Green Buildings Delivered

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Green Buildings Delivered

  1. 1. Green Buildings – Delivered!Dr Kerry J Mashford, Chief Executive,National Energy FoundationGreenBuild Expo – 8th& 9thMay 2013Improving the use ofenergy in buildings
  2. 2. “In theory, theory and practice are the same………..in practice, they aren’t”Green Buildings – Delivered!
  3. 3. Building often don’t perform as expected –design isn’t realitySource : Bill Bordass based on data from Better Buildings Partnership
  4. 4. Where does the performance gapcome from?
  5. 5. How does the performance gap arise?
  6. 6. What causes the gaps?• Technology Strategy Board has commissionedover 100 study projects on: New-build domestic(comprising 366 dwellings within developments totalling 3989 dwellings) New-build + refurbished non-domestic– 51 studies• Case studies – specific root causes and how toavoid them• Body of evidence revealing common issues
  7. 7. Outputs from Technology StrategyBoard BPE programmeEmerging themes•Commissioning•Sub-meters and reconciliation•BMS•Controls / complexity•Lighting – too much and inability to control•Fabric performance•MVHR systemsCredit: Technology Strategy Board
  8. 8. Building Performance Evaluation -measuring performance
  9. 9. Benchmark – compare usingTM46/CarbonBuzz• The graphs represent the median CO2 emissions for design andactual CarbonBuzz records sector-by-sector on a scale of 0-200kgCO2/m2/yr. The figures below each column represent thenumber of records per sector. The performance gap tends to bearound 150-200% where the number of records are statisticallysignificant, such as schools and offices.
  10. 10. Ensure your building is not onlydesigned green but delivered greenSave costs, energy and carbonImprove comfort
  11. 11. www.nef.org.ukkerry.mashford@nef.org.ukImproving the use of energy inbuildings

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