The project team is working to reduce the building's total energy costs in a cold climate. Which is the best strategy for the project team to consider?
Correct Answer: A
Detailed In a cold climate, additional envelope insulation is the most effective strategy for reducing energy costs. Improved insulation minimizes heat loss through the building envelope, reducing the demand for heating systems. This aligns with LEED's focus on enhancing energy efficiency and thermal performance in building design.
Question 62
In order to achieve Indoor Environmental Quality Credit, Quality Views the project team increased the window-to-wall ratio. Which prerequisite was impacted by this action?
Correct Answer: A
The correct answer is A. Energy and Atmosphere Prerequisite, Minimum Energy Performance. This is because: * Increasing the window-to-wall ratio (WWR) would reduce the solar heat gain and the cooling load of the building, which are two of the main factors that affect the energy performance of a building12. * The WWR is defined as the ratio of the area of windows to the area of external walls in a building3. The higher the WWR, the more natural light and ventilation can be achieved, which can improve the indoor environmental quality (IEQ) and reduce the need for artificial lighting and mechanical systems4. * The LEED AP BD+C V4 credit for IEQ requires that buildings have a minimum WWR of 15% for south-facing walls and 20% for north-facing walls5. However, this minimum WWR may not be sufficient to achieve optimal IEQ in hot regions, where high solar radiation and humidity levels create high cooling demand6. Therefore, increasing the WWR beyond these minimum values can help achieve better IEQ by reducing both solar heat gain and cooling load. * The other prerequisites are not impacted by increasing the WWR. Building-level energy metering is a prerequisite that requires measuring and reporting energy use at individual building units or zones5. Fundamental refrigerant management is a prerequisite that requires ensuring proper handling, storage, use, recovery, and disposal of refrigerants used in cooling systems5. Fundamental commissioning and verification is a prerequisite that requires ensuring that all commissioning activities are documented and verified according to LEED standards5. References: 1: Window-to-wall Ratio and Energy Efficiency: Finding the Perfect Fit 2: Impact of Window to Wall Ratio on Energy Loads in Hot Regions: A Study of Building Energy Performance 3: Determination of Optimum Window to External Wall Ratio for Offices in a Tropical Climate 4: Parametric Optimization of Window-to-Wall Ratio for Passive Buildings in Hot Regions 5: LEED v4: Building Design + Construction Guide - U.S. Green Building Council 6: Effect of building shape, orientation, window to wall ratios and zones on energy efficiency and thermal comfort of naturally ventilated houses in tropical climate
Question 63
Which of the following would be classified as a public use faucet?
Correct Answer: D
Under LEED BD+C Water Efficiency (WE) credits, a public use faucet is defined as a sink or faucet that is available for general use in shared spaces, rather than being restricted to private, residential, or patient- specific settings. * School classroom sinks are used by multiple people throughout the day, making them a public use fixture. * Patient room sinks, hotel sinks, and dorm room sinks are considered private use fixtures, as they are designated for individual users or a limited number of occupants. LEED water efficiency calculations differentiate between private and public use fixtures due to differences in water usage patterns and flow rate requirements. (Source: Official LEED BD+C Reference Manual)
Question 64
The Sustainable Sites Credit, Heat Island Reduction takes into account both new and three-year aged Solar Reflectance Index (SRI) values for roofing material because
Correct Answer: B
SRI generally decreases with age The Solar Reflectance Index (SRI) is a measure of the ability of a surface to reflect solar heat, as shown by a small temperature rise. It is calculated using the values of solar reflectance and thermal emittance of the surface. The higher the SRI, the lower the heat island effect. However, SRI generally decreases with age due to factors such as weathering, dirt accumulation, and biological growth. Therefore, the Sustainable Sites Credit, Heat Island Reduction takes into account both new and three-year aged SRI values for roofing material to ensure that the material maintains a high level of reflectance over time.
Question 65
A design team is pursuing Indoor Environmental Quality Credit, Indoor Air Quality Assessment. The building is 1,000 ft2 (93 m2) and has a 10 ft. (3 m) ceiling height. In order to earn the credit, what is the required volume of supply air for the entire building flush-out?
