Project with frits in some rooms

For LEED v4.0 daylighting, the LM83 standard specifies automated shades that block direct sun when ASE is above 10%.  If your frit or any other shading strategy maintains ASE below 10% (not sure if the 20% revision last year applies to shades operation), then you won't need automated shades.

As for whether frit will hinder daylighting performance, it depends on the frit density, type and color.  Many times, frit will act as a diffuser and could actually improve performance by scattering light.  I would suggest running some simulations in Radiance using detailed BSDF definitions, or in Insight Lighting (Revit) using the new Glazing type in R19 or R20 with a Transmissive Roughness factor.  This kind of detailed glazing spec is probably a good job for a professional daylighting designer.

Hi Danielle,

In LEED 4.1 ASE scores above 10% just need an explanation of how glare is being mitigated.  To my knowledge there is no guidance for the explanation, but was told by someone on the LEED EQ TAG that if you described that frit was added to mitigate glare that this thought process is all that is needed.  

Although Frit does reduce the light in a building, but does not eliminate glare since direct sun still gets between the frit pattern and blinds should still operate.  

ASE is poorly defined in 2012 LM-83 text since the range between 7-10% is undefined.  With good solar design the blinds will rarely close and you'll get great views. 

David, does Revit run sDA with the blinds operating on an hourly basis?