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Key specification data and design features
Roof U-value0.23 W/m2.K
Wall U-value0.25 W/m2.K
Ground U-value0.27 W/m2.K
Window U-value 0.18 W/m2.K (Double glazing with mid-pane venetian blinds)
Structural frameConcrete
Floor constructionIn-situ concrete floors with exposed soffits
Ventilation strategyNatural ventilation for open-plan floor areas (75%) and local air handling units for %09meeting rooms (25%)
Heat sourceGas-fired condensing boilers%3Cbr /%3E
Photovoltaic array25 kW (peak-rated output), 200m2 total array area
Solar water heating installationSized to pre-heat at installation least 40% of annual domestic hot water%3Cbr /%3E
General lighting installation300 lux using T5 fluorescent installation luminaires (installed load 8-10W/m2)
Rainwater recoveryRainwater storage tank to collect surface water from the roof and recycle for WC flushing%3Cbr /%3E
BREEAM ratingExcellent