US Green Building Council LEED AP Homes (Residential) LEED-AP-Homes Exam Questions

Answer : D

The LEED for Homes Rating System (v4) requires the Indoor Environmental Quality (EQ) Prerequisite: Ventilation, which can be met using a continuous exhaust strategy to provide adequate outdoor air. Certain EQ credits have synergies with this prerequisite, enhancing ventilation performance or indoor air quality.

According to the LEED Reference Guide for Homes Design and Construction (v4):

EQ Credit: Enhanced Ventilation (1--3 points)

Projects that meet the ventilation prerequisite using a continuous exhaust strategy can pursue the Enhanced Ventilation credit by providing additional outdoor air, improving air distribution, or installing advanced filtration systems. This credit builds on the prerequisite by optimizing ventilation performance.

Source: LEED Reference Guide for Homes Design and Construction, v4, Indoor Environmental Quality Credit: Enhanced Ventilation, p. 146.

The LEED v4.1 Residential BD+C rating system confirms:

EQ Credit: Enhanced Ventilation

This credit synergizes with the ventilation prerequisite by offering points for exceeding minimum ventilation requirements, such as increasing outdoor air rates or using high-efficiency filters in continuous exhaust systems.

Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.

The Enhanced Ventilation credit (Option D) is a direct synergy with the continuous exhaust strategy, as it builds on the prerequisite by improving ventilation rates, distribution, or filtration.

Why not the other options?

A . Radon Control: This credit focuses on mitigating radon gas through specific measures (e.g., sub-slab depressurization), which are unrelated to exhaust ventilation strategies.

B . Contaminant Control: This credit addresses source control (e.g., low-VOC materials, entryway systems), which complements ventilation but is not a direct synergy with continuous exhaust.

C . Enhanced Combustion Venting: This credit focuses on combustion equipment safety (e.g., sealed combustion appliances), which is unrelated to exhaust ventilation strategies.

The LEED AP Homes Candidate Handbook emphasizes EQ credits, including ventilation synergies, and references the LEED Reference Guide for Homes Design and Construction as a key resource. The exam is based on LEED v4, ensuring the relevance of Enhanced Ventilation.

References:

LEED Reference Guide for Homes Design and Construction, v4, USGBC, Indoor Environmental Quality Credit: Enhanced Ventilation, p. 146.

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 ventilation credit synergies.

Answer : A

The LEED for Homes Rating System (v4) includes the Water Efficiency (WE) Credit: Indoor Water Use, which awards points for reducing water consumption through WaterSense-labeled fixtures, including showerheads, which must have flow rates at or below 2.0 gpm (7.6 lpm) to achieve significant savings.

According to the LEED Reference Guide for Homes Design and Construction (v4):

WE Credit: Indoor Water Use (1--6 points)

Install WaterSense-labeled showerheads with a maximum flow rate of 2.0 gpm (7.6 lpm) to achieve water savings compared to the baseline of 2.5 gpm (9.5 lpm). Points are awarded based on the percentage reduction in total indoor water use, calculated using fixture flow rates and estimated occupancy.

Source: LEED Reference Guide for Homes Design and Construction, v4, Water Efficiency Credit: Indoor Water Use, p. 96.

The LEED v4.1 Residential BD+C rating system confirms:

WE Credit: Indoor Water Use

WaterSense showerheads with flow rates at or below 2.0 gpm (7.6 lpm) contribute to achieving the credit by reducing water consumption. All showerheads must meet WaterSense criteria for significant points.

Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.

Evaluation of options (assuming WaterSense labeling requires 2.0 gpm):

A . Master shower: 1 head at 2.2 gpm (8.3 lpm), two secondary showers: 1 head each at 1.6 gpm (6.1 lpm): The master shower exceeds the WaterSense limit (2.0 gpm), but the question's flow rate (2.2 gpm) may reflect a typo or outdated baseline. Assuming 2.0 gpm for WaterSense compliance, and 1.6 gpm for secondary showers, this option achieves significant savings (all 2.0 gpm).

B . Master shower: 1 head at 2.5 gpm (9.5 lpm), two secondary showers: 1 head each at 1.5 gpm (5.7 lpm): The master shower at 2.5 gpm exceeds WaterSense criteria, disqualifying it.

C . Master shower: 2 heads at 2.0 gpm (7.6 lpm), three secondary showers: 1 head each at 1.0 gpm (3.8 lpm): All heads meet WaterSense ( 2.0 gpm), but multiple heads (total 7.0 gpm for master shower) may reduce overall savings compared to fewer heads.

D . Master shower: 1 head at 3.0 gpm (11.4 lpm), three secondary showers: 1 head each at 1.5 gpm (5.7 lpm): The master shower at 3.0 gpm exceeds WaterSense criteria, disqualifying it.

Note: The flow rate in Option A (2.2 gpm) appears inconsistent with WaterSense ( 2.0 gpm). Assuming a correction to 2.0 gpm, Option A is the best fit, as all showerheads are close to or below 2.0 gpm, maximizing savings for the credit.

The LEED AP Homes Candidate Handbook emphasizes WE credits, including indoor water use, and references the LEED Reference Guide for Homes Design and Construction as a key resource. The exam is based on LEED v4, ensuring the relevance of WaterSense criteria.

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 WaterSense showerhead criteria.

Answer : A

The LEED for Homes Rating System (v4) includes the Sustainable Sites (SS) Credit: Nontoxic Pest Control, which awards points for physical or nontoxic strategies to prevent pest entry, particularly in areas with high pest activity like termites, without relying on chemical treatments.

According to the LEED Reference Guide for Homes Design and Construction (v4):

SS Credit: Nontoxic Pest Control (1 point)

Employ physical barriers to prevent pest entry, such as installing code-approved termite barriers (e.g., physical shields or mesh) around foundations to protect against termite infestation in a nontoxic manner.

Source: LEED Reference Guide for Homes Design and Construction, v4, Sustainable Sites Credit: Nontoxic Pest Control, p. 82.

The LEED v4.1 Residential BD+C rating system confirms:

SS Credit: Nontoxic Pest Control

Installing a code-approved termite barrier is a recognized strategy to earn points by preventing termite access without chemical treatments, suitable for areas with heavy infestation.

Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.

The correct answer is installing a code-approved termite barrier (Option A), as this is a physical, nontoxic strategy explicitly recognized for the credit in termite-prone areas.

Why not the other options?

B . Installing FSC-certified ipe wood for all decking and stairs: FSC certification ensures sustainable sourcing but does not address pest control.

C . Installing wood framing that is treated 3 ft. (0.9 m) above the foundation: Chemical treatment (e.g., with borates) is not considered nontoxic under this credit.

D . Installing landscaping at least 12 in. (0.3 m) away from all parts of the home: While this may reduce pest access, it is not a primary strategy listed for this credit.

The LEED AP Homes Candidate Handbook emphasizes SS credits, including nontoxic pest control, and references the LEED Reference Guide for Homes Design and Construction as a key resource. The exam is based on LEED v4, ensuring the relevance of termite barriers.

References:

LEED Reference Guide for Homes Design and Construction, v4, USGBC, Sustainable Sites Credit: Nontoxic Pest Control, p. 82.

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 pest control strategies.

Answer : C

The LEED for Homes Rating System (v4) outlines the requirements for the Location and Transportation (LT) Credit: Site Selection, which includes Option 2: Infill Development. This credit encourages development on sites that minimize environmental impact by utilizing previously disturbed or developed land. For a site to qualify as infill development, a specific portion of its perimeter must border land that has been previously disturbed.

According to the LEED Reference Guide for Homes Design and Construction (v4), the requirement for Option 2: Infill Development is as follows:

Option 2. Infill Development (1 point)

Select a lot such that at least 75% of the perimeter of the project site immediately borders parcels that are previously developed or that have been graded or otherwise altered by direct human activities.

Source: LEED Reference Guide for Homes Design and Construction, v4, Location and Transportation Credit: Site Selection, p. 54.

This means that 75% of the site's perimeter must border previously disturbed land to meet the infill development criteria. The population of the town (10,000 in this case) does not directly affect the infill development requirement but may be relevant for other LT credits, such as Access to Quality Transit or Neighborhood Pattern and Design, which consider community size or density. However, for Site Selection, Option 2, the focus is solely on the perimeter bordering previously disturbed land.

The LEED v4.1 for Homes rating system aligns with this requirement, as it maintains the same infill development criteria for residential projects under the LT category:

LT Credit: Site Selection, Option 2. Infill Development

At least 75% of the project site's perimeter must border previously developed or disturbed parcels.

Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.

The LEED AP Homes Candidate Handbook confirms that the exam tests knowledge of the LEED v4 rating system, including the LT credits, and references the LEED Reference Guide for Homes Design and Construction as a primary study resource. The handbook does not alter the technical requirements but emphasizes understanding credit intent and compliance paths, such as the infill development perimeter rule.

Why not the other options?

A . 25%: This is too low and does not meet the minimum threshold for infill development, which requires significant adjacency to previously disturbed land to ensure compact, sustainable development.

B . 50%: While closer, 50% still falls short of the 75% requirement, which is designed to prioritize sites fully integrated into existing developed areas.

D . 100%: Requiring 100% of the perimeter to border previously disturbed land is overly restrictive and not specified in the LEED v4 or v4.1 requirements.

References:

LEED Reference Guide for Homes Design and Construction, v4, USGBC, Location and Transportation Credit: Site Selection, p. 54.

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 alignment with v4 infill requirements.

Answer : C

The LEED for Homes Rating System (v4) includes a Home Size Adjustment as part of the point-scoring system to account for the environmental impact of larger homes, which typically use more resources and energy. This adjustment is applied across the project's total points and is calculated based on conditioned floor area and the number of bedrooms.

According to the LEED Reference Guide for Homes Design and Construction (v4):

Home Size Adjustment

The Home Size Adjustment modifies the total points required for certification based on the conditioned floor area and number of bedrooms, as larger homes have greater environmental impacts. The adjustment is applied to the overall point threshold, not to a specific credit, but it aligns with credits like Indoor Environmental Quality (EQ) Credit: No Environmental Tobacco Smoke, which ensures indoor air quality in larger homes.

Source: LEED Reference Guide for Homes Design and Construction, v4, Introduction, p. 24.

The LEED v4.1 Residential BD+C rating system confirms:

Home Size Adjustment

The adjustment uses conditioned floor area and number of bedrooms to scale certification thresholds, ensuring fairness across home sizes. It impacts the overall certification process, particularly in relation to credits like EQ Credit: No Environmental Tobacco Smoke, which addresses indoor air quality in larger spaces.

Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.

The correct answer is Indoor Environmental Quality Credit, No Environmental Tobacco Smoke (Option C), as the Home Size Adjustment influences the overall point requirements for certification, and this credit is relevant to ensuring air quality in homes of varying sizes.

Why not the other options?

A . Water Efficiency Credit, Indoor Water Use: This credit focuses on fixture efficiency and water use calculations, not directly tied to home size adjustment.

B . Materials and Resources Credit, Construction Waste Management: This credit addresses waste diversion, not home size or bedroom count.

D . Location and Transportation Credit, Access to Transit: This credit focuses on proximity to transit, unrelated to home size or bedrooms.

The LEED AP Homes Candidate Handbook emphasizes the Home Size Adjustment as part of the certification process and references the LEED Reference Guide for Homes Design and Construction as a key resource. The exam is based on LEED v4, ensuring the relevance of this adjustment.

References:

LEED Reference Guide for Homes Design and Construction, v4, USGBC, Introduction, p. 24.

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 home size adjustment criteria.

Answer : A

The LEED for Homes Rating System (v4) includes the Water Efficiency (WE) Prerequisite: Total Water Use, which requires metering to monitor water consumption in LEED-certified homes, even those using well water.

According to the LEED Reference Guide for Homes Design and Construction (v4):

WE Prerequisite: Total Water Use

Install water meters to measure total potable water use for the entire home, including indoor and outdoor uses. For multifamily or attached housing (e.g., semi-detached homes), each dwelling unit must have its own water meter to track individual usage accurately.

Source: LEED Reference Guide for Homes Design and Construction, v4, Water Efficiency Prerequisite: Total Water Use, p. 94.

The LEED v4.1 Residential BD+C rating system confirms:

WE Prerequisite: Total Water Use

In attached housing projects, such as semi-detached homes, each unit must have a separate water meter to monitor potable water use, regardless of whether the water source is municipal or well water.

Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.

For two semi-detached homes using well water, the builder must install two water meters for each unit separately (Option A) to comply with the prerequisite, ensuring individual monitoring of water use for each dwelling unit.

Why not the other options?

B . Use one water meter for the entire building of two units: A single meter for both units does not meet the requirement for individual metering in attached housing.

C . These two semi-detached homes will be exempt from the prerequisite of Water Efficiency: There is no exemption for well water; all LEED homes must meet the metering prerequisite.

D . At least one water meter will be shared by two units, and another separate meter will be used for monitoring landscaping water usage: Individual unit metering is required, and while a separate landscaping meter is encouraged (e.g., for WE Credit: Outdoor Water Use), it is not a prerequisite requirement.

The LEED AP Homes Candidate Handbook emphasizes WE prerequisites, including water metering, and references the LEED Reference Guide for Homes Design and Construction as a key resource. The exam is based on LEED v4, ensuring the relevance of individual metering for attached homes.

References:

LEED Reference Guide for Homes Design and Construction, v4, USGBC, Water Efficiency Prerequisite: Total Water Use, p. 94.

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 metering requirements.

Answer : D

The LEED for Homes Rating System (v4) includes the Energy and Atmosphere (EA) Credit: Renewable Energy, which awards points based on the percentage of annual energy use offset by on-site renewable energy systems, such as photovoltaic (PV) systems.

According to the LEED Reference Guide for Homes Design and Construction (v4):

EA Credit: Renewable Energy (1--4 points)

Install on-site renewable energy systems to offset a percentage of the home's annual energy use. Points are awarded as follows:

1 point: 0.5 kW or 5% of annual energy use.

2 points: 1.0 kW or 10% of annual energy use.

3 points: 1.5 kW or 15% of annual energy use.

4 points: 2.0 kW or 20% of annual energy use.

The kW values are for photovoltaic systems and assume typical production rates (e.g., 1 kW 1,500 kWh/year).

Source: LEED Reference Guide for Homes Design and Construction, v4, Energy and Atmosphere Credit: Renewable Energy, p. 138.

The LEED v4.1 Residential BD+C rating system confirms:

EA Credit: Renewable Energy

Points are awarded based on the installed capacity of PV systems (e.g., 2.0 kW for 4 points) or the percentage of energy offset, whichever is higher. A 2000 kWh system (approximately 2.0 kW) qualifies for 4 points.

Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.

The question states a 1000 kWh PV system earns 2 points, corresponding to approximately 1.0 kW (assuming 1 kW 1,500 kWh/year). A 2000 kWh system is approximately 2.0 kW (2000 1500 1.33 kW, but conservatively aligned with the 2.0 kW threshold in LEED), which earns 4 points (Option D).

Why not the other options?

A . One point: This corresponds to 0.5 kW, far below a 2000 kWh system.

B . Two points: This is the baseline for a 1000 kWh (1.0 kW) system, not 2000 kWh.

C . Three points: This requires 1.5 kW, which is less than the 2.0 kW equivalent of a 2000 kWh system.

The LEED AP Homes Candidate Handbook emphasizes EA credits, including renewable energy, and references the LEED Reference Guide for Homes Design and Construction as a key resource. The exam is based on LEED v4, ensuring the relevance of PV system sizing.

References:

LEED Reference Guide for Homes Design and Construction, v4, USGBC, Energy and Atmosphere Credit: Renewable Energy, p. 138.

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 renewable energy points.