Office building - Case Study This factsheet shows the potential of optimised technical building systems for office buildings1. Office buildings cover a floor area of approximately 1.7 billion square meters within Europe. Reference Office building Floor area: 1,676 m² View Northeast Final energy consumption: 297 kWh/m²a Heating Hot water Ventilation Cooling Lighting Gas condensing boiler Instantaneous water heaters Mechanical ventilation system without heat recovery Compression chiller Direct/indirect fluorescent tubes Technical building system Heating Hot water Ventilation Cooling Lighting Total [%] Total [kWh/m²a] Get the basics right Energy savings High performance Energy savings 20% 39% 0% 0% 23% 61% 36% 78% 0% 48% 20% 41% 58 121 The following table illustrates energy and energy cost savings as well as the required investment and payback period for the case study (building level). Optimisation package Final energy savings [%] Energy cost savings* [Euro] Investment [Euro] Payback period [years] Get the basics right 20% 7,970 7,150 1.0 High performance 41% 18,560 78,350 4.0 * EU28 energy cost averages from 2017 to 2030 as used in EPBD impact assessment (Gas: 5.9 ct/kWh; District heat: 9.6 ct/kWh; Electricity: 21.9 ct/kWh) 1 In the underlying study of this factsheet two office buildings with a different heat transfer system have been analysed: radiators vs. air heating. Differences between the two systems turned out to small. This factsheet shows the office buildings with radiators.
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