# Indoor Environment Quality 1.6 Daylight Access – Secondary habitable rooms
# Applies to
Multi-unit development (Apartments, aged care and hotels) Applies when daylight metric selected = Spatial Daylight Autonomy
# 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 66% is required in this credit to pass the IEQ category.
To claim this credit, you must use daylight modelling software to show the % of floor area achieving adequate daylight to secondary habitable rooms.
Points are awarded where adequate daylight is achieved to at least half the floor area of at least 80% of the number of secondary habitable rooms. All secondary habitable rooms must achieve adequate daylight to at least a quarter of the floor area of the room.
Additional points are awarded where more than 80% of the number of secondary habitable rooms achieve adequate daylight to at least half of the floor area of the room.
Maximum points are awarded where adequate daylight is achieved to at least half the floor area of all secondary habitable rooms.
# Documentation & evidence required
A daylight report detailing assumptions used and results achieved. Refer Spatial Daylight Autonomy (link to this section) and Daylight modelling report (link to this section)
# Other Considerations
- Specify glazing with high Visual Light Transmittance (VLT) and combine this with shading systems such as blinds, overhangs or retractable awnings, rather than using heavily tinted glass.
- Light shelves can increase daylight penetration by 'bouncing' light deeper into a room