Winter Sunlight
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BESS Winter Sunlight criteria for multi-unit developments (apartments, aged care, hotels) aims to enhance amenities and reduce heating needs. Points are allocated as per the following requirements.
"Points are awarded where at least 70% of dwellings receive at least 3 hours of direct sunlight in all Living areas between 9 am and 3 pm in mid-winter. This can be demonstrated on plans or by modelling (in conjunction with daylight modelling)."
Within BESS, 'Direct Sunlight' is defined as:
"Unobstructed sunlight that penetrates the living room space by at least 1 meter at any time during the day"
In direct terms for BESS, 'Direct Sunlight' refers to the illumination received directly from the sun between 9 am and 3 pm on the winter equinox (June 21st) into the Living Areas by at least 1 meter from the internal finishes for 3 hours of the day.
Once a Winter Sunlight simulation has been undertaken, results are available in your browser and a report detailing assumptions used and results achieved.
To meet Winter Sunlight's requirements, the Space's Purpose must be defined within the model for that Space to be selected for assessment. In this case, the 'Living Spaces' must be defined with a . Once defined, the is used to nominate the , , and before running a simulation. For the Metric, an metric must be configured as per the requirements of Winter Sunlight, where at least 70% of dwellings receive at least 3 hours of direct sunlight in all Living areas between 9 am and 3 pm in mid-winter. Midwinter is assumed to be the winter equinox (June 21st).
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