Area of a construciton

adamovsky · Posts: 5

Hello, I have a little misunderstanding to areas of block parts, which are shown o left Navigate, Site menu. To this message is attached file including box with dimensions 8 m x 6 m and height 2.7 m. So for example ground floor should have area 8 x 6 = 48 m2. But 40.345 m2 is on the menu. The box�s wall thickness is 0.087 m so ground floor area calculated form inner dimensions is 45.6 m2.

What does cause so huge difference???

P.S. The program verion is 1.2.0.026

Steve Potter · Posts: 572 Location: newcastle

If you use construction lines to measure the internal dimensions of the block, you will see that the dimensions are 7.43m x 5.43m, giving a floor area of 40.35m2 which is the zone floor area displayed in the navigator. The external dimensions of the block are 8m x 6m which means that the external perimeter wall is actually 0.285m thick.

I think what may have happened is that you created the block using a construction having a thickness of 0.285m but then later changed the construction to a much thinner one (0.087m). In the current version of DB, the thickness of a wall remains the same once you have drawn it, regardless of any later changes that you make to the construction. This is something that we will remedy in the near future. However, please note that the correct construction thickness is passed to EnergyPlus.

Regards,

Steve Potter

Andy Tindale · Posts: 2432 Location: Stroud

See also knowledge base article based on this support request:

http://www.designbuilder.co.uk/supportdesk/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=29&nav=0,11

phoenix · Posts: 1

I've just started using this program and I was wondering whether this problem has been solved in the new 1.4 version (I've just downloaded it) or not...

L.F. Phoenix

Steve Potter · Posts: 572 Location: newcastle

In all versions following version 1.4.0.034, the external wall thickness of blocks can now be changed retrospectively.

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