Can a film be installed as a form of glare control for spaces with illuminance levels above 500fc?
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NC-2009 IEQc8.1: Daylight and Views—Daylight
Can a film be installed as a form of glare control for spaces with illuminance levels above 500fc?
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TODD REED
Energy Program SpecialistPA DMVA
LEEDuser Expert
889 thumbs up
April 14, 2014 - 4:15 pm
No; glare control devises must be able to be controlled by the occupants unless automated shades are controlled.
Jill Perry, PE
ConsultantJill Perry, LLC
LEEDuser Expert
440 thumbs up
April 15, 2014 - 10:53 am
For the situation you are describing, no. But if you install the film and your simulation can show that you are still meeting the minimum footcandle requirement, not going above the 500 maximum, and you can prove you are still providing a view, then maybe. As you can see this could be tricky, because you need the optical properties of the film from the manufacturer and simulation software that knows what to do with it. You would also need to either prove to the reviewer somehow that the film doesn't obscure the view and/or install the film in the upper portion of the glazing and provide shading or glare control for the lower portion of the glazing to preserve the view.
I think the new redirecting films have potential, and want to make sure designers and reviewers don't dismiss them outright.
Eddy Santosa
Director of SustainabilityDBR Engineering Consultants
376 thumbs up
April 15, 2014 - 1:27 pm
View compliance is not required in daylight credit. As long as the illuminance levels are between the required range after adding the film, the project will comply.