18 Questions
What is the primary objective of daylighting design?
To minimize the amount of artificial light and reduce electricity costs
What is the effect of natural lighting on HVAC costs?
It lowers HVAC costs
What is the formula to calculate internal illuminance?
Internal illuminance = (Daylight factor x External illuminance) / 100%
What does IRC represent in daylighting design?
Reflected skylight and groundlight
What is the recommended daylight factor for a kitchen?
2%
Under what sky conditions are the guidelines for initial daylighting design assumed?
Overcast sky conditions
What is the ERC formula based on?
SC × RD × RF
What is the distance beyond which a zone will receive virtually no daylight?
30 ft
What is the purpose of the Sidelighting and Toplighting Daylight Factor Guideline?
To determine daylight factor values
What is the CIE method based on?
The daylight factor applied to the standard overcast CIE sky
What is the Graphic Daylighting Design Method (GDDM) used for?
To assess qualitative and quantitative aspects of daylighting design
What is the 15/30 guideline based on?
Sufficient daylight delivery to the desk plane
What is the primary purpose of understanding the components of daylight in building design?
To select the appropriate materials and design apertures
What is the sum of the three components that make up the Daylight Factor (DF)?
SC + ERC + IRC
What is the assumption made by the 2.5H guideline in terms of daylight delivery?
Daylight is delivered at a depth 2.5 times the height of the window above the desk plane
What is the Externally Reflected Component (ERC) of daylight illuminance?
The light reflected from exterior obstructions on to the point under consideration
What is the purpose of the 15/30 guideline in daylighting design?
To calculate the Daylight Factor (DF) for a given location
What is the formula to calculate the ERC in a given scenario, where 25% of the sky is obstructed by a building with a 20% RF?
ERC = SC × 0.25 × 0.20
Learn about the different types of daylight sources, including direct and indirect sources, and understand the components of daylight, such as daylight factor and external reflectance.
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