Building Regulations and the Future of Energy Efficient Buildings. Chris Hughes Programme Manager Energy Performance of Buildings Directive

Transcription

1 Building Regulations and the Future of Energy Efficient Buildings Chris Hughes Programme Manager Energy Performance of Buildings Directive

2 Overview SEAI Energy Efficiency Building Regulations Part L Conservation of Fuel and Energy Part F Ventilation EPBD

3 Sustainable Energy Authority of Ireland Statutory authority, established 1st May 2002 Mission of transforming Ireland into a society based on sustainable energy structures, technologies and practices, and a vision of making Ireland a recognised global leader in sustainable energy New 5 year strategy published March 2010 c. 66 staff in four locations: Dublin, Dundalk, Sligo, Cork Reporting to Department of Communications, Energy and Natural Resources

4 SEAI Role in EPBD SEAI is the designated Issuing Authority Provision of methodologies and calculation software Defining rules for competence and conduct Administering National BER Scheme: Registering BER Assessors National BER Domestic Assessor Exam Processing BER Assessments Hosting BER Registers Quality Assurance and Auditing BER Helpline Promoting awareness of BER Advice and support to Government Departments

5 Primary Energy Requirement Transport 33% Agriculture 3% Residential 25% Industry 23% Commercial /Public 16%

6 Contribution of Part L Building Regulations to National Energy Reduction 2020 Targets Transport Sector 20% Energy Supply Sector 2% Building Regulations 29% Other Residential and Business & Public Sector incentives 49% Source: NEEAP 2009

7 SEAI Low Carbon Opportunity Study Negative abatement cost 2.5 million tco 2e abated

8 Energy Efficiency Targets National Climate Change Strategy Limit CO2 emissions to 13% above 1990 levels Programme for Government % Improvement in 2005 Dwellings by % Improvement in 2005 Dwellings by 2010 Establish ambitious but realistic % reduction on current standards by 2011 for Buildings other than Dwellings Carbon Neutral Dwellings Framework by 2013 EPBD/Recast EPBD (published 18/6/2010) Implementation of BER Target for `Nearly Zero Energy Buildings 2018(Public) 2020 (All Buildings) Energy Efficiency standards for New and Retrofit Buildings to Cost Optimal standards

9 Building Regulations PART 1997 Part A Structure TITLE 2004 Part C Site Preparation and Resistance to Moisture 2000 Part D Materials and Workmanship 1997 Part E Sound 2009 Part F Ventilation 2008 Part G Hygiene 1997 Part H Drainage and Waste Water Disposal 1997 Part J Heat Producing Appliances 1997 Part K Stairways Ladders Ramps and Guards 2011 Part L Conservation of Fuel and Energy - Dwellings 2008 Part L Conservation of Fuel and Energy Building other than Dwellings 2000 Part M Access for People with Disabilities

10 Evolution of Building Regulations kwh/m2/yr for typical dwelling Carbon Carbon Neutral Neutral Framework Dwellings Framework Dwellings Building Regs Building Regs Introduced Heat Introduced Heat Energy Energy Rating Rating Introduced U values improved Introduced U values improved Dwellings Dwellings Introduction of DEAP. U values improved for Introduction of DEAP. U values improved for Buildings Buildings other other than than Dwellings Dwellings 40% Improvement Dwellings 40% Introduction Improvement of NEAP Dwellings for Buildings other than Dwellings Introduction of NEAP for Buildings other than Dwellings and and Consolidation Consolidation into into SI SI of of all all previous previous Part Part L L regualtions regualtions 60% Improvement Dwellings 60% Improvement Dwellings Improvement Improvement to to Part Part L L Buildings Buildings other other than than Dwellings Dwellings A1/A2 A3B1 B2 C1 C2 D1

11 Reviews of Part F Ventilation and Part J Heat Producing Appliances Review Review of of Part Part F F for improved for improved Indoor Indoor Air Air Quality Quality IAQ IAQ Review of Review of Part Part J J Review of Review of Part Part F F as as required required

12 Principle underpinning Part L Reduce Demand for Energy through Passive Measures Increase supply from renewable and efficient sources

13 Achieving compliance with Part L Dwellings Overall Compliance Sect. 1.1 calculation in DEAP by achieving MPEPC (0.6) and MPCPC(.69) (equivalent to 40% Reduction on 2005) + Minimum Threshold Level Compliance TGD L Sections: 1.2 Renewable Energy 10kWh/m2 1.3 Building Fabric U-Values (Backstops) Thermal Bridging ACDs Air Tightness 10m3/hr/m2 1.4 Building Services Boiler Efficiency 86% Space Heating Controls (zoning and time control) Insulation Mechanical Ventilation System Efficiency 1.5 Construction Quality and Commissioning 1.6 User Information = Compliance with Part L Dwellings

14 Achieving compliance with Part L Buildings other than Dwellings Overall Compliance Sect 1.1 Compliance With NEAP MPEPC=1 MPCPC=1 + Minimum Threshold Level Compliance TGD L Buildings Other than Dwellings Sects: 1.2 Fabric 1.3 Building Services = Compliance with Part L Buildings other than Dwellings

15 DEAP Software compliance checking tool Facilitates Compliance and Self Verification Provides support verification systems e.g. HARP Database, WEPS, Air Tightness testing Increases awareness and training

16 Part L 2011 Dwellings Achieves 60% improvement on 2005 Building Regulations using DEAP compliance tool. MPEPC=0.4, MPCPC=0.46 Boiler efficiencies improved to 90% Backstop values reduced for passive measures Backstop U Values (Walls 0.27 to 0.21, Windows 2.0 to 1.6, Roof (insulation on slope) 0.20 to 0.16, Floor 0.25 to 0.21 ) Air tightness (10m3/hr/m2 to 7m3/hr/m2) Air testing clarified for individual units Appendix D Linear Thermal Transmittance Values(psi values) are published for Acceptable Construction Details to enable calculation of Heat Loss due to thermal bridging for specific dwellings Certified Thermal Modellers scheme to enable calculation of psi values for customised details DEAP review to take place as part of Part L review

17 60% Improvement on 2005 for 126m2 3 Bed Semidetached House Walls U =0.14W/m2K e.g. 150mm cavity wall with 100mm cavity insulation of thermal conductivity W/mK and 50mm insulated board of conductivity W/mK. Roof U = 0.12 W/m2K e.g. 340 mm insulation of conductivity 0.04 W/m K, between and over ceiling joists. Floor Opaque Door Windows and glazed doors Living area fraction Shading and orientation U = 0.14 W/m2K e.g. Slab-on-ground floor with 110 mm insulation of conductivity 0.023W/mK U = 1.5W/m2K Double glazed, low E (En = 0.05, soft coat) 20mm gap, argon filled, PVC frames, U=1.3w/m2K 25% of total floor area All glazing oriented E/W; average overshading

18 126m2 3 Bed Semi-detached House continued Sheltered sides 2 Thermal Bridging Internal heat Capacity category (Thermal mass) Ventilation system Air permeability Chimneys/Open Flues Extract Fans Draught Lobby Primary heating fuel (space and water) Heating system 0.05x total exposed surface area (W/m2K) Medium Natural ventilation with intermittent extract fans Infiltration due to structure = 0.25 ac/h None Three One Mains gas Boiler and radiators with energy efficient circulating pump in heated space Boiler Mains gas condensing boiler, seasonal efficiency 91.3%, room-sealed, fanned flue Heating System Controls Time and Temperature Zone Control

19 126m2 3 Bed Semi-detached House continued Hot Water System Solar water heating system with flat plate collector of aperture area = 5.5 m2, n0 = 0.6, a1 = 3.0 W/m2 K, facing SE/SW at 30 degrees and unshaded, twin coil cylinder 320 litre with 100 mm Insulation. Solar Fraction 57%. Remainder of demand met by space heating boiler, separate time control for space and water heating, cylinder temperature controlled by thermostat. Primary water heating losses Secondary space heating Low energy light fittings Insulated primary pipework between boiler and cylinder Gas fire, closed front, fan assisted, balanced flue efficiency 80% 100%

20 Result Dwelling heated by mains gas Dwelling heated by oil (with secondary heating by LPG) Primary energy [kwh/m2 yr] CO2 emissions [kg/m2 yr] EPC CPC Examples for other dwelling types available in Part L 2011 Regulatory Impact Assessment (RIA) available on DownLoad,23658,en.pdf

21 Costing Estimate over 2007 TGD L

22 Additional Cost Estimate over TGD L

23 Other supporting Part L Guidance and systems Available on Building Standards Tab DECLG/SEAI/Homebond Introduction and general theory of insulation continuity and air tightness Acceptable Construction Details -7 Parts DECLG/SEAI Heating and Domestic Hot Water Systems for Dwellings- Achieving Compliance with Part L 2008 (Review for 2011 Part L) Available from DEAP NEAP HARP Database SEAI Database of renewable products Available from NSAI IAB Window Energy Performance Scheme (WEPS) Air Tightness Testing Certification Code of practice for building services Part 1: Domestic plumbing & heating (to be published) Code of practice for building services Part 2: Solar panels (to be published)

24 Part F Ventilation Part F 2009 applies Buildings applying for Planning Permission from 1 Oct 2010 Purpose of Ventilation: Limiting moisture content within buildings condensation/ mould growth Limiting harmful pollutants indoor air quality Provides guidance for dwellings to achieve 0.5ach Natural Ventilation Mechanical Ventilation with Heat Recovery(MVHR) Mixed Mode ventilation(strategies that combine natural ventilation with mechanical ventilation and/or cooling in the most effective manner) is referenced for Buildings other than Dwellings Supporting Installation guide- Installation and Commissioning of Ventilation Systems for Dwellings Achieving Compliance with Part F to be published

25 Natural Ventilation Equivalent Area(area of sharp edged plate that passes same air volume at same applied pressure as vent being tested) of background ventilation required is based on floor area. Minimum of 30,000mm2 with an additional 5000mm2 for each 10m2 > 70m2. Additional 5000mm2 required for single storey dwellings up to 4 floors Similar equivalent areas on opposite sides to maximise cross ventilation Increase equivalent area requirement by 40% where air permeability is less than 5 m 3 /hr/m 2

26 Mechanical Ventilation with Heat Recovery 0.3l/s/m2 or 5l/s +4/s per person whichever is greater minimum capacity and boost rate based on extract rates in Table 2. (.04 Volume adjustment for air permeability) Guidance provided on installation and commissioning User information to be provided on operation and maintenance of Mechanical Ventilation with Heat Recovery

27 Installation Ref. The Federation of Environmental Trade Associations (FETA) Residential Ventilation Association CPD

28 Commissioning and User Manual

29 Energy Efficiency - What s next? Framework Framework for Review for Review Part Part L L Carbon Carbon Neutral Neutral to Buildings to Buildings other other go go for than for than Dwellings Dwellings Consultation Consultation DEHLG/NSAI/ DEHLG/NSAI/ EPBD EPBD Recast SEAI Recast SEAI Retrofit Retrofit Action Action Plan Code Plan Code of of Practice Practice consultation consultation End to End to be be developed developed Implement Implement Carbon Carbon Neutral Introduce Neutral Introduce Low Low Framework Energy Framework Energy standard standard Dwellings for Dwellings for Buildings Buildings other Introduce Introduce Recast other Than Than Recast Dwellings EPBD EPBD Cost Dwellings Cost Optimal Optimal Methodology Methodology

30 Recast EPBD Published in European Journal, June Most requirements in place under existing BER / Part L arrangements. Additional requirements include Energy Efficiency Standards in building code for new and renovated buildings to be set at cost optimal levels BER certificate ratings to be quoted in property adverts DEC requirement will broaden to include public buildings over 500m2 and some frequently visited commercial buildings (Retail, Banks, etc.) Member states to develop plans for increasing stock of low carbon / low energy buildings Public authorities to act as exemplars by promoting energy performance of buildings Use of BER in adverts and promotional material (parallel commitment in Renewed Programme for Government) to be signed into law later this year.

31 How Ireland Compares U Values required to achieve energy performance coefficient 2008 W/m2K Comparison of TGD L 2010 opaque EPC U Values to Passiv standard France Lithuania Czech Republic 0.25 Hungary Flanders Germany 2008 Poland Denmark Ireland 2008 Finland Netherlands Norway TGDL Passiv Std TGD L 2007 TGDL Passiv Std TGD L 2007 TGDL Passiv Std TGD L 0 Walls Roof Floor Source:Asiepi Comparison of Energy Performance Requirement Levels Source: SEAI GUIDELINES FOR THE DESIGN AND CONSTRUCTION OF PASSIVE HOUSE DWELLINGS IN IRELAND Asiepi study shows 2008 TGD L U values comparable to leading countries Comparison to SEAI guidelines show TGD L 2011 Opaque U values comparable to Passive House Standard

32 Thank You