New build Post-occupancy study
User satisfaction: building performance comparative data
Key:
Iron Steel Old 5 Building Average
Energy use: comparisons with previous buildings
Previous Previous Vulcan House Design
> Sustainability management plan building A buildings B+C Steel 2008-09 target
A challenging task for the contractor was in managing 2007-08 2007-08
the client’s sustainability requirements through to
Electricity 173 150 124 102
delivery. A detailed sustainability management plan
Gas 197 100 69 88
provided a framework for this process and ensured
procedures were adopted to enable the monitoring
Total kWhrs/ 370 258 193 189
and reporting of CO2 emissions associated with site
sqm/yr
activities and construction transport. KgCO2/ 132 101 81 73
A monthly sustainability report recorded water sqm/yr
consumption, waste production and recycling. Targets
Buildings A, B and C totalled 8,399 sq m NIA, with 958 FTEs. Steel, at 11,067 sq m NIA
were established for all measured parameters against accommodates approx 1,200 FTEs
best practice and agreed benchmarks. With waste
Source: Office of Government Commerce
management a major issue across the construction
industry, segregation of different waste streams was
essential to facilitate waste recycling. Where space MacDonald shows that the energy taken to construct a
constraints meant this was not feasible, appropriate new building is broadly equivalent to that of operating
waste contracts with specialist contractors ensured the same building for one year.
that segregation for recycling was completed off site
at a licensed facility. Suppliers were encouraged to District heating system
take back packaging to the factory of origin for use in Sheffield already benefits from a low-carbon district
packaging subsequent deliveries to the site. heating scheme with hot water generated at a
large municipal waste incinerator and circulated
Plotting carbon footprint throughout the central city area. Perversely the design
The project was one of the first in the UK to monitor team could not propose this energy source because
the carbon footprint of the site construction activities. of idiosyncrasies in the BREEAM methodology that
Final figures turned out at 650,000 kg of CO2. This meant losing three pollution points under the 2005
data, shown in the ‘Cumulative CO2 Emissions’ chart version.
on the next page, will help establish a baseline for the The team has also completed a study looking at
environmental performance of future government and the possibility of installing a 900 sq m photovoltaic
commercial office projects. (PV) array on the roof in combination with a gas-fired,
Closer examination of the data showed that 75 per combined heat and power (CHP) plant. Capitalising
cent of the carbon used came not from the build itself on existing computer models, the design team found
but from transportation of materials and operatives that employing renewable technology would reduce
to site. Significant sources of carbon are emitted carbon by only 11 per cent. This is in part due to the low
during the on-site construction and fit-out process of requirement for heating energy and the limited roof
buildings. A recent study by consultant engineers Mott area for a PV array. Given current grant incentives and >
34 CIBSE Journal January 2010
www.cibsejournal.com
CIBSEjan10 pp32-36_Vulcan.indd 34 17/12/09 16:04:18
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