Daylighting Sources and Components
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Questions and Answers

What is the primary objective of daylighting design?

  • To increase the amount of HVAC costs
  • To minimize the amount of artificial light and reduce electricity costs (correct)
  • To increase the use of artificial lighting
  • To reduce the amount of natural lighting
  • What is the effect of natural lighting on HVAC costs?

  • It has no impact on HVAC costs
  • It depends on the type of HVAC system
  • It increases HVAC costs
  • It lowers HVAC costs (correct)
  • What is the formula to calculate internal illuminance?

  • Internal illuminance = (Daylight factor / External illuminance) x 50%
  • Internal illuminance = (Daylight factor x External illuminance) / 100% (correct)
  • Internal illuminance = (Daylight factor x External illuminance) / 50%
  • Internal illuminance = (External illuminance / Daylight factor) x 100%
  • What does IRC represent in daylighting design?

    <p>Reflected skylight and groundlight</p> Signup and view all the answers

    What is the recommended daylight factor for a kitchen?

    <p>2%</p> Signup and view all the answers

    Under what sky conditions are the guidelines for initial daylighting design assumed?

    <p>Overcast sky conditions</p> Signup and view all the answers

    What is the ERC formula based on?

    <p>SC × RD × RF</p> Signup and view all the answers

    What is the distance beyond which a zone will receive virtually no daylight?

    <p>30 ft</p> Signup and view all the answers

    What is the purpose of the Sidelighting and Toplighting Daylight Factor Guideline?

    <p>To determine daylight factor values</p> Signup and view all the answers

    What is the CIE method based on?

    <p>The daylight factor applied to the standard overcast CIE sky</p> Signup and view all the answers

    What is the Graphic Daylighting Design Method (GDDM) used for?

    <p>To assess qualitative and quantitative aspects of daylighting design</p> Signup and view all the answers

    What is the 15/30 guideline based on?

    <p>Sufficient daylight delivery to the desk plane</p> Signup and view all the answers

    What is the primary purpose of understanding the components of daylight in building design?

    <p>To select the appropriate materials and design apertures</p> Signup and view all the answers

    What is the sum of the three components that make up the Daylight Factor (DF)?

    <p>SC + ERC + IRC</p> Signup and view all the answers

    What is the assumption made by the 2.5H guideline in terms of daylight delivery?

    <p>Daylight is delivered at a depth 2.5 times the height of the window above the desk plane</p> Signup and view all the answers

    What is the Externally Reflected Component (ERC) of daylight illuminance?

    <p>The light reflected from exterior obstructions on to the point under consideration</p> Signup and view all the answers

    What is the purpose of the 15/30 guideline in daylighting design?

    <p>To calculate the Daylight Factor (DF) for a given location</p> Signup and view all the answers

    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?

    <p>ERC = SC × 0.25 × 0.20</p> Signup and view all the answers

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