Results Summary

The cumulative difference across the 4 categories assessed for Green Star compliance (Green Star Materials Life Cycle Impacts Innovation Challenge) shows a cumulative 111% reduction compared to the benchmark, achieving 4 points in the Life Cycle Assessment – LCA credit. A further 1 point is achieved for reporting on a further 5 impact indicators. Thus a full points is achieved for the credit.

Environmental Impact IndicatorUnitImprovement over Reference %
Global Warming Potentialkg CO2 e/m234
Abiotic Resource Depletionkg Sb e/m235
Eutrophicationkg PO4 e/m229
Human ToxicitymDaly/m222
Acidification Potentialkg SO2– e/m230
Photochemical Oxidant Creation Potentialkg C2H4 e/m224
Land Usem2.yr.arable/m228
Fresh Waterm3 deprived/m27
Ozone Layer Depletionmg CFC11e/m212

Project features

It is observed through the LCA modeling that the following areas have the greatest impact to the overall environmental footprint of the building:

Operational Energy

Operational Energy – The operational energy figures for the base building have been derived from energy modeling completed based on the project’s Green Star Ene 1 submission. The scope of these energy calculations aligns well with the EN15978 scope.

Life Span of Building

For the purposes of this study, a default service life of the building of 60 years has been applied in accordance with the Green Star Innovation Challenge criteria.

Building Maintenance and Operation

The frequency of materials used for replacement or repair is calculated via the product life spans for various building elements. The frequency of trade staff requirements and maintenance equipment requirements is intrinsically linked to the building component that is being repaired or replaced. For maintenance tasks not related to materials repair or replacement (for example window cleaning which requires no materials added to the building) the frequency is researched, applied to the model and verified.

This assessment was conducted by Umow Lai and certified by Pat Hermon from eTool in November 2015.