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Standards Document Up for Review:

Standard 500-L-12 | Laboratory Methods of Testing Louvers for Rating

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Section/Figure/Table #: Annex F.1
clarify in paragraph and that values in the table are based on "core" area of the louver. May be in other places as well.

Mike Steele
Greenheck Fan
Posted: April 6, 2017

Section/Figure/Table #: Figure 1, for both Horz. and Vert.
The asterisk needs to include a note to ignore any minimum distance caused by a an adjustable blade pin or pin connection component that is only at the last few inches of the blade.

Proposed Change:
Add to asterisk "If an adjustable blade’s non-uniform end condition (rotation pin, pin receptor, or similar), is the reason for the most restrictive distance between the blades, then the A, B, and/or C space can be measured within 25.4 mm (1 in.) next to the non-uniform end condition. "

Mike Steele
Greenheck Fan
Posted: September 26, 2017

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