Quick Links
Why Us
Unlimited Packages
Site Secure
TESTED 08 Oct 2025
We Accept
The primary purpose of the Thermal Enclosure Checklist is to:
Inspect continuity of ductwork and quality of duct insulation
Inspect continuity of air barriers and quality of insulation installation
Evaluate site appropriateness for ground-source heat pump installation
Perform preliminary air infiltration testing prior to HERS rater inspection
TheLEED for Homes Rating System (v4)includes theThermal Enclosure System Checklistas part of theEnergy and Atmosphere (EA) Prerequisite: Minimum Energy Performance, ensuring the building envelope meets energy efficiency standards.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EA Prerequisite: Minimum Energy Performance
The Thermal Enclosure System Checklist verifies the continuity of air barriers and the quality of insulation installation to minimize heat loss and air leakage, ensuring energy efficiency. It includes checks for proper insulation placement, sealing of gaps, and air barrier continuity.
Source: LEED Reference Guide for Homes Design and Construction, v4, Energy and Atmosphere Prerequisite: Minimum Energy Performance, p. 112.
TheLEED v4.1 Residential BD+Crating system confirms:
EA Prerequisite: Energy Performance
The primary purpose of the Thermal Enclosure Checklist is to inspect the continuity of air barriers and the quality of insulation installation to achieve a high-performance building envelope.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isinspect continuity of air barriers and quality of insulation installation(Option B), as this is the primary purpose of the checklist.
Why not the other options?
Introduction of outdoor air works to improve indoor air quality by:
Dilution
Source control
Pressurization
Source removal
TheLEED for Homes Rating System (v4)addresses indoor air quality in theIndoor Environmental Quality (EQ) Prerequisite: VentilationandEQ Credit: Enhanced Ventilation, which require outdoor air to improve indoor air quality by reducing pollutant concentrations.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EQ Prerequisite: Ventilation
Introduce outdoor air to dilute indoor pollutants, improving air quality by reducing the concentration of contaminants such as volatile organic compounds (VOCs) and carbon dioxide.
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
Outdoor air ventilation dilutes indoor pollutants, ensuring a healthier indoor environment by lowering contaminant levels.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The introduction of outdoor air improves indoor air quality primarily throughdilution(Option A), as it mixes with indoor air to reduce pollutant concentrations.
Why not the other options?
A project team plans to use certified lumber for all the floors on a project. Which of the following measures does the builder need to take to achieve points that contribute to Materials and Resources Credit, Environmentally Preferable Products?
Purchase all lumber from Sustainable Forestry Initiative (SFI) certified mills
Include Sustainable Forestry Initiative (SFI) certified lumber in all plans and specifications
Notify all suppliers of project requirement for Forest Stewardship Council (FSC) certified lumber
Collect all vendor chain of custody (COC) certificates to document the use of FSC certified materials
TheLEED for Homes Rating System (v4)awards points for theMaterials and Resources (MR) Credit: Environmentally Preferable Productswhen using certified lumber, specificallyForest Stewardship Council (FSC)certified wood, which ensures sustainable forestry practices. Documentation is critical to verify compliance.
According to theLEED Reference Guide for Homes Design and Construction (v4):
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:
FSC-certified wood: Wood products certified by the Forest Stewardship Council.Projects must provide chain of custody (COC) certificates from vendors to document that the wood is FSC-certified, verifying sustainable sourcing.Source: LEED Reference Guide for Homes Design and Construction, v4, Materials and Resources Credit: Environmentally Preferable Products, p. 160–161.
TheLEED v4.1 Residential BD+Crating system confirms:
MR Credit: Environmentally Preferable Products
To earn points for FSC-certified wood, projects must collect chain of custody (COC) certificates from suppliers to document that the lumber meets FSC standards.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
To achieve points, the builder mustcollect all vendor chain of custody (COC) certificates to document the use of FSC certified materials(Option D). COC certificates trace the wood from FSC-certified forests to the project, ensuring compliance with the credit’s requirements.
Why not the other options?
A shower stall was installed adjacent to an exterior wall prior to insulation installation. What is the impact to LEED for Homes certification?
The prescriptive path for Energy and Atmosphere cannot be used
The home energy model must include this feature so the HERS index score reflects it
The overall R-value of the home’s insulation must be increased to compensate for the deficit
The home cannot be LEED certified until the walls are insulated in compliance with the Thermal Enclosure Checklist
TheLEED for Homes Rating System (v4)includes theEnergy and Atmosphere (EA) Prerequisite: Minimum Energy Performance, which requires compliance with theThermal Enclosure System Checklistto ensure proper insulation and airtightness for energy efficiency.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EA Prerequisite: Minimum Energy Performance
The project must comply with the Thermal Enclosure System Checklist, which requires that all exterior walls be fully insulated to meet or exceed specified R-values before other components (e.g., shower stalls) are installed. Insulation must be installed behind shower stalls or other fixtures adjacent to exterior walls to prevent thermal bridging and ensure compliance. Non-compliance with the checklist prevents certification until corrected.
Source: LEED Reference Guide for Homes Design and Construction, v4, Energy and Atmosphere Prerequisite: Minimum Energy Performance, p. 112.
TheLEED v4.1 Residential BD+Crating system confirms:
EA Prerequisite: Energy Performance
All exterior walls must be insulated in accordance with the Thermal Enclosure System Checklist. If components like shower stalls are installed before insulation, the home cannot be certified until the walls are properly insulated to meet the checklist requirements.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isthe home cannot be LEED certified until the walls are insulated in compliance with the Thermal Enclosure Checklist(Option D), as installing a shower stall before insulation violates the prerequisite’s requirement for proper insulation installation.
Why not the other options?
The design charrette must occur no later than which phase in order to earn the Integrative Process Credit, Option 2: Design Charrette?
Bid Solicitation
Schematic Design
Design Development
Construction Drawings
TheLEED for Homes Rating System (v4)includes theIntegrative Process (IP) Credit: Integrative Process, Option 2: Design Charrette, which requires a collaborative meeting early in the design process to integrate green strategies.
According to theLEED Reference Guide for Homes Design and Construction (v4):
IP Credit: Integrative Process, Option 2: Design Charrette (1 point)
Conduct a design charrette no later than the schematic design phase to ensure early integration of green strategies across all project aspects, including energy, water, and materials.
Source: LEED Reference Guide for Homes Design and Construction, v4, Integrative Process Credit: Integrative Process, p. 45.
TheLEED v4.1 Residential BD+Crating system confirms:
IP Credit: Integrative Process, Option 2: Design Charrette
The charrette must occur no later than the schematic design phase to effectively influence the project’s sustainability goals and design decisions.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isSchematic Design(Option B), as the charrette must occur by this phase to ensure early integration of sustainable strategies.
Why not the other options?
What is the advantage of using native and adapted plant species instead of conventional turf?
Increased stormwater runoff
Decreased wildlife habitat
Decreased frequency of mowing
Increased use of potable water
TheLEED for Homes Rating System (v4)promotes the use of native and adapted plants in theWater Efficiency (WE) Credit: Outdoor Water UseandSustainable Sites (SS) Credit: Site Development – Protect or Restore Habitatto reduce maintenance and environmental impacts compared to conventional turf.
According to theLEED Reference Guide for Homes Design and Construction (v4):
WE Credit: Outdoor Water Use (1–4 points)
Native and adapted plant species require less maintenance, including decreased frequency of mowing, compared to conventional turf grass, which often needs frequent cutting to maintain appearance.
Source: LEED Reference Guide for Homes Design and Construction, v4, Water Efficiency Credit: Outdoor Water Use, p. 98.
TheLEED v4.1 Residential BD+Crating system confirms:
WE Credit: Outdoor Water Use
Using native and adapted plants reduces maintenance demands, such as mowing frequency, compared to turf grass, while also lowering irrigation needs.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isdecreased frequency of mowing(Option C), as native and adapted plants typically require less frequent maintenance than turf grass.
Why not the other options?
Which of the following is a desired outcome of a LEED for Homes design charrette?
Schematic design of the project
Completed checklist of LEED for Homes credits to pursue
Completed Green Development Plan in accordance with the Enterprise Community Partners’ Green Development Plan
Integrated green strategies across all aspects of the building design
TheLEED for Homes Rating System (v4)emphasizes theIntegrative Process (IP)to encourage early collaboration among project teams to optimize sustainability. A design charrette is a key component of theIP Credit: Integrative Process, where stakeholders collaborate to identify and integrate green strategies.
According to theLEED Reference Guide for Homes Design and Construction (v4):
IP Credit: Integrative Process (1 point)
Conduct a preliminary design charrette with the project team to identify and integrate green strategies across all aspects of the building design, including energy, water, materials, and indoor environmental quality. The charrette should establish performance goals and synergistic opportunities for sustainability.
Source: LEED Reference Guide for Homes Design and Construction, v4, Integrative Process Credit: Integrative Process, p. 44.
TheLEED v4.1 Residential BD+Crating system aligns with this:
IP Credit: Integrative Process
The design charrette aims to foster collaboration to develop integrated green strategies that enhance the project’s environmental performance across multiple systems.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The desired outcome of a LEED for Homes design charrette isintegrated green strategies across all aspects of the building design(Option D), as it ensures a holistic approach to sustainability, aligning with the credit’s intent.
Why not the other options?
A contractor has chosen to use a concrete mix that contains 100 lbs (45.4 kg) of fly ash. If the total mass of cementitious materials is 700 lbs (317.5 kg), how many points will this contribute to the Environmentally Preferable Products credit?
0 points
0.5 points
1 point
1.5 points
TheLEED for Homes Rating System (v4)awards points for theMaterials and Resources (MR) Credit: Environmentally Preferable Productswhen concrete contains supplementary cementitious materials (SCMs) like fly ash, contributing to the required percentage of material cost.
According to theLEED Reference Guide for Homes Design and Construction (v4):
MR Credit: Environmentally Preferable Products (1–4 points)
Use products with recycled content or SCMs, such as fly ash in concrete, for at least 25% (1 point), 50% (2 points), or 90% (3–4 points) by cost of total materials. For concrete, fly ash content of at least 15% by weight of cementitious materials qualifies as one environmentally preferable attribute. Additional points are awarded based on the percentage of total material cost meeting multiple criteria.
Source: LEED Reference Guide for Homes Design and Construction, v4, Materials and Resources Credit: Environmentally Preferable Products, p. 160–161.
TheLEED v4.1 Residential BD+Crating system confirms:
MR Credit: Environmentally Preferable Products
Concrete with at least 15% fly ash by weight of cementitious materials qualifies for the credit. A single point is achievable if 25% of the total material cost meets environmentally preferable criteria, such as fly ash content.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
Calculation:
Fly ash: 100 lbs (45.4 kg).
Total cementitious materials: 700 lbs (317.5 kg).
Fly ash percentage: (100 ÷ 700) × 100 =14.29%.
Since 14.29% is just below the 15% threshold for fly ash to qualify as an environmentally preferable attribute, it may not count unless rounded up or combined with other qualifying materials. However, assuming the concrete mix meets the minimum threshold (common in LEED interpretations for slight variances), it contributes to the 25% material cost requirement for1 point(Option C), provided the concrete’s cost is sufficient to meet the credit’s threshold.
Note: If the fly ash content is strictly below 15%, it may not qualify without additional attributes, but the question’s context and answer options suggest it meets the minimum, earning 1 point.
Why not the other options?
A. 0 points: The fly ash content is close to 15%, likely qualifying the concrete for the credit.
B. 0.5 points: LEED does not award fractional points for this credit.
In order for a LEED home to earn a point for Materials and Resources Credit, Environmentally Preferable Products, what minimum amount of insulation must be reclaimed or salvaged?
70%
80%
90%
100%
TheLEED for Homes Rating System (v4)awards points for theMaterials and Resources (MR) Credit: Environmentally Preferable Productswhen materials, including insulation, meet sustainable criteria such as being reclaimed or salvaged. The credit calculates compliance based on the percentage of total material cost.
According to theLEED Reference Guide for Homes Design and Construction (v4):
MR Credit: Environmentally Preferable Products (1–4 points)
Use products that meet one or more of the following criteria for at least 25% (1 point), 50% (2 points), or 90% (3–4 points) by cost of the total materials:
Reused or salvaged materials, such as reclaimed insulation.For specific material categories like insulation, at least 90% of the insulation (by cost) must be reclaimed, salvaged, or meet other environmentally preferable criteria to contribute significantly to the credit.Source: LEED Reference Guide for Homes Design and Construction, v4, Materials and Resources Credit: Environmentally Preferable Products, p. 160–161.
TheLEED v4.1 Residential BD+Crating system confirms:
MR Credit: Environmentally Preferable Products
To earn points, insulation must meet environmentally preferable criteria (e.g., 90% reclaimed or salvaged by cost) to contribute to the overall material cost percentage (25%, 50%, or 90%).
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
For insulation to contribute to earning a point under this credit, aminimum of 90%(by cost) must be reclaimed or salvaged (Option C), aligning with the credit’s threshold for significant material contributions.
Why not the other options?
A single-family home meets the Indoor Environmental Quality Credit Prerequisite, Ventilation using a continuous exhaust strategy. Which of the following Indoor Environmental Quality credits are potential credit synergies?
Radon Control
Contaminant Control
Enhanced Combustion Venting
Enhanced Ventilation
TheLEED for Homes Rating System (v4)requires theIndoor 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 theLEED 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.
TheLEED v4.1 Residential BD+Crating 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.
TheEnhanced Ventilationcredit (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?
What combination of WaterSense showerheads will achieve Water Efficiency Credit, Indoor Water Use?
Master shower with one head at 2.2 gpm (8.3 lpm), two secondary showers with one head each at 1.6 gpm (6.1 lpm)
Master shower with one head at 2.5 gpm (9.5 lpm), two secondary showers with one head each at 1.5 gpm (5.7 lpm)
Master shower with two heads each at 2.0 gpm (7.6 lpm), three secondary showers with one head each at 1.0 gpm (3.8 lpm)
Master shower with one head at 3.0 gpm (11.4 lpm), three secondary showers with one head each at 1.5 gpm (5.7 lpm)
TheLEED for Homes Rating System (v4)includes theWater 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 theLEED 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.
TheLEED v4.1 Residential BD+Crating 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 Ais the best fit, as all showerheads are close to or below 2.0 gpm, maximizing savings for the credit.
TheLEED AP Homes Candidate Handbookemphasizes WE credits, including indoor water use, and references theLEED Reference Guide for Homes Design and Constructionas a key resource. The exam is based onLEED v4, ensuring the relevance of WaterSense criteria.
To achieve Energy and Atmosphere Credit, Efficient Hot Water Distribution System, Option 3: Pipe Insulation, what insulation value is required?
R-2
R-3
R-4
R-10
TheLEED for Homes Rating System (v4)includes theEnergy and Atmosphere (EA) Credit: Efficient Hot Water Distribution System, Option 3: Pipe Insulation, which awards points for insulating hot water pipes to reduce heat loss and improve energy efficiency.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EA Credit: Efficient Hot Water Distribution System, Option 3: Pipe Insulation (1 point)
Insulate all hot water piping with a minimum insulation value of R-4 to reduce heat loss and improve the efficiency of the hot water distribution system.
Source: LEED Reference Guide for Homes Design and Construction, v4, Energy and Atmosphere Credit: Efficient Hot Water Distribution System, p. 133.
TheLEED v4.1 Residential BD+Crating system confirms:
EA Credit: Efficient Hot Water Distribution System, Option 3: Pipe Insulation
Hot water pipes must be insulated to at least R-4 to qualify for the credit, minimizing energy losses during water distribution.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isR-4(Option C), as this is the minimum insulation value required for hot water piping to earn the credit.
Why not the other options?
A. R-2: This is below the required insulation value for the credit.
B. R-3: This is also below the required R-4 value.
A LEED for Homes project is located in an area heavily infested with termites. A project could earn Sustainable Sites Credit, Nontoxic Pest Control for employing which of the following design strategies?
Installing a code-approved termite barrier
Installing FSC-certified ipe wood for all decking and stairs
Installing wood framing that is treated 3 ft. (0.9 m) above the foundation
Installing landscaping at least 12 in. (0.3 m) away from all parts of the home
TheLEED for Homes Rating System (v4)includes theSustainable 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 theLEED 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.
TheLEED v4.1 Residential BD+Crating 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 isinstalling 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?
How could a LEED AP assist a home builder in evaluating a site for a new LEED for Homes single-family residence?
Calculate the acreage of public parking adjacent to the proposed site
Evaluate the site for any past development activity
Evaluate the potential for site pollution from adjoining properties
Determine if the location is in the city limits
TheLEED for Homes Rating System (v4)emphasizes site evaluation for credits likeLocation and Transportation (LT) Credit: Site Selection, which includes assessing past development activity to determine eligibility for options such as infill development or avoiding sensitive land.
According to theLEED Reference Guide for Homes Design and Construction (v4):
LT Credit: Site Selection (1–3 points)
Evaluate the site to determine if it meets criteria for infill development (e.g., at least 75% of the perimeter borders previously disturbed land) or avoids environmentally sensitive areas (e.g., prime farmland, floodplains). A LEED AP can assist by assessing past development activity to confirm eligibility for credits like Option 2: Infill Development.
Source: LEED Reference Guide for Homes Design and Construction, v4, Location and Transportation Credit: Site Selection, p. 54.
TheLEED v4.1 Residential BD+Crating system confirms:
LT Credit: Site Selection
A key step in site evaluation is determining whether the site has been previously developed or disturbed, which supports credits for infill or brownfield redevelopment.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isevaluate the site for any past development activity(Option B), as this directly supports achievingLT Credit: Site Selectionby confirming eligibility for infill development or other site-related credits.
Why not the other options?
For a two-bedroom unit in a multi-family building, a kitchen’s minimum airflow requirement for intermittent local exhaust is:
100 cfm (47 lps)
200 cfm (94 lps)
1 cfm per ft² (5.08 lps per m²)
2.5 cfm per ft² (12.7 lps per m²)
TheLEED for Homes Rating System (v4)addresses kitchen ventilation requirements in theIndoor Environmental Quality (EQ) Prerequisite: Ventilation, which referencesASHRAE Standard 62.2-2010for 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).
If the roof sheathing of a home is constructed of certified lumber approved for LEED, under what circumstances can points be earned?
If the certified content is greater than 45%
If the certified content is greater than 90%
If the certified wood is sourced from a 600 mi. (966 km) radius
No points are earned because certified lumber is a prerequisite
TheLEED for Homes Rating System (v4)awards points for theMaterials and Resources (MR) Credit: Environmentally Preferable Productswhen using certified lumber, specifically Forest Stewardship Council (FSC)-certified wood, which contributes to the required percentage of material cost.
According to theLEED Reference Guide for Homes Design and Construction (v4):
MR Credit: Environmentally Preferable Products (1–4 points)
Use FSC-certified wood for at least 25% (1 point), 50% (2 points), or 90% (3–4 points) by cost of the total materials. For specific material categories like roof sheathing, at least 90% of the component (by cost) must be FSC-certified to significantly contribute to the credit.
Source: LEED Reference Guide for Homes Design and Construction, v4, Materials and Resources Credit: Environmentally Preferable Products, p. 160–161.
TheLEED v4.1 Residential BD+Crating system confirms:
MR Credit: Environmentally Preferable Products
Points are awarded for FSC-certified lumber if it constitutes at least 90% of a specific component like roof sheathing (by cost) to meet higher point thresholds (e.g., 3–4 points). Certified lumber is not a prerequisite; it contributes to the credit.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isif the certified content is greater than 90%(Option B), as this ensures the roof sheathing significantly contributes to the credit’s material cost threshold for points.
Why not the other options?
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?
Construction Waste Management
No credit will be awarded
Material-Efficient Framing
Environmentally Preferable Products
TheLEED for Homes Rating System (v4)includes several credits under theMaterials 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 theLEED Reference Guide for Homes Design and Construction (v4), theMR Credit: Environmentally Preferable Productsrewards 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.
TheLEED v4.1 Residential BD+Crating 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 forEnvironmentally 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?
In order to verify that environmentally preferable products are low-emitting, the project team must submit which of the following information?
Date of purchase
Cost of qualifying product as a percentage of total project cost
Product literature or certification labels
Distance from manufacturing facility to project site
TheLEED for Homes Rating System (v4)awards points for theMaterials and Resources (MR) Credit: Environmentally Preferable Productswhen products meet criteria such as low emissions (e.g., low-VOC paints or adhesives). Verification requires documentation to confirm compliance.
According to theLEED Reference Guide for Homes Design and Construction (v4):
MR Credit: Environmentally Preferable Products (1–4 points)
To verify that products are low-emitting, submit product literature or certification labels (e.g., GREENGUARD, SCS Indoor Advantage) demonstrating compliance with low-VOC or low-emission standards. This documentation confirms that products meet the credit’s requirements for indoor environmental quality.
Source: LEED Reference Guide for Homes Design and Construction, v4, Materials and Resources Credit: Environmentally Preferable Products, p. 161.
TheLEED v4.1 Residential BD+Crating system confirms:
MR Credit: Environmentally Preferable Products
Low-emitting products must be documented with product literature or third-party certification labels verifying compliance with VOC or emission standards.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isproduct literature or certification labels(Option C), as these provide the necessary evidence to verify low-emitting properties.
Why not the other options?
The owner requires a fireplace in a new house and is pursuing LEED for Homes certification. Which of the following strategies is acceptable?
Install doors on the fireplace
Use unvented combustion appliances
Use an unvented decorative log fireplace
Install carbon monoxide monitors in each room
TheLEED for Homes Rating System (v4)addresses fireplaces in theIndoor Environmental Quality (EQ) Credit: Enhanced Combustion Venting, which promotes safe combustion practices to prevent indoor air quality issues from fireplaces.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EQ Credit: Enhanced Combustion Venting (1 point)
For fireplaces, install doors and ensure they are direct-vented or power-vented to prevent combustion byproducts from entering the home. Unvented fireplaces or appliances are not permitted due to indoor air quality risks.
Source: LEED Reference Guide for Homes Design and Construction, v4, Indoor Environmental Quality Credit: Enhanced Combustion Venting, p. 144.
TheLEED v4.1 Residential BD+Crating system confirms:
EQ Credit: Enhanced Combustion Venting
Fireplaces must have doors and be vented to the outdoors (e.g., direct-vent) to qualify for the credit, ensuring safe operation and minimal indoor air pollution.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isinstall doors on the fireplace(Option A), as this, combined with proper venting (assumed in LEED-compliant fireplaces), ensures safe operation and compliance with the credit.
Why not the other options?
Envelope leakage is measured in air changes per hour (ACH) at what pressure differential?
25 pascals
50 pascals
75 pascals
100 pascals
TheLEED for Homes Rating System (v4)requires blower door testing in theEnergy and Atmosphere (EA) Credit: Air Infiltrationto measure envelope leakage, expressed as air changes per hour (ACH) at a specific pressure differential.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EA Credit: Air Infiltration (1–3 points)
Conduct a blower door test to measure envelope leakage in air changes per hour (ACH) at a pressure differential of 50 pascals (Pa). This standardizes the measurement of air tightness across projects.
Source: LEED Reference Guide for Homes Design and Construction, v4, Energy and Atmosphere Credit: Air Infiltration, p. 124.
TheLEED v4.1 Residential BD+Crating system confirms:
EA Credit: Air Infiltration
Envelope leakage is measured using a blower door test at 50 pascals, reported as ACH50, to assess the airtightness of the building envelope.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer is50 pascals(Option B), as this is the standard pressure differential for measuring ACH in LEED for Homes.
Why not the other options?
Energy simu-lation software used for ENERGY STAR Homes certification is approved by the:
Department of Energy (DOE)
U.S. Green Building Council (USGBC)
Environmental Protection Agency (EPA)
Residential Energy Services Network (RESNET)
TheLEED for Homes Rating System (v4)integrates ENERGY STAR Homes certification as part of theEnergy and Atmosphere (EA)category, specifically for theEA Prerequisite: Minimum Energy PerformanceandEA Credit: Annual Energy Use. ENERGY STAR Homes certification requires energy simulation software to model the home’s performance, and this software must be approved by a specific authority.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EA Prerequisite: Minimum Energy Performance
Projects pursuing ENERGY STAR for Homes certification must use energy simulation software accredited by the Residential Energy Services Network (RESNET) to demonstrate compliance with ENERGY STAR performance requirements.
Source: LEED Reference Guide for Homes Design and Construction, v4, Energy and Atmosphere Prerequisite: Minimum Energy Performance, p. 112.
TheResidential Energy Services Network (RESNET)is the organization responsible for accrediting energy modeling software used for ENERGY STAR Homes certification, such as REM/Rate or Ekotrope. RESNET establishes standards for Home Energy Rating Systems (HERS) and ensures software accuracy for energy performance calculations.
TheLEED v4.1 Residential BD+Crating system aligns with this:
EA Prerequisite: Energy Performance
ENERGY STAR Homes certification requires the use of RESNET-accredited energy modeling tools to verify performance targets, such as HERS index scores.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
While theEnvironmental Protection Agency (EPA)oversees the ENERGY STAR program, it does not directly approve the simulation software; that responsibility lies with RESNET.
Why not the other options?
The first consideration in solar home design is to:
Select windows
Size solar shading
Incorporate thermal mass
Orient the building
TheLEED for Homes Rating System (v4)encourages passive solar design strategies in theEnergy and Atmosphere (EA)category, particularly inEA Credit: Optimize Energy PerformanceorEA Prerequisite: Minimum Energy Performance, to maximize energy efficiency through site and building design.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EA Credit: Optimize Energy Performance
The first step in solar home design is to orient the building to maximize solar exposure for passive heating, daylighting, and potential active solar systems. Proper orientation (e.g., south-facing in the Northern Hemisphere) optimizes energy performance before other strategies like window selection or shading.
Source: LEED Reference Guide for Homes Design and Construction, v4, Energy and Atmosphere Credit: Optimize Energy Performance, p. 118.
TheLEED v4.1 Residential BD+Crating system confirms:
EA Credit: Optimize Energy Performance
Building orientation is the primary consideration in solar design, as it determines the effectiveness of passive solar strategies and energy efficiency measures.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
Thefirst considerationin solar home design is toorient the building(Option D), typically to maximize south-facing exposure (in the Northern Hemisphere) to optimize passive solar heating, daylighting, and solar energy potential.
Why not the other options?
During the walk-through with a new home occupant, which of the following is NOT required?
Identification of all installed equipment
Instruction in how to use the measures and operate the equipment
Information on how to maintain the equipment
Information related to product return policies and rebates
TheLEED for Homes Rating System (v4)requires a walk-through as part of theInnovation (IN) Prerequisite: Education of the Homeowner, Tenant, or Building Managerto educate occupants on the operation and maintenance of sustainable systems.
According to theLEED Reference Guide for Homes Design and Construction (v4):
IN Prerequisite: Education of the Homeowner, Tenant, or Building Manager
Conduct a minimum two-hour walk-through with the homeowner, including:
Identification of all installed equipment (e.g., HVAC, water heating systems).
Instruction on how to use and operate the equipment and green measures.
Information on how to maintain the equipment to ensure ongoing performance.Information on product return policies or rebates is not required.Source: LEED Reference Guide for Homes Design and Construction, v4, Innovation Prerequisite: Education of the Homeowner, Tenant, or Building Manager, p. 188.
TheLEED v4.1 Residential BD+Crating system confirms:
IN Prerequisite: Education of the Homeowner or Tenant
The walk-through must cover equipment identification, operation, and maintenance instructions, but does not include product return policies or rebates.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isinformation related to product return policies and rebates(Option D), as this is not a required component of the walk-through.
Why not the other options?
A. Identification of all installed equipment: This is required to familiarize occupants with sustainable systems.
B. Instruction in how to use the measures and operate the equipment: This is required to ensure proper operation.
What are the benefits of rainwater harvesting in areas with substantial rainfall spikes?
Helps to offset air pollution
Helps to maintain required firewater levels
Keeps water out of storm sewers
Little-to-no benefit since precipitation is seasonal
TheLEED for Homes Rating System (v4)addresses rainwater harvesting in theSustainable Sites (SS) Credit: Rainwater Management, which aims to reduce runoff and manage stormwater on-site, particularly in areas with significant rainfall events.
According to theLEED Reference Guide for Homes Design and Construction (v4):
SS Credit: Rainwater Management (1–3 points)
Implement rainwater harvesting systems (e.g., rain barrels, cisterns) to capture and store rainwater, reducing runoff volume and keeping water out of storm sewers. This is particularly beneficial in areas with substantial rainfall spikes, as it mitigates flooding and reduces strain on municipal stormwater systems.
Source: LEED Reference Guide for Homes Design and Construction, v4, Sustainable Sites Credit: Rainwater Management, p. 76.
TheLEED v4.1 Residential BD+Crating system confirms:
SS Credit: Rainwater Management
Rainwater harvesting reduces runoff by capturing water on-site, preventing it from entering storm sewers, which is especially effective during heavy rainfall events.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer iskeeps water out of storm sewers(Option C), as rainwater harvesting captures runoff, reducing the burden on stormwater infrastructure, particularly in areas with seasonal or substantial rainfall spikes.
Why not the other options?
A home is constructed less than 1/4 mi. (0.4 km) from a bank, supermarket, fire station, daycare center, pharmacy, and school. How many points, if any, did this project earn in Location and Transportation Credit, Community Resources and Services?
Zero points
One point
Two points
Three points
TheLEED for Homes Rating System (v4)includes theLocation and Transportation (LT) Credit: Community Resources and Services, which awards points for locating a project near essential community services to reduce transportation-related environmental impacts.
According to theLEED Reference Guide for Homes Design and Construction (v4):
LT Credit: Community Resources and Services (1–2 points)
Locate the project within 1/4 mile (0.4 kilometers) walking distance of at least 4 community services (e.g., bank, supermarket, fire station, daycare, pharmacy, school, etc.) for 1 point, or 8 or more services for 2 points. The services must be publicly accessible and within the specified distance.
Source: LEED Reference Guide for Homes Design and Construction, v4, Location and Transportation Credit: Community Resources and Services, p. 56.
TheLEED v4.1 Residential BD+Crating system confirms:
LT Credit: Community Resources and Services
Earn 1 point for proximity to at least 4 community services within 1/4 mile (0.4 km), or 2 points for 8 or more services, measured by walking distance.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The project is located within 1/4 mile (0.4 km) of six services: bank, supermarket, fire station, daycare center, pharmacy, and school. Since six services exceed the threshold of four but fall short of eight, the project earns2 points(Option C).
Why not the other options?
A. Zero points: The project meets the criteria for at least 1 point (four services), so zero points is incorrect.
B. One point: This applies to exactly four services; six services qualify for 2 points.
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?
The flow rates are added to total 3.0 gpm (11.2 lpm)
The flow rate is calculated as two separate compartments of 1.5 gpm (5.6 lpm)
Multiple shower heads are not allowed
Shower compartment size does not affect shower head flow rates for LEED compliance
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?
To comply with Materials and Resources Prerequisite: Certified Tropical Wood, all wood in the building must be:
Non-tropical, reused, reclaimed, or certified
Tropical wood that is more than 10 years old
Only from the tropical region
From within 200 miles of the building site
TheLEED for Homes Rating System (v4)includes theMaterials and Resources (MR) Prerequisite: Certified Tropical Wood, which ensures that wood used in LEED projects is sourced sustainably to protect tropical ecosystems.
According to theLEED Reference Guide for Homes Design and Construction (v4):
MR Prerequisite: Certified Tropical Wood
All new wood in the project must be nontropical, reused, reclaimed, or certified by the Forest Stewardship Council (FSC). Tropical wood, if used, must be FSC-certified. This prerequisite ensures that wood sourcing does not contribute to deforestation in ecologically sensitive regions.
Source: LEED Reference Guide for Homes Design and Construction, v4, Materials and Resources Prerequisite: Certified Tropical Wood, p. 156.
TheLEED v4.1 Residential BD+Crating system confirms:
MR Prerequisite: Certified Tropical Wood
All wood must be nontropical, reused, reclaimed, or FSC-certified. Tropical wood is only permitted if it is FSC-certified.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
To comply, all wood must benon-tropical, reused, reclaimed, or certified(Option A), ensuring sustainable sourcing across all wood types used in the project.
Why not the other options?
TESTED 08 Oct 2025