# IEQ 1.4 Daylight Access - Non-Residential
# Applies to
All non-residential development
# Objective
To provide a high level of amenity and energy efficiency through design for natural light.
# Summary
Points are awarded where it can be demonstrated by daylight modelling that >30% of the nominated area achieves a daylight factor of at least 2%. Additional points are awarded where it is shown that >60% or >90% of the floor area achieves this daylight factor. To claim this credit, you must use daylight modelling software to show the % of floor area achieving the target daylight factor, assuming a uniform design sky of 10,000 lux.
# Documentation & evidence required
- A short report detailing assumptions used and results achieved.
- The Green Star Hand Calculation Method is an acceptable method of demonstrating compliance
# Other Considerations
Before undertaking daylight modelling, use rules of thumb to check whether the daylight factor is likely to be achieved. To achieve a 2% daylight factor, maximum room depth is approximately three times the window head height (i.e. a room depth more than 7-10 meters is unlikely to meet the daylight factor).
Green Star Daylight Hand Calculation Guide (opens new window)