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US Green Building Council LEED-AP-ID+C Exam - Topic 4 Question 25 Discussion

A tenant moves into an existing building where no modifications to the building envelope will be made. What credit would be affected by the visible light transmittance of the existing exterior glazing?
A) Indoor Environmental Quality Credit, Daylight
B) Indoor Environmental Quality Credit, Quality Views
C) Materials and Resources Credit, Interiors Life-Cycle Impact Reduction
D) Energy and Atmosphere Credit, Fundamental Commissioning and Verification

US Green Building Council LEED-AP-ID+C Exam - Topic 4 Question 25 Discussion

Actual exam question for US Green Building Council's LEED-AP-ID+C exam
Question #: 25
Topic #: 4
[All LEED-AP-ID+C Questions]

A tenant moves into an existing building where no modifications to the building envelope will be made. What credit would be affected by the visible light transmittance of the existing exterior glazing?

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Suggested Answer: A

The visible light transmittance of the existing exterior glazing affects the amount of natural light that penetrates the space, which is directly related to the Indoor Environmental Quality Credit for Daylight. This credit assesses the daylighting conditions in occupied spaces to promote occupants' comfort and well-being.Since no modifications to the building envelope are being made, the existing glazing's light transmittance will influence the daylight credit's performance1.


LEED v4 Reference Guide for Interior Design and Construction, specifically the section on Indoor Environmental Quality Credit: Daylight1.

by Sylvia at May 06, 2026, 02:04 PM

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Noah
26 days ago
I'm a bit confused. I thought visible light transmittance was more about energy efficiency rather than indoor quality. Could it really be about Indoor Environmental Quality?
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Latricia
1 month ago
I remember practicing a question like this where we discussed how glazing affects indoor environments. I feel like it's definitely about daylight.
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Joni
1 month ago
I think it might be related to daylight, but I'm not entirely sure if it's specifically for the Daylight credit or the Quality Views credit.
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