An effective design strategy to reduce outdoor water consumption is using:
Only drip irrigation on impermeable surfaces
ENERGY STAR-certified irrigation equipment
Sprinkler systems with minimum reach of 10 ft. (3 m)
Native and adapted plants
TheLEED for Homes Rating System (v4)addresses outdoor water use in theWater Efficiency (WE) Credit: Outdoor Water Use, which promotes strategies to reduce irrigation needs, particularly through plant selection.
According to theLEED Reference Guide for Homes Design and Construction (v4):
WE Credit: Outdoor Water Use (1–4 points)
Use native or adapted plants with low water requirements to reduce outdoor water consumption. These plants are suited to the local climate and require less irrigation compared to conventional turf or non-native species.
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
Selecting native and adapted plants is an effective strategy to minimize irrigation needs, contributing to points by reducing outdoor water consumption.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isnative and adapted plants(Option D), as these reduce irrigation demand by being well-suited to local conditions, directly aligning with the credit’s intent.
Why not the other options?
A proposed 1000 kWh photovoltaic system will achieve two points in the Energy and Atmosphere, Renewable Energy credit. If the client chooses a 2000 kWh system instead, how many points will be achieved?
One point
Two points
Three points
Four points
TheLEED for Homes Rating System (v4)includes theEnergy 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 theLEED 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.
TheLEED v4.1 Residential BD+Crating 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 earns4 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.
What is the purpose of Regional Priority Credits under the LEED for Homes v4 Rating System?
To provide additional points to projects depending on the building type
To equalize credit requirements in all locations
To identify difficult credit requirements, based on location
To enhance the ability of LEED project teams to address critical environmental issues for the project’s location
TheLEED for Homes Rating System (v4)includesRegional Priority (RP) Creditsto incentivize projects to address environmental issues that are particularly critical in their specific geographic region.
According to theLEED Reference Guide for Homes Design and Construction (v4):
Regional Priority Credits (1–4 points)
The purpose of Regional Priority Credits is to enhance the ability of LEED project teams to address critical environmental issues specific to the project’s location, such as water scarcity or habitat restoration, by providing bonus points for achieving designated credits that align with regional priorities.
Source: LEED Reference Guide for Homes Design and Construction, v4, Regional Priority Credits, p. 190.
TheLEED v4.1 Residential BD+Crating system confirms:
Regional Priority Credits
RP Credits encourage projects to prioritize credits that address location-specific environmental challenges, offering up to four bonus points based on the project’s ZIP code or region.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isto enhance the ability of LEED project teams to address critical environmental issues for the project’s location(Option D), as this reflects the intent of RP credits to focus on regional environmental priorities.
Why not the other options?
For a one-bedroom unit in a multi-family building, the minimum bathroom airflow requirement for intermittent local exhaust is:
25 cfm (11 lps)
50 cfm (23 lps)
1 cfm per ft² (5.08 lps per m²)
2 cfm per ft² (10.16 lps per m²)
TheLEED for Homes Rating System (v4)addresses bathroom 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 bathrooms, ASHRAE Standard 62.2-2010 requires a minimum airflow rate of 50 cfm (23 lps) for each bathroom to effectively remove moisture and pollutants. This applies to all dwelling units, including one-bedroom units in multi-family buildings.
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 bathrooms must provide at least 50 cfm (23 lps) per ASHRAE 62.2-2010 to ensure adequate ventilation in multi-family units.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer is50 cfm (23 lps)(Option B), as this is the minimum airflow requirement for intermittent bathroom exhaust in a one-bedroom unit per ASHRAE 62.2-2010.
Why not the other options?
A benefit of lower window U-factor is:
Increased visibility
Reduced energy use
Increased daylighting
Reduced maintenance
TheLEED for Homes Rating System (v4)addresses window performance in theEnergy and Atmosphere (EA) Credit: Windows, where a lower U-factor (thermal transmittance) improves energy efficiency by reducing heat loss or gain.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EA Credit: Windows (1–3 points)
Use windows with a lower U-factor to reduce energy use by minimizing heat transfer through the glazing, improving the home’s thermal performance and reducing heating and cooling loads.
Source: LEED Reference Guide for Homes Design and Construction, v4, Energy and Atmosphere Credit: Windows, p. 122.
TheLEED v4.1 Residential BD+Crating system confirms:
EA Credit: Windows
A lower window U-factor reduces energy use by decreasing heat loss in winter and heat gain in summer, contributing to overall energy efficiency.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isreduced energy use(Option B), as a lower U-factor directly improves the home’s energy performance by reducing thermal transfer.
Why not the other options?
Which of the following products could earn one point for being reclaimed under the Materials and Resources Credit, Environmentally Preferable Products?
Stained glass window
Downspouts and gutters
Steel garage doors with opener
Brick for the home’s exterior cladding
TheLEED for Homes Rating System (v4)awards points for theMaterials and Resources (MR) Credit: Environmentally Preferable Productswhen products are reclaimed (reused or salvaged from another project), contributing to the required percentage of material cost (e.g., 25% for 1 point).
According to theLEED Reference Guide for Homes Design and Construction (v4):
MR Credit: Environmentally Preferable Products (1–4 points)
Use products that are reused or salvaged from the same or another project for at least 25% (by cost) of the total materials to earn 1 point. Reclaimed products include salvaged architectural elements like stained glass windows, which are reused in their original form.
Source: LEED Reference Guide for Homes Design and Construction, v4, Materials and Resources Credit: Environmentally Preferable Products, p. 160.
TheLEED v4.1 Residential BD+Crating system confirms:
MR Credit: Environmentally Preferable Products
Reclaimed materials, such as salvaged stained glass windows, qualify for points if they contribute to the required material cost percentage (e.g., 25% for 1 point).
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isstained glass window(Option A), as it is a salvaged architectural element commonly reused in its original form, qualifying as a reclaimed material under the credit.
Why not the other options?
The minimum required outdoor air ventilation is calculated based on the conditioned floor area of the home and the:
Volume of the home
Number of bedrooms
Number of bathrooms
Number of full-time occupants
TheLEED for Homes Rating System (v4)addresses minimum outdoor air ventilation in theIndoor Environmental Quality (EQ) Prerequisite: Ventilation, usingASHRAE Standard 62.2-2010to determine ventilation rates based on conditioned floor area and the number of bedrooms.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EQ Prerequisite: Ventilation
Meet the minimum outdoor air ventilation requirements of ASHRAE Standard 62.2-2010, which calculates ventilation rates based on the conditioned floor area of the home and the number of bedrooms (as a proxy for occupancy). The formula is: Ventilation rate (cfm) = 0.01 × floor area (ft²) + 7.5 × (number of bedrooms + 1).
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
Ventilation rates are determined using ASHRAE 62.2-2010, based on conditioned floor area and the number of bedrooms, which accounts for typical occupancy levels.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isnumber of bedrooms(Option B), as ASHRAE 62.2-2010 uses this alongside conditioned floor area to calculate ventilation requirements.
Why not the other options?
Minimum outdoor air ventilation in a LEED for Homes project is addressed by which of the following standards?
IECC 2012
ENERGY STAR for Homes
ASHRAE Standard 62.2-2010
ASHRAE Standard 90.1-2010
TheLEED for Homes Rating System (v4)addresses minimum outdoor air ventilation requirements in theIndoor Environmental Quality (EQ) Prerequisite: Ventilation, which ensures adequate indoor air quality through proper ventilation design.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EQ Prerequisite: Ventilation
Meet the minimum outdoor air ventilation requirements of ASHRAE Standard 62.2-2010, Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings. This standard specifies minimum ventilation rates and other measures to provide acceptable indoor air quality in residential buildings.
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
Comply with ASHRAE Standard 62.2-2010 for minimum outdoor air ventilation rates in single-family and low-rise multifamily homes to ensure healthy indoor air quality.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isASHRAE Standard 62.2-2010(Option C), as it is the specific standard referenced for minimum ventilation requirements in LEED for Homes.
Why not the other options?
Which of the following is used to properly size space heating and cooling systems in accordance with LEED for Homes criteria?
ASHRAE 62.2
ACCA Manual J
SMACNA Publication 69.2
DOE 2006 HVAC Sizing Guide
TheLEED for Homes Rating System (v4)requires proper sizing of space heating and cooling systems to ensure energy efficiency, addressed in theEnergy and Atmosphere (EA) Prerequisite: Minimum Energy Performanceand related credits.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EA Prerequisite: Minimum Energy Performance
Size heating and cooling systems in accordance with ACCA Manual J (Residential Load Calculation). This ensures that HVAC systems are appropriately sized for the home’s thermal loads, improving energy efficiency and occupant comfort.
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
Use ACCA Manual J to calculate heating and cooling loads and properly size HVAC equipment to meet LEED requirements.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
TheACCA Manual J(Option B) is the standard method for sizing residential heating and cooling systems, ensuring they match the home’s thermal requirements.
Why not the other options?
Which of the following credits awards exemplary performance?
Materials and Resources Credit, Durability Management Verification
Location and Transportation Credit, Compact Development
Sustainable Sites Credit, Heat Island Reduction
Energy and Atmosphere Credit, Envelope Insulation
TheLEED for Homes Rating System (v4)allows certain credits to award exemplary performance points under theInnovation (IN) Credit: Innovationfor exceeding standard credit thresholds, promoting exceptional sustainability achievements.
According to theLEED Reference Guide for Homes Design and Construction (v4):
IN Credit: Innovation (1–5 points)
Exemplary performance points are awarded for achieving significantly higher thresholds than required for specific credits. ForLocation and Transportation Credit: Compact Development, exemplary performance is awarded for exceeding the maximum density or proximity requirements (e.g., higher dwelling units per acre or closer proximity to services).
Source: LEED Reference Guide for Homes Design and Construction, v4, Innovation Credit: Innovation, p. 190; Location and Transportation Credit: Compact Development, p. 57.
TheLEED v4.1 Residential BD+Crating system confirms:
IN Credit: Innovation
Exemplary performance is available for credits likeLT Credit: Compact Developmentwhen projects achieve significantly higher densities or connectivity than the standard credit requirements.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isLocation and Transportation Credit, Compact Development(Option B), as it is explicitly identified as offering exemplary performance points for surpassing density or connectivity thresholds.
Why not the other options?
The owner is considering a fireplace in a new house and is pursuing LEED for Homes certification. Which type of fireplace, if any, should be installed in order to achieve the maximum credit for Indoor Environmental Quality Credit, Enhanced Combustion?
Install no fireplace
EPA-certified woodstove
Masonry wood-burning fireplace
Factory-built wood-burning fireplace with catalytic combustor
TheLEED for Homes Rating System (v4)includes theIndoor Environmental Quality (EQ) Credit: Enhanced Combustion Venting, which awards points for minimizing indoor air quality risks from combustion appliances, including fireplaces. Avoiding combustion appliances altogether is the most effective way to achieve the maximum credit.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EQ Credit: Enhanced Combustion Venting (1 point)
To achieve the maximum credit, install no combustion appliances, including fireplaces, to eliminate the risk of combustion byproducts (e.g., carbon monoxide) entering the home. If fireplaces are installed, they must be direct-vented or power-vented with doors. EPA-certified woodstoves or factory-built fireplaces with catalytic combustors reduce emissions but do not achieve the maximum credit compared to no fireplace.
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
The highest level of compliance is achieved by installing no combustion appliances, including fireplaces. If fireplaces are used, they must be sealed and vented, but avoiding fireplaces maximizes indoor air quality protection.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isinstall no fireplace(Option A), as this eliminates combustion risks entirely, achieving the maximum credit for Enhanced Combustion Venting.
Why not the other options?
A builder plans to build two semi-detached residential homes at a rural lot he just bought, where the municipal water system cannot reach. The homes will use well water dug on site. The builder would like to build the two units as LEED certified homes. To meet the prerequisite of Water Efficiency domain in LEED Homes, what should the builder do?
Install two water meters for each unit separately
Use one water meter for the entire building of two units
These two semi-detached homes will be exempt from the prerequisite of Water Efficiency
At least one water meter will be shared by two units, and another separate meter will be used for monitoring landscaping water usage
TheLEED for Homes Rating System (v4)includes theWater Efficiency (WE) Prerequisite: Total Water Use, which requires metering to monitor water consumption in LEED-certified homes, even those using well water.
According to theLEED 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.
TheLEED v4.1 Residential BD+Crating 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 mustinstall 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?
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?
Who of the following may submit to Green Business Certification Inc. a LEED for Homes project for certification?
The Green Rater
The Energy Rater
The Quality Assurance Designee
The Owner or designated project team member
TheLEED for Homes Rating System (v4)outlines the certification process, including who is authorized to submit a project to the Green Business Certification Inc. (GBCI) for LEED certification.
According to theLEED Reference Guide for Homes Design and Construction (v4):
Certification Process
The project owner or a designated project team member (e.g., the project manager or LEED AP) is responsible for submitting the LEED for Homes project to GBCI for certification, coordinating with the LEED Green Rater for documentation and verification.
Source: LEED Reference Guide for Homes Design and Construction, v4, Introduction, p. 28.
TheLEED v4.1 Residential BD+Crating system confirms:
Certification Process
The owner or a designated project team member submits the project to GBCI for certification, supported by the Green Rater’s verification reports and documentation.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isthe Owner or designated project team member(Option D), as they are authorized to submit the project to GBCI.
Why not the other options?
A. The Green Rater: The Green Rater conducts field inspections and prepares verification reports but does not submit the project.
B. The Energy Rater: The Energy Rater focuses on energy performance (e.g., HERS Index) and does not handle submission.
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?
In order to take advantage of mountain views, a designer would like to include large glazing areas in a new home. Energy and Atmosphere Credit, Windows requires more stringent window performance if the:
Window-to-exterior wall area ratio is greater than 15%
Window-to-floor area ratio is greater than 15%
Window-to-exterior wall area ratio is greater than 24%
Window-to-floor area ratio is greater than 24%
TheLEED for Homes Rating System (v4)includes theEnergy and Atmosphere (EA) Credit: Windows, which sets performance requirements for windows to balance energy efficiency with design goals, such as large glazing areas for views. Higher window-to-wall ratios require more stringent performance to mitigate heat loss or gain.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EA Credit: Windows (1–3 points)
Meet the prescriptive window performance requirements based on the window-to-exterior wall area ratio (WWR). If the WWR exceeds 24%, more stringent U-factor and solar heat gain coefficient (SHGC) values are required to ensure energy efficiency.
Source: LEED Reference Guide for Homes Design and Construction, v4, Energy and Atmosphere Credit: Windows, p. 122.
TheLEED v4.1 Residential BD+Crating system confirms:
EA Credit: Windows
For projects with a window-to-exterior wall area ratio greater than 24%, windows must meet enhanced performance criteria (e.g., lower U-factor and SHGC) to reduce energy losses.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer iswindow-to-exterior wall area ratio is greater than 24%(Option C), as this triggers stricter window performance requirements to maintain energy efficiency.
Why not the other options?
The project team is planning trades training to meet requirements for the Integrative Process Credit, Option 2: Trades Training. How many hours are required to earn this credit?
Four hours
Six hours
Eight hours
Ten hours
TheLEED for Homes Rating System (v4)includes theIntegrative Process (IP) Credit: Integrative Process, Option 2: Trades Training, which requires training for construction trades to ensure proper implementation of green building strategies.
According to theLEED Reference Guide for Homes Design and Construction (v4):
IP Credit: Integrative Process, Option 2: Trades Training (1 point)
Provide at least four hours of training for construction trades involved in the project to educate them on LEED requirements, green building strategies, and proper installation techniques for sustainable systems 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: Trades Training
A minimum of four hours of trades training is required to ensure that contractors understand and correctly implement green building measures, earning the credit.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isfour hours(Option A), as this is the minimum duration required for trades training to earn the credit.
Why not the other options?
B. Six hours: This exceeds the minimum requirement of four hours.
C. Eight hours: This is unnecessarily long for the credit’s requirement.
After the HVAC contractor has completed the rough-in installation of all air handling equipment, what step should be taken to achieve Indoor Environmental Quality Credit, Contaminant Control during construction?
Flush the building for 48 hours
Open all the windows in the house
Seal off all duct boots and vents
Install temporary fans throughout the house
TheLEED for Homes Rating System (v4)includes theIndoor Environmental Quality (EQ) Credit: Contaminant Control, which includes strategies to prevent contaminants from entering HVAC systems during construction to maintain indoor air quality.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EQ Credit: Contaminant Control, Option 3: Construction Indoor Air Quality Management (1–2 points)
During construction, seal off all duct boots and vents after HVAC rough-in installation to prevent dust, debris, and other contaminants from entering the system, ensuring clean air distribution upon occupancy.
Source: LEED Reference Guide for Homes Design and Construction, v4, Indoor Environmental Quality Credit: Contaminant Control, p. 148.
TheLEED v4.1 Residential BD+Crating system confirms:
EQ Credit: Contaminant Control
Sealing duct boots and vents during construction is a required step to prevent contamination of HVAC systems, protecting indoor air quality.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isseal off all duct boots and vents(Option C), as this prevents contaminants from entering the HVAC system during construction, aligning with the credit’s requirements.
Why not the other options?
What is the minimum number of required hours the project team must meet in order to earn the Integrative Process Credit, Option 2: Design Charrette?
Four hours
Six hours
Eight hours
Twelve hours
TheLEED for Homes Rating System (v4)includes theIntegrative Process (IP) Credit: Integrative Process, Option 2: Design Charrette, which requires a collaborative meeting to integrate green strategies early in the design process.
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 with the project team lasting at least four hours to identify and integrate green strategies across all aspects of the building design, including energy, water, materials, and indoor environmental quality.
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 project team must hold a design charrette of at least four hours to collaboratively develop sustainable design strategies.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isfour hours(Option A), as this is the minimum duration required for the design charrette to earn the credit.
Why not the other options?
B. Six hours: This exceeds the minimum requirement of four hours.
C. Eight hours: This is unnecessarily long for the credit’s requirement.
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?
In addition to testing envelope leakage for energy impacts, a blower door test can be used in attached housing projects to evaluate:
Flow rate of local exhaust and supply fans or hoods
Quantity of moisture transfer through common wall systems
Effectiveness of non-toxic strategies designed to control pests
Potential for environmental tobacco smoke and odor contamination
TheLEED for Homes Rating System (v4)requires blower door testing in theEnergy and Atmosphere (EA) Credit: Air Infiltrationto measure envelope leakage, but it also has applications inIndoor Environmental Quality (EQ)credits for attached housing (e.g., multifamily or semi-detached homes) to assess air transfer between units.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EQ Credit: Compartmentalization (1 point, multifamily)
In attached housing projects, use a blower door test to evaluate the potential for environmental tobacco smoke and odor contamination between units by measuring air leakage through common walls and ensuring effective sealing. This ensures indoor air quality by preventing unwanted air transfer.
Source: LEED Reference Guide for Homes Design and Construction, v4, Indoor Environmental Quality Credit: Compartmentalization, p. 152.
TheLEED v4.1 Residential BD+Crating system confirms:
EQ Credit: Compartmentalization
Blower door testing in attached housing verifies the airtightness of shared walls, reducing the potential for environmental tobacco smoke, odors, or other contaminants to transfer between units.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer ispotential for environmental tobacco smoke and odor contamination(Option D), as blower door tests in attached housing assess air leakage through common walls, which can carry smoke or odors.
Why not the other options?
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?
What strategy should a team take in order to use tropical wood in their LEED registered project?
Use tropical wood that is FSC-certified
No strategy can be used because tropical wood cannot be used in a LEED project
Use any regional tropical wood that is not FSC-certified
Conduct a life-cycle assessment (LCA) to demonstrate that the materials used in the project comply with the intent of the prerequisite
TheLEED for Homes Rating System (v4)includes theMaterials and Resources (MR) Prerequisite: Certified Tropical Wood, which regulates the use of tropical wood to prevent unsustainable harvesting from ecologically sensitive regions.
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). If tropical wood is used, it must be FSC-certified to ensure it is sourced from sustainably managed forests.
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
Tropical wood, if used, must be FSC-certified to comply with the prerequisite. This ensures responsible forestry practices in tropical regions.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The most effective strategy is touse tropical wood that is FSC-certified(Option A), as this complies with the prerequisite and allows tropical wood in the project while ensuring sustainable sourcing.
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?
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?
25%
50%
75%
100%
TheLEED for Homes Rating System (v4)outlines the requirements for theLocation and Transportation (LT) Credit: Site Selection, which includesOption 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 theLEED Reference Guide for Homes Design and Construction (v4), the requirement forOption 2: Infill Developmentis 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 that75% of the site’s perimetermust 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 asAccess to Quality TransitorNeighborhood Pattern and Design, which consider community size or density. However, forSite Selection, Option 2, the focus is solely on the perimeter bordering previously disturbed land.
TheLEED v4.1 for Homesrating 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.
TheLEED AP Homes Candidate Handbookconfirms that the exam tests knowledge of theLEED v4rating system, including the LT credits, and references theLEED Reference Guide for Homes Design and Constructionas 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.
To earn credit for Energy and Atmosphere Credit, Space Heating and Cooling Equipment, the HVAC equipment must exceed the requirements set by:
ENERGY STAR for Homes, Prescriptive Path
ASHRAE 2001 Handbook of Fundamentals
International Energy Conservation Code
ACCA Manual J guidelines
TheLEED for Homes Rating System (v4)includes theEnergy and Atmosphere (EA) Credit: Space Heating and Cooling Equipment, which rewards the use of high-efficiency HVAC equipment that exceeds baseline standards.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EA Credit: Space Heating and Cooling Equipment (1–4 points)
Install HVAC equipment that meets or exceeds the efficiency requirements of the ENERGY STAR for Homes program, Prescriptive Path, which specifies minimum efficiency ratings (e.g., SEER, AFUE) for heating and cooling systems.
Source: LEED Reference Guide for Homes Design and Construction, v4, Energy and Atmosphere Credit: Space Heating and Cooling Equipment, p. 128.
TheLEED v4.1 Residential BD+Crating system confirms:
EA Credit: Space Heating and Cooling Equipment
HVAC equipment must exceed the efficiency standards set by ENERGY STAR for Homes, Prescriptive Path, to earn points for improved energy performance.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
The correct answer isENERGY STAR for Homes, Prescriptive Path(Option A), as this is the benchmark for high-efficiency HVAC equipment in this credit.
Why not the other options?
Points can be earned for Energy and Atmosphere Credit: Efficient Hot Water Distribution System, Option 1 through which of the following measures?
Limiting branch line length
Installing central manifold distribution
Installing demand-controlled recirculation
Insulating all domestic hot water piping to R-4
TheLEED for Homes Rating System (v4)includes theEnergy and Atmosphere (EA) Credit: Efficient Hot Water Distribution System, which aims to reduce energy and water waste in hot water delivery.Option 1: Length of Pipingfocuses on minimizing the length of hot water piping to reduce heat loss and delivery time.
According to theLEED Reference Guide for Homes Design and Construction (v4):
EA Credit: Efficient Hot Water Distribution System, Option 1. Length of Piping (1–2 points)
Design and install the hot water distribution system to meet one of the following requirements:
Maximum branch line length: The length of any branch line from the water heater or hot water source to any fixture must not exceed 20 feet (6 meters) for 1 point, or 10 feet (3 meters) for 2 points.This reduces the volume of water that must be purged before hot water reaches the fixture, saving energy and water.Source: LEED Reference Guide for Homes Design and Construction, v4, Energy and Atmosphere Credit: Efficient Hot Water Distribution System, p. 132.
TheLEED v4.1 Residential BD+Crating system maintains this requirement:
EA Credit: Efficient Hot Water Distribution
Option 1: Limit the length of branch lines from the water heater to fixtures to 20 feet (6 meters) for 1 point or 10 feet (3 meters) for 2 points.
Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.
Limiting branch line length(Option A) directly aligns with Option 1 of this credit, as it reduces the distance hot water must travel, minimizing heat loss and water waste.
Why not the other options?
TESTED 18 Aug 2025
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