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A project's massing and site orientation can have a direct impact on which of the following prerequisites?
Minimum Energy Performance
A project’s massing and site orientation can have a direct impact on the minimum energy performance prerequisite, which requires projects to demonstrate a percentage of energy cost savings compared to a baseline building. Massing and orientation affect the amount of solar heat gain, daylight availability, natural ventilation potential, and wind exposure of the building, which in turn influence the heating, cooling, lighting, and ventilation loads and strategies. By optimizing the massing and orientation of the building, projects can reduce their energy consumption and improve their thermal and visual comfort.
A project has total waste of 20 tons (18.1 tonnes) that includes the following:
· 8 tons (7.3 tonnes) of recycled demolition steel and concrete
· 2 tons (1.8 tonnes) of trees cleared from the site
. 3 tons (2.7 tonnes) of commingled scrap with 40% diverted
. 6 tons (5.4 tonnes) of used furniture donated to a non-profit organization
· 1 ton (0.9 tonnes) of removed carpet and ceiling tiles sent back to the manufacturer
What is the percentage of diverted waste for Materials and Resources Credit, Construction and Demolition Waste
The percentage of diverted waste for Materials and Resources Credit, Construction and Demolition Waste Management is calculated by dividing the total weight of diverted materials by the total weight of waste generated1. Diverted materials are those that are reused, recycled, salvaged, or donated2. In this case, the total weight of diverted materials is:
The sum of these weights is 16.2 tons (14.7 tonnes). The total weight of waste generated is 20 tons (18.1 tonnes). Therefore, the percentage of diverted waste is:
(16.2 / 20) x 100 = 81%
However, the credit allows for a 10% adjustment for vegetative waste, which is not considered a building material3. Therefore, the percentage of diverted waste after adjustment is:
(81 - 10) = 71%
The closest answer option to this value is B. 75%.
Which of the following is required for a cooling tower or evaporative condenser in Water Efficiency Prerequisite, Indoor Water Use Reduction?
Makeup water meters, conductivity controllers and overflow alarms
According to the Water Efficiency Prerequisite for Indoor Water Use Reduction, cooling towers and evaporative condensers must be equipped with makeup water meters, conductivity controllers and overflow alarms to reduce water consumption and prevent water waste. These devices help monitor and control the water quality, flow rate and level of the cooling system, and alert the operators of any malfunctions or leaks.
References: As per the LEED AP Building Design + Construction (LEED AP BD+C) V4 resources, the installation of makeup water meters, conductivity controllers and overflow alarms is a requirement for cooling towers and evaporative condensers under the Water Efficiency Prerequisite for Indoor Water Use Reduction. This prerequisite aims to reduce indoor water consumption by setting baseline and efficiency standards for fixtures, fittings, appliances, equipment and processes. For cooling towers and evaporative condensers, the prerequisite also requires efficient drift eliminators that reduce drift to a maximum of 0.002% of recirculated water volume for counterflow towers and 0.005% of recirculated water flow for cross-flow towers. For more detailed information, you can refer to the web-based reference guide in the credit library at USGBC’s official website.