Results Summary: New Construction

Environmental Impact IndicatorUnitImprovement over Reference %
Global Warming Potentialkg CO2 e/m248 %
Abiotic Resource Depletion – Elementskg Sb e/m22 %
Eutrophication Potentialkg PO4 e/m224 %
Human ToxicitymDaly/m215 %
Acidification Potentialkg SO2– e/m225 %
Photochemical Oxidant Creation Potentialkg C2H4 e/m2-14 %
Water Footprintm3 deprived/m223 %
Ozone Layer Depletionmg CFC-11e/m22%

Results Summary: FitOut

Environmental Impact IndicatorUnitImprovement over Reference %
Global Warming Potentialkg CO2 e/m225 %
Abiotic Resource Depletion – Elementskg Sb e/m2-3 %
Eutrophication Potentialkg PO4 e/m27 %
Human ToxicitymDaly/m22 %
Acidification Potentialkg SO2– e/m210 %
Photochemical Oxidant Creation Potentialkg C2H4 e/m2-7 %
Water Footprintm3 deprived/m24 %
Ozone Layer Depletionmg CFC-11e/m2-1 %

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 requirements.

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.

Embodied Carbon reduction

The project team was responsible for significant upfront emission reduction with the following improvement strategies:

  • Use of mass timber in framing, floors and walls
  • Timber ceilings
  • Recycled brick wall
  • 30% Fly-ash as clinquer replacement in concrete mixes
  • Construction waste reduction

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.

HVAC High Efficiency

Significant savings in cooling,  air conditioning fans and pumps with the adoption of a highly rated COP/IPLV efficient HVAC equipment.

LED Lighting

Internal lighting energy demand reduced by 49% compared with the base case.

High Efficiency Services

High efficiency Services specification for lifts, domestic hot water system, unitary plant and hydraulic pumps.

Solar Photovoltaic System

130 kWp grid-connected solar system to produce clean electricity. Embodied impacts of panels, support system, cabling and electronics have also been account for.

The Author of the study is Jonathan Gieselbach of eTool and the critical review has been conducted by Tim Grant of Life Cycle Strategies.