# 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
This is a mandatory credit. A minimum score of 33% is required in this credit to pass the IEQ category.
The credit may be scoped out for projects where daylight is not appropriate. For example in cinemas.
To claim this credit, you must use daylight modelling software or daylight calculations to show the % of floor area achieving the target daylight factor of 2%, assuming a uniform design sky of 10,000 lux.
Points are awarded where it is demonstrated that a minimum of 33% of regular use areas (by floor area) achieves the target daylight factor.
Additional points are awarded where a higher proportion of regular use areas (by floor area) achieves the target daylight factor.
Maximum points are awarded where 100% of regular use areas (by floor area) achieves the target daylight factor.
# 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 target 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 target daylight factor).
Green Star Daylight Hand Calculation Guide (opens new window)