Green Star

    A voluntary sustainability rating system for buildings in Australia. 

    It was launched in 2003 by the Green Building Council of Australia. The Green Star rating system assesses the sustainability of projects at all stages of the built environment life cycle.

    In 2013, the GBCA released a report, The Value of Green Star, which analysed data from 428 Green Star-certified projects. The research found that, on average, Green Star-certified buildings produce 62% fewer greenhouse gas emissions and use 66% less electricity than average Australian buildings. Green Star buildings use 51% less potable water than average buildings. Green Star-certified buildings also have been found to recycle 96 per cent of their construction and demolition waste, compared to the average 58% for new construction projects.

    Rating system:

    Green Star benchmarks projects against the nine Green Star categories of: Management; Indoor Environment Quality; Energy; Transport; Water; Materials; Land Use & Ecology; Emissions and Innovation.

    Within each category are credits which address specific aspects of sustainable building design, construction or performance. Ratings for buildings are available at the design stage (‘Design’ ratings), at the post-construction phase (known as ‘As Built’ ratings) or for interior fitouts (‘Interiors’ ratings).

    The assessment panel awards points, with a Green Star rating determined by comparing the overall score with the rating scale:

    ScoreRatingCategory
    10-19One StarMinimum Practice
    20-29Two StarAverage Practice
    30-44Three StarGood Practice
    45-59Four StarBest Practice
    60-74Five StarAustralian Excellence
    75+Six StarWorld Leadership

    Buildings assessed using the Green Star – Performance rating tool will be able to achieve a Green Star rating from 1 – 6 Star Green Star.

    Indoor air quality

    Is the air quality within and around buildings and structures. IAQ is known to affect the health, comfort, and well-being of building occupants.

    Poor indoor air quality has been linked to sick building syndrome, reduced productivity, and impaired learning in schools.

    IAQ can be affected by gases (including carbon monoxide, radon, voc), particulates, microbial contaminants (mold, bacteria), or any mass or energy stressor that can induce adverse health conditions. Source control, filtration, and the use of ventilation to dilute contaminants are the primary methods for improving indoor air quality in most buildings. Residential units can further improve indoor air quality by routine cleaning of carpets and area rugs.

    IAQ is part of indoor environmental quality (IEQ), which includes IAQ as well as other physical and psychological aspects of life indoors (e.g., lighting, visual quality, acoustics, and thermal comfort).