1. ZERO CARBON HUB Rob Pannell Head of Housebuilding

2. PURPOSE AND STRATEGIC OBJECTIVES Facilitate the mainstream delivery of low and zero carbon homes  Provide leadership and create confidence  Reduce risk and clear obstacles  Disseminate information ROLE OF THE ZERO CARBON HUB

4. OUR CURRENT POSITION New Domestic New Non - Domestic Existing Domestic Existing Non - Domestic

5. BuildingEnergy ConsumerSkills Examples FIVE WORKSTREAMS

6. PROCESS

8. EXAMPLES

10. JOURNEY TO ZERO CARBON HOMES 3 4 6

11. 70% 4.5

12. 12 Energy Efficiency  The latest developments

13. Defining the Fabric Energy Efficiency Standard for zero carbon homes 13

14. Scene Setting - Policy 14 Zero Carbon Hierarchy Energy Efficiency On-site LZC tech. or connected heat Allowable Solutions 70% Carbon Compliance TG Scope Zero Carbon

15. Scope of ‘Energy Efficiency’ 15  Building fabric U-values  Thermal bridging  Air permeability  Thermal mass  Solar, metabolic, lighting & appliance gains  Heating / cooling appliances (boilers, etc)  Mechanical ventilation  Hot water  Active controls  Fixed lighting  All LZC technologies Energy Efficiency Standard Carbon Compliance Standard heat power LZC technology

16. 16 RECOMMENDATION: Metric for Energy Efficiency  kWh/m²/yr space heating & space cooling demand  Performance standard  With design guidance  Design Flexibility  Takes into account building form  Promotes innovation  Known level of performance  Known ‘currency’ internationally

17. Specifications Modelled Baseline Spec A (NV) Spec B (MVHR) Spec B (NV) Spec C- (MVHR) Spec C- (NV) Spec C (MVHR) Spec C (NV) Spec D (MVHR) External Walls 0.280.250.18 0.15 0.15 – 0.09 Party Walls0.500000000 Floor0.2 0.18 0.15 0.15 – 0.08 Roof0.160.150.13 0.11 0.10 – 0.06 Windows 1.8 (double) 1.5 (double) 1.4 (double) 1.2 (double) 0.8 (triple) 1.0 – 0.6 (triple) Doors1.61.41.2 11110.8 Air leakage (m³/hr/m²) 753333131.26 – 0.41 Thermal bridging (W/m²K) 0.080.060.05 0.04 Ventilation Natural (extract fans) Natural (extract fans) MVHR Natural (extract fans) MVHR Natural (extract fans) MVHR Natural (extract fans) MVHR Current practice PassivHaus equivalent Modified AECB Silver Standard U-values (W/m²K) Spec C but double glazed & air leakage = 3 EST APEE Standard EST BPEE Standard = between Spec A & Spec B

18. 18 Will have to work harder Similar build specs RECOMMENDATION: Level Space Heating & Space Cooling Demand, kWh/m²/yr

19. What this means Energy demand reduction 19

20. 20 What this means Relationship with 70% Carbon Compliance

21. Decision Criteria: Task Group Assessment

22. 22 Capital Cost Energy Efficiency Measures

23. Whole Life Cost: Carbon Compliance Semi-detached House 23 Basis: 70% carbon compliance Over 60 years Assumptions: Net present ‘extra over’ costs Energy inflation = RPI + 2.5%, Discount rate = 5% Full costs exclusive of land take

24. 24 Whole Life Cost: Carbon Compliance Semi-detached House

25. 25 Whole Life Cost: Carbon Compliance Semi-detached House

26. 26 Whole Life Cost: Carbon Compliance Semi-detached House

27. 27 Whole Life Cost: Carbon Compliance Semi-detached House

28. 28 Supplementary Work Required Zero Carbon HubGovernmentResearch Integration into CfSH consultationCfSH Health / Air permeability / VentilationTask GroupPart FRequired Certification, Verification & AuditTask GroupPart LRequired Actual dwelling performanceFacilitationTSB / otherRequired Land take costsTask group Design Guidance Task Group / industry SAP 2009 modelling tool development / rebasing CC Assumptions Task Group SAP / Part L Additional dwelling modellingRequired OverheatingRequired

29. 29 Recommendations Summary  Metric  kWh/m²/yr  Space heating + Space cooling demand  Level  Implementation  2016 with interim step in 2013  Strong section in CfSH consultation  Strongly worded ministerial statement  Timeline implications Blocks of flats and mid terrace houses:39 kWh/m²/yr Semi-detached, end terrace and detached houses:46 kWh/m²/yr

30. 30 Allowable Solutions  The latest developments

31. 31 July 2009 Ministerial Statement  Allowable solutions that received broad support: Further carbon reductions on site... Energy efficient appliances... Advanced forms of building control system... Exports of low carbon or renewable heat... Investments in LZC community heat infrastructure.  Others remain under consideration: Retrofit Offsite renewable electricity

32. 32 Thankyou for Listening