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US Green Building Council LEED-AP-ID+C Exam - Topic 6 Question 29 Discussion

Posted by Hildred on Jun 26, 2026 at 02:56 PM

A tenant implements the following strategies to reduce the amount of water used. Which strategy is applicable to the Water Efficiency Credit, Indoor Water Use Reduction for LEED Interior Design and Construction: Commercial Interiors?

Suggested Answer: A

The composting toilet is applicable to the Water Efficiency Credit, Indoor Water Use Reduction for LEED Interior Design and Construction: Commercial Interiors because it significantly reduces the amount of water used for conventional flushing toilets. By composting human waste, this system eliminates the need for water in the disposal process, contributing to indoor water use reduction.


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23 comments · newest first
MI
Micaela 1 day ago
C makes sense. It directly reduces indoor water use.
CH
Cherry 6 days ago
I feel like A) Composting toilet could work too, but not for this credit.
MA
Marge 12 days ago
I think the answer is C) Commercial clothes washer.
KA
Karan 17 days ago
C) is definitely the best choice for LEED.
ER
Erin 22 days ago
Right, indoor strategies are key for this credit.
SA
Samira 27 days ago
B) Low-flow irrigation is more for outdoor use, not indoor.
VE
Vernice 1 month ago
A) Composting toilet could be a good option too, but not for this credit.
KA
Karan 1 month ago
I agree! Clothes washers are crucial for indoor use.
ER
Erin 1 month ago
I think it's C) Commercial clothes washer. It saves a lot of water.
TR
Trinidad 2 months ago
Totally agree, low-flow fixtures are a must for LEED!
EL
Ellsworth 2 months ago
Not sure if a composting toilet counts for this credit.
TA
Tayna 2 months ago
I thought roof runoff was more for outdoor use?
PO
Pok 2 months ago
Definitely C, commercial clothes washers are key for indoor use.
JU
Justa 2 months ago
A composting toilet can save a ton of water!
VE
Veronique 2 months ago
Totally agree, low-flow fixtures are a must for LEED!
GA
Gary 3 months ago
Not sure if a composting toilet counts for this credit.
AN
Annice 3 months ago
I thought roof runoff was more for outdoor use?
SA
Santos 3 months ago
Definitely C, commercial clothes washers are key for indoor use.
RE
Renea 3 months ago
A composting toilet can save a ton of water!
VI
Vincenza 3 months ago
I feel like roof runoff is more about outdoor water management, so I don't think that one would count for this credit.
BE
Beata 3 months ago
The commercial clothes washer seems like it could fit the criteria for indoor water use reduction, but I need to double-check the specifics.
MI
Micah 4 months ago
I remember practicing a question about low-flow fixtures, but I can't recall if that applies here.
RE
Rebbecca 4 months ago
I think the composting toilet might be a good option, but I'm not entirely sure if it qualifies for the LEED credit.
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