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USGBC LEED-AP-Homes Exam Syllabus Topics:

Topic	Details
Topic 1	Regional Priority Credits: This section of the exam measures the skills of a Regional Performance Advisor. It covers specific environmental credits that reflect local priorities, enabling tailored certification strategies that align with regional ecosystems or regulatory contexts.
Topic 2	Innovation: This section of the exam measures the skills of a Design Innovation Lead. It invites professionals to explore creative and exemplary strategies that surpass standard credits—such as pilot projects or pioneering sustainability solutions—demonstrating forward-thinking in residential design.
Topic 3	Location & Transportation: This section of the exam measures the skills of an Environmental Planner. It focuses on how homes integrate with their surroundings and connect to transportation networks, emphasizing sustainable siting strategies aligned with urban planning practices.
Topic 4	Energy and Atmosphere: This section of the exam measures the skills of a Green Building Engineer. It includes evaluating the principles of energy efficiency, performance optimization, and emissions reduction in residential design, all critical to minimizing environmental impact while meeting occupant needs.
Topic 5	Materials & Resources: This section of the exam measures the skills of a Sustainability Specialist. It emphasizes the selection and management of eco-friendly materials, efficient usage of resources, and implementation of waste reduction strategies to support green residential construction.

USGBC LEED AP Homes (Residential) Exam Sample Questions (Q22-Q27):

NEW QUESTION # 22
The use of native plants in place of conventional turf grass can increase which of the following?

A. Fertilizer demand
B. Pesticide demand
C. Irrigation demand
D. Native wildlife habitat

Answer: D

Explanation:
TheLEED for Homes Rating System (v4)encourages the use of native plants in theSustainable Sites (SS) Credit: Site Development - Protect or Restore HabitatandWater Efficiency (WE) Credit: Outdoor Water Useto enhance environmental benefits, including support for local ecosystems.
According to theLEED Reference Guide for Homes Design and Construction (v4):
SS Credit: Site Development - Protect or Restore Habitat (1-2 points)
Using native plants in place of conventional turf grass increases native wildlife habitat by providing food, shelter, and breeding areas for local species, supporting biodiversity.
Source: LEED Reference Guide for Homes Design and Construction, v4, Sustainable Sites Credit: Site Development - Protect or Restore Habitat, p. 74.
TheLEED v4.1 Residential BD+Crating system confirms:
SS Credit: Site Development - Protect or Restore Habitat
Native plants enhance native wildlife habitat by creating ecosystems that support local fauna, unlike turf grass, which offers minimal ecological value.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isnative wildlife habitat(Option B), as native plants are adapted to local conditions and support indigenous species, unlike turf grass.
Why not the other options?
Reference: LEED Reference Guide for Homes Design and Construction, v4, WE Credit: Outdoor Water Use, p. 98.
C). Irrigation demand: Native plants reduce irrigation needs compared to turf grass, which requires more water.Reference: LEED Reference Guide for Homes Design and Construction, v4, WE Credit: Outdoor Water Use, p. 98.
D). Pesticide demand: Native plants are more resistant to local pests, reducing pesticide use compared to turf grass.Reference: LEED Reference Guide for Homes Design and Construction, v4, SS Credit: Nontoxic Pest Control, p. 82.
TheLEED AP Homes Candidate Handbookemphasizes SS credits, including habitat restoration, and references theLEED Reference Guide for Homes Design and Constructionas a key resource. The exam is based onLEED v4, ensuring the relevance of native plants for wildlife.
References:
LEED Reference Guide for Homes Design and Construction, v4, USGBC, Sustainable Sites Credit: Site Development - Protect or Restore Habitat, p. 74.
LEED v4.1 Residential BD+C, USGBC LEED Credit Library, accessed via LEED Online (https://www.
usgbc.org/credits).
LEED AP Homes Candidate Handbook, GBCI, October 2024, p. 12 (references study resources and exam scope based on LEED v4).
USGBC LEED for Homes Rating System (v4), available via USGBC website (https://www.usgbc.org
/resources/leed-homes-design-and-construction-v4).
LEED v4.1 for Homes, USGBC, accessed via LEED Online, confirming wildlife habitat benefits.

NEW QUESTION # 23
Points can be earned for Energy and Atmosphere Credit: Efficient Hot Water Distribution System, Option 1 through which of the following measures?

A. Insulating all domestic hot water piping to R-4
B. Installing central manifold distribution
C. Limiting branch line length
D. Installing demand-controlled recirculation

Answer: C

Explanation:
TheLEED for Homes Rating System (v4)includes theEnergy and Atmosphere (EA) Credit: Efficient Hot Water Distribution System, which aims to reduce energy and water waste in hot water delivery.Option 1:
Length of Pipingfocuses on minimizing the length of hot water piping to reduce heat loss and delivery time.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EA Credit: Efficient Hot Water Distribution System, Option 1. Length of Piping (1-2 points) Design and install the hot water distribution system to meet one of the following requirements:
* Maximum branch line length: The length of any branch line from the water heater or hot water source to any fixture must not exceed 20 feet (6 meters) for 1 point, or 10 feet (3 meters) for 2 points.This reduces the volume of water that must be purged before hot water reaches the fixture, saving energy and water.Source: LEED Reference Guide for Homes Design and Construction, v4, Energy and Atmosphere Credit: Efficient Hot Water Distribution System, p. 132.
TheLEED v4.1 Residential BD+Crating system maintains this requirement:
EA Credit: Efficient Hot Water Distribution
Option 1: Limit the length of branch lines from the water heater to fixtures to 20 feet (6 meters) for 1 point or
10 feet (3 meters) for 2 points.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
Limiting branch line length(Option A) directly aligns with Option 1 of this credit, as it reduces the distance hot water must travel, minimizing heat loss and water waste.
Why not the other options?
Reference: LEED Reference Guide for Homes Design and Construction, v4, EA Credit: Efficient Hot Water Distribution System, p. 133.
C). Installing demand-controlled recirculation: This is part ofOption 3: Demand-Controlled Recirculation in LEED v4, where recirculation systems are activated only when hot water is needed (e.g., via a button or motion sensor). It is not part of Option 1.Reference: LEED Reference Guide for Homes Design and Construction, v4, EA Credit: Efficient Hot Water Distribution System, p. 133.
D). Insulating all domestic hot water piping to R-4: While pipe insulation is a best practice and may be required in some EA credits (e.g., EA Prerequisite: Minimum Energy Performance), it is not a specific requirement for Option 1 of the Efficient Hot Water Distribution System credit. Insulation reduces heat loss but does not address branch line length.Reference: LEED Reference Guide for Homes Design and Construction, v4, EA Prerequisite: Minimum Energy Performance, p. 112.
TheLEED AP Homes Candidate Handbookemphasizes EA credits, including hot water distribution, and references theLEED Reference Guide for Homes Design and Constructionas a key resource. The exam is based onLEED v4, ensuring the relevance of Option 1's focus on branch line length.
References:
LEED Reference Guide for Homes Design and Construction, v4, USGBC, Energy and Atmosphere Credit: Efficient Hot Water Distribution System, p. 132-133.
LEED v4.1 Residential BD+C, USGBC LEED Credit Library, accessed via LEED Online (https://www.
usgbc.org/credits).
LEED AP Homes Candidate Handbook, GBCI, October 2024, p. 12 (references study resources and exam scope based on LEED v4).
USGBC LEED for Homes Rating System (v4), available via USGBC website (https://www.usgbc.org
/resources/leed-homes-design-and-construction-v4).
LEED v4.1 for Homes, USGBC, accessed via LEED Online, confirming branch line length criteria.

NEW QUESTION # 24
In addition to testing envelope leakage for energy impacts, a blower door test can be used in attached housing projects to evaluate:

A. Flow rate of local exhaust and supply fans or hoods
B. Quantity of moisture transfer through common wall systems
C. Potential for environmental tobacco smoke and odor contamination
D. Effectiveness of non-toxic strategies designed to control pests

Answer: C

Explanation:
TheLEED for Homes Rating System (v4)requires blower door testing in theEnergy and Atmosphere (EA) Credit: Air Infiltrationto measure envelope leakage, but it also has applications inIndoor Environmental Quality (EQ)credits for attached housing (e.g., multifamily or semi-detached homes) to assess air transfer between units.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EQ Credit: Compartmentalization (1 point, multifamily)
In attached housing projects, use a blower door test to evaluate the potential for environmental tobacco smoke and odor contamination between units by measuring air leakage through common walls and ensuring effective sealing. This ensures indoor air quality by preventing unwanted air transfer.
Source: LEED Reference Guide for Homes Design and Construction, v4, Indoor Environmental Quality Credit: Compartmentalization, p. 152.
TheLEED v4.1 Residential BD+Crating system confirms:
EQ Credit: Compartmentalization
Blower door testing in attached housing verifies the airtightness of shared walls, reducing the potential for environmental tobacco smoke, odors, or other contaminants to transfer between units.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer ispotential for environmental tobacco smoke and odor contamination(Option D), as blower door tests in attached housing assess air leakage through common walls, which can carry smoke or odors.
Why not the other options?
Reference: LEED Reference Guide for Homes Design and Construction, v4, EQ Credit: Enhanced Ventilation, p. 146.
B). Quantity of moisture transfer through common wall systems: While air leakage can carry moisture, blower door tests focus on air, not moisture quantification.Reference: LEED Reference Guide for Homes Design and Construction, v4, EQ Credit: Compartmentalization, p. 152.
C). Effectiveness of non-toxic strategies designed to control pests: Pest control strategies are addressed in EQ Credit: Contaminant Control, not evaluated via blower door tests.Reference: LEED Reference Guide for Homes Design and Construction, v4, EQ Credit: Contaminant Control, p. 148.
TheLEED AP Homes Candidate Handbookemphasizes EQ credits, including compartmentalization, and references theLEED Reference Guide for Homes Design and Constructionas a key resource. The exam is based onLEED v4, ensuring the relevance of blower door testing for smoke and odor control.
References:
LEED Reference Guide for Homes Design and Construction, v4, USGBC, Indoor Environmental Quality Credit: Compartmentalization, p. 152.
LEED v4.1 Residential BD+C, USGBC LEED Credit Library, accessed via LEED Online (https://www.
usgbc.org/credits).
LEED AP Homes Candidate Handbook, GBCI, October 2024, p. 12 (references study resources and exam scope based on LEED v4).
USGBC LEED for Homes Rating System (v4), available via USGBC website (https://www.usgbc.org
/resources/leed-homes-design-and-construction-v4).
LEED v4.1 for Homes, USGBC, accessed via LEED Online, confirming compartmentalization testing.

NEW QUESTION # 25
For a two-bedroom unit in a multi-family building, a kitchen's minimum airflow requirement for intermittent local exhaust is:

A. 200 cfm (94 lps)
B. 1 cfm per ft² (5.08 lps per m²)
C. 2.5 cfm per ft² (12.7 lps per m²)
D. 100 cfm (47 lps)

Answer: D

Explanation:
TheLEED for Homes Rating System (v4)addresses kitchen ventilation requirements in theIndoor Environmental Quality (EQ) Prerequisite: Ventilation, which referencesASHRAE Standard 62.2-2010 for minimum airflow rates in residential buildings, including multi-family units.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EQ Prerequisite: Ventilation
For intermittent local exhaust in kitchens, ASHRAE Standard 62.2-2010 requires a minimum airflow rate of
100 cfm (47 lps) for each kitchen to effectively remove cooking-related pollutants and moisture, regardless of the number of bedrooms.
Source: LEED Reference Guide for Homes Design and Construction, v4, Indoor Environmental Quality Prerequisite: Ventilation, p. 142.
TheLEED v4.1 Residential BD+Crating system confirms:
EQ Prerequisite: Ventilation
Intermittent local exhaust in kitchens must provide at least 100 cfm (47 lps) per ASHRAE 62.2-2010 to ensure adequate ventilation in multi-family units, including two-bedroom units.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer is100 cfm (47 lps)(Option A), as this is the minimum airflow requirement for intermittent kitchen exhaust per ASHRAE 62.2-2010.
Why not the other options?
* B. 200 cfm (94 lps): This exceeds the minimum requirement for intermittent kitchen exhaust.
* C. 1 cfm per ft² (5.08 lps per m²): Kitchen exhaust is not based on floor area but on a fixed rate (100 cfm).
Reference: LEED Reference Guide for Homes Design and Construction, v4, EQ Prerequisite: Ventilation, p.
142.
TheLEED AP Homes Candidate Handbookemphasizes EQ prerequisites, including ventilation requirements, and references theLEED Reference Guide for Homes Design and Constructionas a key resource. The exam is based onLEED v4, ensuring the relevance of ASHRAE 62.2-2010.
References:
LEED Reference Guide for Homes Design and Construction, v4, USGBC, Indoor Environmental Quality Prerequisite: Ventilation, p. 142.
LEED v4.1 Residential BD+C, USGBC LEED Credit Library, accessed via LEED Online (https://www.
usgbc.org/credits).
LEED AP Homes Candidate Handbook, GBCI, October 2024, p. 12 (references study resources and exam scope based on LEED v4).
USGBC LEED for Homes Rating System (v4), available via USGBC website (https://www.usgbc.org
/resources/leed-homes-design-and-construction-v4).
LEED v4.1 for Homes, USGBC, accessed via LEED Online, confirming kitchen exhaust requirements.

NEW QUESTION # 26
A home has a large shower compartment of 3,750 in² (2.4 m²) with dual 1.5 gpm (5.6 lpm) shower heads.
How should the flow rate be calculated?

A. The flow rates are added to total 3.0 gpm (11.2 lpm)
B. The flow rate is calculated as two separate compartments of 1.5 gpm (5.6 lpm)
C. Shower compartment size does not affect shower head flow rates for LEED compliance
D. Multiple shower heads are not allowed

Answer: D

Explanation:
TheLEED for Homes Rating System (v4)addresses shower compartments in theWater Efficiency (WE) Credit: Indoor Water Use, where the size and number of showerheads impact water use calculations.
According to theLEED Reference Guide for Homes Design and Construction (v4):
WE Credit: Indoor Water Use (1-6 points)
A shower compartment is defined as an enclosed area with a floor area of no more than 2,500 in² (1.6 m²), where all fixtures (e.g., multiple showerheads) count as a single fixture for water use calculations.
Compartments larger than 2,500 in² are considered multiple compartments, and multiple showerheads in such cases are not allowed for LEED compliance to ensure water efficiency.
Source: LEED Reference Guide for Homes Design and Construction, v4, Water Efficiency Credit: Indoor Water Use, p. 96.
TheLEED v4.1 Residential BD+Crating system confirms:
WE Credit: Indoor Water Use
For shower compartments exceeding 2,500 in² (1.6 m²), multiple showerheads are not permitted to maintain water efficiency goals. Each compartment must be treated separately if applicable, but large compartments cannot have multiple heads.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The shower compartment is 3,750 in² (2.4 m²), exceeding the 2,500 in² limit. Therefore,multiple showerheads are not allowed(Option C), as LEED restricts multiple heads in oversized compartments to ensure water efficiency.
Why not the other options?
Reference: LEED Reference Guide for Homes Design and Construction, v4, WE Credit: Indoor Water Use, p.
96.
B). The flow rate is calculated as two separate compartments of 1.5 gpm (5.6 lpm): The compartment is one unit, and multiple heads are not allowed, not treated as separate compartments.Reference: LEED Reference Guide for Homes Design and Construction, v4, WE Credit: Indoor Water Use, p. 96.
D). Shower compartment size does not affect shower head flow rates for LEED compliance:
Compartment size directly affects whether multiple heads are allowed.Reference: LEED Reference Guide for Homes Design and Construction, v4, WE Credit: Indoor Water Use, p. 96.
TheLEED AP Homes Candidate Handbookemphasizes WE credits, including showerhead calculations, and references theLEED Reference Guide for Homes Design and Constructionas a key resource. The exam is based onLEED v4, ensuring the relevance of compartment size restrictions.
References:
LEED Reference Guide for Homes Design and Construction, v4, USGBC, Water Efficiency Credit:
Indoor Water Use, p. 96.
LEED v4.1 Residential BD+C, USGBC LEED Credit Library, accessed via LEED Online (https://www.
usgbc.org/credits).
LEED AP Homes Candidate Handbook, GBCI, October 2024, p. 12 (references study resources and exam scope based on LEED v4).
USGBC LEED for Homes Rating System (v4), available via USGBC website (https://www.usgbc.org
/resources/leed-homes-design-and-construction-v4).
LEED v4.1 for Homes, USGBC, accessed via LEED Online, confirming showerhead restrictions.

NEW QUESTION # 27
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