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Exam Code LEED-AP-Homes
Exam Name LEED AP Homes (Residential) Exam
Vendor USGBC
Total Questions 100
Last Updated 26-Oct, 2026
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Free LEED-AP-Homes Practice Questions

Explore 5 free practice questions for the USGBC LEED-AP-Homes exam and review the answers and explanations to support your preparation.

  1. Question 1

    Single answer

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

    • Option A:
      Limiting branch line length
      Correct
    • Option B:
      Installing central manifold distribution
      Correct
    • Option C:
      Installing demand-controlled recirculation
      Correct
    • Option D:
      Insulating all domestic hot water piping to R-4
      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: A

    Explanation

    The LEED for Homes Rating System (v4) includes the Energy 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 Piping focuses on minimizing the length of hot water piping to reduce heat loss
    and delivery time.
    According to the LEED 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.
    The LEED v4.1 Residential BD+C rating 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?
    B . Installing central manifold distribution: This is part of Option 2: Central Manifold System in the
    LEED v4 credit, where a manifold distributes hot water to fixtures with short branch lines (e.g., 1/2-
    inch diameter pipes). It is a separate compliance path, not part of Option 1.
    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 of Option 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.
    The LEED AP Homes Candidate Handbook emphasizes EA credits, including hot water distribution,
    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 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.

  2. Question 2

    Single answer

    An existing home in a gut rehab LEED for Homes project reclaims all of the original framing. An
    addition is built with 90% FSC-certified wood. Which credit, if any, under Materials and Resources,
    will be earned?

    • Option A:
      Construction Waste Management
      Correct
    • Option B:
      No credit will be awarded
      Correct
    • Option C:
      Material-Efficient Framing
      Correct
    • Option D:
      Environmentally Preferable Products
      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: D

    Explanation

    The LEED for Homes Rating System (v4) includes several credits under the Materials and Resources
    (MR) category that encourage sustainable material use, including reclaimed materials and certified
    wood. The scenario describes a gut rehab project that reclaims all original framing and builds an
    addition with 90% FSC-certified wood. We need to determine which MR credit applies.
    According to the LEED Reference Guide for Homes Design and Construction (v4), the MR Credit:
    Environmentally Preferable Products rewards the use of materials that have environmentally
    beneficial attributes, such as reclaimed materials and FSC (Forest Stewardship Council)-certified
    wood:
    MR Credit: Environmentally Preferable Products (1–4 points)
    Use products that meet one or more of the following criteria for at least 25%, 50%, or 90% (by cost)
    of the total materials in the project:
    Reused or salvaged materials: Materials that are reclaimed from the same or another project.
    FSC-certified wood: Wood products certified by the Forest Stewardship Council for sustainable
    forestry practices.
    For gut rehab projects, reclaimed framing materials and FSC-certified wood in additions contribute to
    the percentage of environmentally preferable products.
    Source: LEED Reference Guide for Homes Design and Construction, v4, Materials and Resources
    Credit: Environmentally Preferable Products, p. 160.
    In this case:
    Reclaimed framing: The gut rehab reclaims 100% of the original framing, which qualifies as reused or
    salvaged materials under the credit.
    FSC-certified wood: The addition uses 90% FSC-certified wood, which also qualifies as an
    environmentally preferable product.
    The LEED v4.1 Residential BD+C rating system aligns with this approach:
    MR Credit: Environmentally Preferable Products
    Projects earn points by using products that are salvaged, recycled, or FSC-certified for at least 25%,
    50%, or 90% of the material cost. For renovations, salvaged framing and certified wood in additions
    are eligible.
    Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
    Since the project uses both reclaimed framing (100% of the original) and 90% FSC-certified wood in
    the addition, it meets the criteria for Environmentally Preferable Products, provided the combined
    material cost meets the 25%, 50%, or 90% thresholds. The high percentage of FSC-certified wood and
    full reclamation of framing make it likely to achieve at least one point.
    Why not the other options?
    A . Construction Waste Management: This credit focuses on diverting construction and demolition
    waste from landfills through recycling or reuse (e.g., 50% or 75% diversion rates). While reclaimed
    framing reduces waste, the credit is about waste management processes, not the use of reclaimed
    materials in the building.
    Reference: LEED Reference Guide for Homes Design and Construction, v4, MR Credit: Construction
    Waste Management, p. 164.
    B . No credit will be awarded: This is incorrect, as the use of reclaimed framing and FSC-certified
    wood directly contributes to the Environmentally Preferable Products credit.
    C . Material-Efficient Framing: This credit rewards practices that reduce framing material use, such as
    advanced framing techniques (e.g., 24-inch on-center stud spacing) or minimizing waste during
    design. Reclaiming framing or using FSC-certified wood does not address framing efficiency.
    Reference: LEED Reference Guide for Homes Design and Construction, v4, MR Credit: Material-
    Efficient Framing, p. 158.
    The LEED AP Homes Candidate Handbook confirms that the exam tests MR credits, including
    Environmentally Preferable Products, and references the LEED Reference Guide for Homes Design
    and Construction as a primary resource. The exam is based on LEED v4, ensuring the relevance of this
    credit.
    References:
    LEED Reference Guide for Homes Design and Construction, v4, USGBC, Materials and Resources
    Credit: Environmentally Preferable Products, p. 160.
    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 environmentally preferable
    product criteria.

  3. Question 3

    Single answer

    Energy losses due to supply duct leakage are most likely to occur when:

    • Option A:
      Interior wall cavities are used to conduct return air.
      Correct
    • Option B:
      Duct layout includes multiple 90-degree bends on a single branch.
      Correct
    • Option C:
      Ducts are located within conditioned envelope but joints are unsealed.
      Correct
    • Option D:
      Ducts are located in unconditioned attics, basements, or exterior walls.
      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: D

    Explanation

    Duct leakage in HVAC systems can significantly increase energy losses, particularly when ducts are
    poorly sealed or located in areas that exacerbate the impact of leakage. This issue is addressed in the
    LEED for Homes Rating System (v4) under the Energy and Atmosphere (EA) category, specifically in
    credits related to Heating and Cooling Distribution Systems.
    According to the LEED Reference Guide for Homes Design and Construction (v4), the location of ducts
    plays a critical role in energy losses due to leakage:
    EA Credit: Heating and Cooling Distribution Systems
    To minimize energy losses, locate all heating and cooling ducts and air handlers within the
    conditioned envelope of the building. Ducts located in unconditioned spaces, such as attics,
    basements, or exterior walls, are more likely to lose energy due to leakage, as air escaping from
    ducts in these areas is lost to the outside or unconditioned zones, increasing heating and cooling
    loads.
    Source: LEED Reference Guide for Homes Design and Construction, v4, Energy and Atmosphere
    Credit: Heating and Cooling Distribution Systems, p. 126.
    The LEED v4.1 Residential BD+C rating system further clarifies this:
    EA Credit: Optimize Energy Performance
    Ducts located in unconditioned spaces (e.g., attics, unconditioned basements, or exterior walls)
    contribute to significant energy losses when leakage occurs, as conditioned air escapes to areas
    outside the thermal envelope. Sealing ducts and locating them within conditioned spaces are best
    practices to minimize losses.
    Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
    Ducts in unconditioned attics, basements, or exterior walls are particularly problematic because any
    leakage results in conditioned air being lost to spaces that are not temperature-controlled, requiring
    the HVAC system to work harder to maintain indoor comfort. This scenario maximizes energy losses
    compared to ducts within the conditioned envelope.
    Why not the other options?
    A . Interior wall cavities are used to conduct return air: Using interior wall cavities for return air is not
    a best practice and may cause pressure imbalances or air quality issues, but it is less likely to cause
    significant energy losses due to supply duct leakage. Return air systems are typically within
    conditioned spaces, and the primary concern is airflow efficiency, not energy loss to unconditioned
    areas. Reference: LEED Reference Guide for Homes Design and Construction, v4, EA Credit: Heating
    and Cooling Distribution Systems, p. 127, which discusses return air strategies but not as a primary
    leakage concern. B . Duct layout includes multiple 90-degree bends on a single branch: Multiple 90-
    degree bends increase airflow resistance, reducing system efficiency, but they do not directly cause
    duct leakage. Leakage is related to unsealed joints or poor duct construction, not the geometry of the
    duct layout. Reference: LEED Reference Guide for Homes Design and Construction, v4, EA Credit:
    Heating and Cooling Distribution Systems, p. 126, which prioritizes duct sealing over layout. C . Ducts
    are located within conditioned envelope but joints are unsealed: While unsealed joints cause leakage,
    ducts within the conditioned envelope leak into spaces that are already temperature- controlled. This
    reduces the energy impact compared to leakage in unconditioned spaces, as the conditioned air
    remains within the thermal envelope. Reference: LEED Reference Guide for Homes Design and
    Construction, v4, EA Credit: Heating and Cooling Distribution Systems, p. 126, which notes that ducts
    in conditioned spaces minimize energy loss from leakage. The LEED AP Homes Candidate Handbook
    confirms that the exam tests knowledge of EA credits, including duct system design and energy
    performance, referencing the LEED Reference Guide for Homes Design and Construction as a primary
    resource. The handbook ensures that the exam is based on LEED v4, aligning with the focus on duct
    location and sealing. References: LEED Reference Guide for Homes Design and Construction, v4,
    USGBC, Energy and Atmosphere
    Credit: Heating and Cooling Distribution Systems, p. 126–127.
    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 duct location impacts.

  4. Question 4

    Single answer

    Envelope leakage is minimized by:

    • Option A:
      Installing a drainage plane.
      Correct
    • Option B:
      Conducting a blower door test.
      Correct
    • Option C:
      Installing a continuous air barrier.
      Correct
    • Option D:
      Specifying HERS Grade II Insulation.
      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: C

    Explanation

    Minimizing envelope leakage is a critical component of improving energy efficiency in homes, as it
    reduces unintended air infiltration and exfiltration through the building envelope. This concept is
    addressed in the LEED for Homes Rating System (v4) under the Energy and Atmosphere (EA)
    category, specifically in credits related to Air Infiltration and Building Envelope Performance.
    According to the LEED Reference Guide for Homes Design and Construction (v4), the primary method
    to minimize envelope leakage is to install a continuous air barrier:
    EA Prerequisite: Minimum Energy Performance
    To reduce air infiltration, projects must include a continuous air barrier system that is sealed at all
    penetrations, joints, and interfaces to prevent air leakage. The air barrier must be installed around
    the entire building envelope, including walls, roofs, and floors.
    Source: LEED Reference Guide for Homes Design and Construction, v4, Energy and Atmosphere
    Prerequisite: Minimum Energy Performance, p. 112.
    Additionally, the LEED v4.1 Residential BD+C rating system reinforces this requirement:
    EA Credit: Air Infiltration
    Install a continuous air barrier system to control air leakage through the building envelope. The air
    barrier must be airtight, durable, and continuous, with all seams, penetrations, and transitions
    sealed.
    Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
    A continuous air barrier is a system of materials (e.g., house wraps, sealed drywall, or spray foam)
    that forms a complete barrier to air movement, significantly reducing energy losses due to leakage.
    This is a proactive design and construction strategy to achieve energy efficiency goals.
    Why not the other options?
    A . Installing a drainage plane: A drainage plane (e.g., house wrap or rainscreen) is designed to
    manage water infiltration and protect the building from moisture damage, not to control air leakage.
    While it may contribute to overall building durability, it does not address envelope air tightness.
    Reference: LEED Reference Guide for Homes Design and Construction, v4, Sustainable Sites Credit:
    Rainwater Management, p. 76, which discusses drainage planes in the context of moisture control.
    B . Conducting a blower door test: A blower door test is a diagnostic tool used to measure air leakage
    in a building, not to minimize it. It quantifies the air tightness of the envelope (in air changes per
    hour, ACH) but does not physically reduce leakage. It is required for verification in LEED v4 (EA Credit:
    Air Infiltration) but is not a solution for minimizing leakage.
    Reference: LEED Reference Guide for Homes Design and Construction, v4, EA Credit: Air Infiltration,
    p. 124.
    D . Specifying HERS Grade II Insulation: HERS (Home Energy Rating System) insulation grades refer to
    the quality of insulation installation, with Grade II indicating moderate defects. While proper
    insulation reduces conductive heat loss, it does not directly address air leakage, which is managed by
    the air barrier system.
    Reference: LEED Reference Guide for Homes Design and Construction, v4, EA Credit: Insulation, p.
    120, which discusses HERS insulation grades but not air leakage.
    The LEED AP Homes Candidate Handbook emphasizes the importance of understanding EA credits,
    including air infiltration, for the exam, referencing the LEED Reference Guide for Homes Design and
    Construction as a key study resource. The handbook confirms that the exam is based on LEED v4,
    ensuring the relevance of the continuous air barrier requirement.
    References:
    LEED Reference Guide for Homes Design and Construction, v4, USGBC, Energy and Atmosphere
    Prerequisite: Minimum Energy Performance, p. 112, and EA Credit: Air Infiltration, p. 124.
    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).

  5. Question 5

    Single answer

    For a site in a town with a population of 10,000 to qualify under Location and Transportation Credit,
    Site Selection, Option 2: Infill Development, what portion of the site’s perimeter must border
    previously disturbed land?

    • Option A:
      25%
      Correct
    • Option B:
      50%
      Correct
    • Option C:
      75%
      Correct
    • Option D:
      100%
      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: C

    Explanation

    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.