[Radiance-general] Re: Prismatic glazings

[Axel Jacobs]

Hi Marija,

> First question is where to find valid optical and geometrical data related
> to prismatic glazings. On various manufacturers' sites, like Siteco or
> Inglas, there is only some descriptive info ,without any data useful for
> simulations. I've found that some measuremens have been taken by Martin
> Moeck few years ago for Siteco glazings. Are results available somewhere?

I can't answer any of your technical questions, but I spoke to a Siteco
rep a few months ago. I ask her about Radiance cal files for their fancy
glazing. Her reply was that Siteco do have Radiance descriptions of 
their advances glazing products, but are 'very reluctant' to give them 
to anybody.

Her explanation to this was that in order to get that advanced glazing 
working correctly, the optimum orientation of the panels needs to be 
determined based on window orientation and slope. It is quite easy to 
get this wrong, in which case the product would actually reduce the 
daylight rather than improving it. Subsequently, Siteco's product would 
appear to be rubbish.

With this in mind, Siteco do free-of-charge calculations when you decide 
to go with one of their products, making sure that if someone gets it 
wrong, it'll be them.

Cheers

Axel