"IMM" wrote in message
...

"Neil Jones" wrote in message
...

"Will" wrote in message
...
On Fri, 23 Jan 2004 11:00:34 -0000, "Neil Jones"
wrote:

Here's my house as an exercise:-

snip details

Heat loss - downstairs
======================
Floor = 70 x 0.3 x 24 = 504 W
Walls = (27*2.1 - 5.9 - 3) * 2.0 * 24 ~ 2295 W
+( 8*2.1 - 2.2 - 3) * 0.6 * 24 = 167 W
Walls Total = 2462 W

Windows = 2.2 * 4.8 * 24 = 254 W
+5.9 * 3.8 * 24 = 538 W
Windows Total = 792 W

Doors = 6 * 3 * 24 = 432 W
Ceiling = 70 * 1.6 * 3 = 336 W
Air changes = 70 * 2.1 * 0.36 * 1.5 * 24 = 1896 W

Downstairs losses = 6422 W

Heat loss - upstairs


I noted that the negative loss (ie gain) from upstairs to
downstairs
via the floor/ceiling, whilst initially noted, then became shown
as an
actual loss:-

====================
Floor = 70 x 1.6 x -3 = 336 W
^^^^^^ ^^^^^^^^

Walls = (27*2.2 - 5.9) * 2.0 * 21 ~ 2247 W
+( 8*2.2 - 2.2) * 0.6 * 21 = 194 W
Walls Total = 2441 W

Windows = 2.2 * 4.8 * 21 = 222 W
+5.9 * 3.8 * 21 = 471 W
Windows Total = 693 W

Ceiling = 70 * 0.5 * 21 = 735 W
Air changes = 70 * 2.2 * 0.36 * 1.5 * 21 = 1746 W

Upstairs losses = 5951 W

So this becomes = 5279 W

Total losses for house = 12.3kW

And this = 11.6Kw


Downstairs losses are 51.9% of total losses from house.

Now 56%


Just for accuracy's sake!


--
Regards,

Will.

I noticed that after I posted but I followed Andrew Gilligan's
example
and kept quiet until after the enquiry :-)

Did you get the main bits wrong too?



Which main bits?