Visual Comfort

12 credits and 3 points available

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17+ Years Experience In ESD

Our diverse team of Professionals include, Architects, Engineers and ESD Specialists. We have been around long enough to work on all possible project types. See our Past Projects. Deemed to satisfy as our team goes through 100's Section J reports every year.

Credit criteria

To qualify for points under this credit a minimum requirement must first be met. 12.0 Glare Reduction: It is a minimum requirement of this credit that the glare, in the nominated area from sunlight through all viewing façades and skylights is reduced through a combination of blinds, screens, fixed devices, or other means. 12.1 Daylight: Up to 2 points are available where a percentage of the nominated area receives high levels of daylight: For 40% of the nominated area – 1 point; For 60% of the nominated area – 2 points. 12.2 Views - 1 point is available where 60% of the nominated area has a clear line of sight to a high quality internal or external view.

 

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Aim of the Credit

To recognise the delivery of well-lit spaces that provide high levels of visual comfort to building occupants.

Nominated area

For this credit, the nominated area is all primary spaces.Please see the ‘List of Areas’ section of the Submission Guidelines for space type definitions. Where the functional requirements of the space require that the visual comfort requirements differ from the requirements of this credit (such as bedroom/sleeping area), or if the space will not be regularly occupied (for example a residential bathroom), these areas may be excluded. With the exception of bedrooms/sleeping areas and bathrooms in residential dwellings, the reasons for exclusions must be justified by project teams. Residential Projects- Where it is expected that blinds will be installed by the occupiers of residential units, these spaces are excluded from this minimum requirement.

 

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It is a minimum requirement for this credit that glare from sunlight through all viewing façades and skylights in the nominated area is reduced through a combination of blinds, screens, fixed devices, or other means. Three options are provided and a combination of the methods outlined can be used to demonstrate compliance with this minimum requirement.

Screen Shot 2019-11-26 at 11.52.27 am

 

Up to two (2) points are awarded where project teams can demonstrate that a specified proportion of the nominated area receives high levels of daylight.

There are three options are provided for demonstrating compliance with this requirement. A combination of methods can be used across the building to demonstrate compliance. Screen Shot 2019-11-26 at 11.53.19 am

 

Compliance with option 12.1A is demonstrated by calculation, and compliance with options 12.1B and 12.1C is demonstrated by modelling. Compliance for this credit cannot be demonstrated by measurement of actual daylight levels in the building.

Permanent partitions must be included within the modelling of this credit.

If choosing the modelled pathways under 12.1B or 12.1C, project teams must define reflectance values to represent the project’s design. If values are unknown, refer to a relevant Standard for guidance.

Daylight Factor

When calculating Daylight Factor, either a CIE overcast sky or CIE uniform sky may be used. The daylight Factor is to be determined either at the finished floor level, or 720mm above FFL

Daylight Autonomy

Calculations must be completed for at least every hour during the Nominated Hours.

There are a number of dynamic simulation software programs that can be used to show compliance with the credit criteria. Daysim, ESP-r, Lightswitch Wizard, and SPOT (>Ver 4.0) can be used. Where other programs are used, the project team must demonstrate that the software is based on the Radiance simulation engine, and that it uses the statistical sky, the daylight coefficients and Perez All Weather Sky model, or the annual CIE sky simulation algorithms.

Project modelling must include shading from any shutters or overhangs. A nearby building or feature (such as a cliff face) must be accounted for in overshadowing where the building height is at least a third of the height of the proposed building design, and, where the angle between the nearest point at the top of that building and the nearest point at the base of the proposed building is greater than the 21 June (winter) midday altitude of the sun.

Shading devices (including blinds) must be modelled as operating the same as the ‘Greenhouse Gas Emissions’ credit (15). This means they can be modelled as being in a fixed position, or being controlled (automatically or by occupants), providing the same approach is taken between the two credits.

One (1) point is awarded where at least 60% of the nominated area has a clear line of sight to a high quality internal or external view. All floor areas within 8m from a compliant view can be considered to meet this credit criterion.

The line-of-sight shall be measured by extending a perpendicular line from the view, be it a window, opening or internal view. A line at 45° can be used at the corners of the view. The thickness of the external walls must be taken into account in the calculations. Internal or external columns can be ignored.

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