
The vent system will of course be installed before the building is signed off and cleaned up ready for use. You'll get building dust etc in the air, and transferred when the system is tested.
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Tue 4 Nov 2008, 16:41,
archived)

and a new vent system put in, and not used yet?
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Tue 4 Nov 2008, 16:44,
archived)

Yes, in that case, it would be spanking new and clean - but you mentioned an entire new building. once installed however, a system does not remain as shiny as Hollywood would have us believe.
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Tue 4 Nov 2008, 16:45,
archived)

www.intuitor.com/moviephysics/
if you haven't seen it already...
( ,
Tue 4 Nov 2008, 16:51,
archived)
if you haven't seen it already...