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US Green Building Council LEED-AP-O+M Exam - Topic 3 Question 21 Discussion

Actual exam question for US Green Building Council's LEED-AP-O+M exam
Question #: 21
Topic #: 3
[All LEED-AP-O+M Questions]

Which of the following appliances are included in Water Efficiency Prerequisite, Indoor Water Use Reduction?

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Suggested Answer: B

The Water Efficiency Prerequisite, Indoor Water Use Reduction, under LEED AP O+M V4.1, includes the reduction of water use in various indoor appliances. The appliances included in this prerequisite are those that contribute significantly to indoor water use. Among the options provided, residential clothes washers and dishwashers are included.These appliances use a significant amount of water and are therefore important targets for water use reduction1.


LEED v4 Indoor Water Use Reduction Calculator

Indoor water use reduction | U.S. Green Building Council

LEED v4 water efficiency credits: Do you know the new standards?

LEED QUALIFICATION GUIDE - v4 - Sloan

by Frederica at Nov 21, 2025, 12:48 AM

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Mitsue
5 days ago
But B is definitely the best choice for indoor use reduction!
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Britt
11 days ago
I feel like C could be a trick option. Fountains are often overlooked.
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Herman
16 days ago
No way, A doesn't fit the water efficiency theme.
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Tori
21 days ago
What about A? Dishwashers and coffee makers?
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Graham
26 days ago
I agree, B seems right. They use a lot of water.
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Leatha
1 month ago
Definitely not A, those appliances don’t use enough water.
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Sarah
1 month ago
I’m not so sure about that, I thought drinking fountains were in there too.
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Celeste
2 months ago
Wait, are coffee makers really not included? That’s surprising!
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Kenneth
2 months ago
Haha, I bet the person who wrote option D was thirsty and wanted a free drink from the vending machine. But B is the correct choice.
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Kate
2 months ago
D? Vending machines? Really? I'm pretty sure that's not what they're looking for here. B is the way to go.
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Kati
2 months ago
C'mon, who would include drinking fountains in indoor water use reduction? That's just silly. B is the right answer.
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Tijuana
3 months ago
Option B makes the most sense to me. Clothes washers and dishwashers are the biggest water consumers in a household.
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Mi
3 months ago
I think the correct answer is B. Residential clothes washers and dishwashers are the appliances included in the Water Efficiency Prerequisite.
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Muriel
3 months ago
I’m leaning towards option B since it mentions both clothes washers and dishwashers, which seem more relevant to indoor water use.
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Arletta
3 months ago
I feel like dishwashers are included, but I can’t recall if drinking fountains are considered in the prerequisite.
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Vincenza
3 months ago
I remember practicing a question about water-efficient appliances, and I think residential clothes washers were definitely part of it.
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Heike
3 months ago
I think the Indoor Water Use Reduction focuses on appliances that significantly impact water usage, but I’m not sure if coffee makers are included.
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Lea
4 months ago
This is a good question. I'm pretty confident I can figure this out by reviewing the details of the Water Efficiency Prerequisite. I'll take my time and make sure I select the right answer.
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Buffy
4 months ago
I'm a little unsure about this one. I know the Water Efficiency Prerequisite is important, but I'm not totally clear on the specific appliances it covers. I'll have to think this through carefully.
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Delfina
4 months ago
Okay, I've got this. The key is remembering that the Water Efficiency Prerequisite is focused on indoor water use reduction, so the correct answer has to be the appliances that are included in that specific requirement.
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Janey
4 months ago
I think it's B) Residential clothes washers and dishwashers.
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Dyan
4 months ago
I think it's B. Clothes washers and dishwashers make sense.
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Cyril
5 months ago
Totally agree, B makes the most sense!
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Dalene
5 months ago
Hmm, this seems straightforward, but I want to double-check the details. I'll eliminate the options that don't seem relevant and focus on the ones about residential clothes washers and dishwashers.
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Milly
5 months ago
I think this is asking about the specific appliances included in the Water Efficiency Prerequisite for indoor water use reduction. I'll need to review the details of that prerequisite to determine the correct answer.
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Devorah
5 hours ago
I believe it's B) Residential clothes washers and dishwashers.
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Barb
5 months ago
I’m leaning towards D) Residential clothes washers and vending machines.
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