# Operational Energy 2.1 Greenhouse Gas Emissions
# Applies to
All development types
# Objective
Ensure the efficient use of energy and to reduce greenhouse gas emissions from building energy use.
# Summary
Points are awarded when annual greenhouse gas emissions are below the benchmark for residential projects. More points are awarded for every percentage improvement in greenhouse gas emissions. Maximum score is awarded for 20% reduction against the benchmark.
For non-residential projects, points are awarded for meeting the benchmark, demonstrated by commitment to deemed-to-satisfy criteria. Otherwise greenhouse gas emissions are calculated from energy modelling results, which includes both building fabric and building services inputs.
# Documentation & evidence required
- If using the DtS method, provide insulation specifications (R-values), preliminary facade calculation, heating and cooling system type and CoP/EER, and water heating system details.
- If you are providing your own calculations for non-residential, supply modelling assumptions and results. Ensure that methods meet the requirements of the NCC Verification Method JV3 and BESS requirements.
- If you are proposing an alternative energy modelling protocol, seek approval from the relevant local council before proceeding.
- For all dwellings, show heating/cooling outdoor units (condensers), solar hot water panels and clotheslines on plans.
If you using providing your own calculations for dwellings, supply modelling assumptions and results. Include energy and greenhouse emissions for heating, cooling, hot water and clothes drying, with calculations clearly shown.