less than the lowest modulated output
of my combi.]



--
David Clark

$message_body_include ="PLES RING IF AN RNSR IS REQIRD"