Building Operation Award
2 St Paul's Place, Sheffield
As part of a Department for Education (DfE) project team, Mott MacDonald undertook a £3.7m fit-out of 2 St Paul’s Place in Sheffield, an eight-floor building with a 10,483m2 gross internal area.
The building’s energy base performance certificate (EPC) B-rating score of 49 was improved to 44, while the BREEAM Offices 2006 Very Good rating (score of 58) was elevated to a BREEAM Fit-out 2008 Excellent rating (score of 72.12).
The initial, highly sustainable fit-out included the conversion of a basement car park to accommodate a 180m2 national IT data centre. The upper floors were refurbished to create highgrade offices and meeting rooms to best practice Office of Government Commerce (OGC) and sustainability standards.
Much of the existing base-build services were reused, repositioning and rezoning four pipe comfort cooling fan coils, converting lighting controls to include column-mounted occupant override switches and retrofitting daylight and passive infrared (PIR) sensing automatic controls. Thermal wheels were fitted to air-handling units, while rainwater collection for flushing WC cisterns was added. A 20kW output 126 photovoltaic panel array on the roof was fitted, in addition to the solar thermal panels that provide hot water for the new rooftop staff restaurant prep area, and existing energy metering was upgraded and widened. Lifecycle paybacks were verified using extensive thermal modelling and energy/carbon prediction techniques.
After two years of full operation, the effect of implemented post-occupancy energy-upgrade interventions has been to improve the DEC score compiled in September 2012 from Band G at 216 (or, taking Mott MacDonald’s corrected figure, Band F at 127) to Band D at 89. This has occurred despite a small increase in staff numbers from 580 to just over 600. This score marks 2 St Paul’s Place as one of – if not the – lowest-scoring, fully air-conditioned office building on the UK government estate.
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