Building Regulations Part L 2013 For England. Ant Wilson Director/AECOM Fellow Building Engineering AECOM

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1 Building Regulations Part L 2013 For England Ant Wilson Director/AECOM Fellow Building Engineering AECOM 1 st May 2014

2 2 Building Byelaws Thermal Insulation

3 3 Bringing in Part L 2002 Working With DETR 1995 replaced the 1990 AD Single Document 76 pages 2002 replaced the 1995 AD Two Documents L1 & L2

4 4 Building Regulations Part L (2006) With ODPM Ant Wilson, Director, Faber Maunsell

5 5 Conservation of Fuel and Power - Part L 2010

6 6 Energy Performance of Buildings - What Does It Mean For You? The EPBD drives requirements for Building Regulations, Energy Performance and Display Energy Certificates, Plant inspections. The recent recast places additional requirements on both the public and private sector to be implemented soon. Recast is 31 Articles over 16 pages And five annexes over 7 pages

7 7 EPBD Recast 2010 Articles 3-10 Article 3 Adoption of a methodology for calculating the energy performance of buildings Article 4 Setting of minimum energy performance requirements Article 5 Calculation of cost-optimal levels of minimum energy performance requirements Article 6 New buildings Article 7 Existing buildings Article 8 Technical building systems Article 9 Nearly zero-energy buildings Article 10 Financial incentives and market barriers

8 8 Article 5 - Calculation of Cost-optimal Levels Calculation of cost-optimal levels of minimum energy performance requirements 1. The Commission shall establish by means of delegated acts in accordance with Articles 23, 24 and 25 by 30 June 2011 a comparative methodology framework for calculating cost-optimal levels of minimum energy performance requirements for buildings and building elements. The comparative methodology framework shall be established in accordance with Annex III and shall differentiate between new and existing buildings and between different categories of buildings. 2. Member States shall calculate cost-optimal levels of minimum energy performance requirements using the comparative methodology framework established in accordance with paragraph 1 and relevant parameters, such as climatic conditions and the practical accessibility of energy infrastructure, and compare the results of this calculation with the minimum energy performance requirements in force.

9 9 Cost-optimal Levels for Energy Performance 14. cost-optimal level means the energy performance level which leads to the lowest cost during the estimated economic lifecycle, where: (a) the lowest cost is determined taking into account energy-related investment costs, maintenance and operating costs (including energy costs and savings, the category of building concerned, earnings from energy produced), where applicable, and disposal costs, where applicable; and (b) the estimated economic lifecycle is determined by each Member State. It refers to the remaining estimated economic lifecycle of a building where energy performance requirements are set for the building as a whole, or to the estimated economic lifecycle of a building element where energy performance requirements are set for building elements. The cost-optimal level shall lie within the range of performance levels where the cost benefit analysis calculated over the estimated economic lifecycle is positive;

10 10 Cost-optimality Calculations

11 11 EPBD Cost-optimal Solutions (To Set Regulations)

12 12 Must Review High-Efficiency Alternative Systems For new buildings, Member States shall ensure that, before construction starts, the technical, environmental and economic feasibility of high-efficiency alternative systems such as those listed below, if available, is considered and taken into account: (a) decentralised energy supply systems based on energy from renewable sources; (b) cogeneration; (c) district or block heating or cooling, particularly where it is based entirely or partially on energy from renewable sources; (d) heat pumps. 2. Member States shall ensure that the analysis of alternative systems referred to in paragraph 1 is documented and available for verification purposes. 3. That analysis of alternative systems may be carried out for individual buildings or for groups of similar buildings or for common typologies of buildings in the same area. As far as collective heating and cooling systems are concerned, the analysis may be carried out for all buildings connected to the system in the same area.

13 13 The Building Regulations 2010

14 14 Part 6 Energy Efficiency Requirement

15 15 Part 8 & Part 9

16 16 IPCC Climate Change 2013 Summary for Policymakers

17 17 Various Climate Change Indicators Snow, Ice, Oceans & Sea Levels

18 18 Atmospheric CO 2 Concentration at Mauna Loa Observatory

19 19 UK Production of Primary Fuels 1970 to DUKES 2013

20 20 UK Energy Production and Consumption 1970 to 2012 (Money)

21 21 UK Electricity Flow Chart 2012 (TWh) from DUKES 2013

22 22 Cost Optimality Depends on Fuel Prices

23 23 US Natural Gas Prices

24 24 UK Electrical Generation by Fuel Type March 2014

25 25 Half Hour Electricity Price in the UK

26 26 Building Regulations Approved Documents Amendments

27 27 Fixed Building Services Definition

28 Nearly Zero-energy Requirement for New Buildings Regulation 25B Regulation 25B Nearly zero-energy requirements for new buildings will not come into force until 2019 at the earliest. Statutory guidance on compliance with Regulation 25B is not included within this Approved Document and will be provided nearer to the time it comes into force. 28

29 29 Fabric Energy Efficiency Rates in Regulation 25 and 26A

30 30 New Building Regulations Part L Coming in on 6 th April 2014

31 31 Welsh Part L 2014 Building Regulations

32 32 Useful Flow Chart in the Welsh Version of Part L 2014

33 33 Approved Document L1A 2013 Edition

34 34 Approved Document L1A 2013 Edition - Content

35 35 Main Changes to ADL1A 2013 Fabric energy efficiency target introduced for new homes. Part L 2013 Strengthened to deliver 6% carbon dioxide savings across the new homes building mix relative to Part L 2010.

36 36 Building Regulations Part L of Schedule 1

37 37 New-Build Dwellings 2013: The Five Compliance Steps 1. Achieving the TER (Regulation 26) and the TFEE (Regulation 26A) Domestic Emission Rate (DER) Target Emission Rate (TER) and Dwelling Fabric Energy Efficiency (DFEE) Target Fabric Energy Efficiency (TFEE) 2. Limits on design flexibility 3. Limiting the effects of heat gains in summer 4. Building Performance Consistent with DER - Quality of construction & commissioning (Regulation 43 & 44) 5. Provisions for energy efficient operation of the dwelling - Providing information / O&M instructions (Regulation 40)

38 38 Building Regulations 24 and 25

39 39 Key Changes in SAP 2012

40 40 CO 2 Emission Factors by Fuel Type in SAP 2012

41 41 Approved SAP 2012 Software for Compliance and EPC Generation

42 42 Emissions Compliance Checks for Part L 2013

43 43 Consideration of High-efficiency Alterative Systems Renewable Energy Sources CHP or CCHP District Heating Heat Pumps

44 44 Consideration of High-efficiency Alterative Systems Cont. CHP or CCHP District Heating Renewable Energy Sources Heat Pumps

45 45 Regulation 27 of the Building Regulations 2010

46 47 Notional Dwelling Specification in ADL1A Fabric

47 48 Notional Dwelling Specification in ADL1A Systems

48 49 Notional Dwelling Specification in ADL1A Notes

49 50 Limits on Design Flexibility Criterion 2 (ADL1A 2013) To satisfy the TER and the TFEE rate, the building specification needs to be considerably better the stated limiting values.

50 51 Limiting Fabric Parameters (ADL1A 2013)

51 52 Comparison of English and Welsh: Criteria 2 Fabric Limits Fabric elemental backstops have been updated in Wales for 2014 Whereas in Part L 2010 the limits were advisory, they are now mandatory for Part L 2014 in Wales. The English Part L backstops continue to be advisory and same values as Part L 2010 for Part L 2013 Limiting Fabric Parameters English 2013 Welsh 2014 Roof W/m 2.K External Wall W/m 2.K Floor W/m 2.K Party Wall W/m 2.K Windows, doors, curtain walling W/m 2.K Air permeability m 3 /hr.m 10 10

52 53 Limiting System Efficiencies (ADL1A 2013) Domestic Building Services Compliance Guide Fixed Building Services

53 54 Criterion 3 Changes: Limiting the Effects of Heat Gains in the Summer Change in title stresses that it is not just solar gains that need to be controlled during the summer period It highlights the need to insulate circulation pipes for domestic hot water For example: feedback is that in apartment blocks, poorly insulated pipes in communal areas can contribute to overheating This guidance is in the Domestic Building Services Compliance Guide Note: The Government is investigating more widely the causes and impact of overheating in a changing climate and potential policy options

54 55 Criterion 4 - Air Permeability and Pressure Testing

55 56 Criterion 4 - Commissioning in ADL1A 2013

57 Criterion 5 Changes: Provision of Information Provides more details of what this information should contain Content: Explanation of essential design principles and key features Floor plans to show

56 57 Criterion 5 Changes: Provision of Information Provides more details of what this information should contain Content: Explanation of essential design principles and key features Floor plans to show main heating and ventilation components Explain how to operate, control and maintain building services and LZCs Signpost other key information that should be provided including appliance manuals, EPC recommendation report

57 ADL1A Example Routes to meet the TER and TFEE - End Terrace 76m 2 Ground Floor First Floor 58

58 59 Typical CO 2 Emissions from 76m 2 Part L 2013 End of Terrace House

59 60 Example Routes to Meet the TER and TFEE for End Terrace 76m 2

60 ADL1A Example Compliance Routes for Detached House 118m 2 Ground Floor First Floor 61

61 62 Annual Energy use in End of Terrace and Detached Home

62 63 ADL1A Example Compliance Routes for Detached House 118m 2 Appendix R Detached Detached Relaxed Fabric + Relaxed Fabric + Elemental Recipe PV SHW Ext. Walls (W/m²K) Party Walls (W/m²K) Floor (W/m²K) Roof (W/m²K) Windows (W/m²K) Air tightness (m³/hr.m²) Gas boiler 89.5% (SEDBUK) 89.5% (SEDBUK) 89.5% (SEDBUK) Services 0.48 kwp PV SHW TER (kgco 2 /m 2.yr) DER (kgco 2 /m 2.yr) <17.3 TFEE (kwh/m 2.yr) DFEE (kwh/m 2.yr)

63 64 Example Routes to Meet the TER and TFEE 2 Bed Flat 67m 2

64 65 2 bed Top Floor Flat 67m 2 - Base Case % Glazing Test Large Top Floor Flat (corner) Recipe Specification (NE orientation) Glazing % TFA 25% 35% 45% Glazing % Facade [inc. Doors] 42% 58% 75% External Wall (W/m²K) Windows (W/m²K) Frame Factor G value TER (kgco 2 /m 2.yr) DER (kgco 2 /m 2.yr) TFEE (kwh/m 2.yr) DFEE (kwh/m 2.yr)

65 66 Domestic Building Services Compliance Guides 2013 Editions

66 67 Domestic Building Services Compliance Guide 2013 Edition

67 68 Summary of Domestic Recommended Energy Efficiency Standards

68 69 Heat Pumps, Comfort Cooling and Solar Water Heating

69 Minimum Standards for Fixed Internal & External Lighting

70 71 Approved Document L2A 2013 Edition

71 72 Content of Approved Document L2A 2013

72 73 Main Changes to Approved Document L2A 2013 Part L 2013 Strengthened to deliver 9% carbon dioxide savings across the new non-domestic building mix relative to Part L 2010.

73 74 Achieving the Target Emission Rate ADL2A 2013

74 75 BRE Modifications to SBEM for Version 5.2.a

75 76 Five Criteria for Part L2A Compliance 2013 in England 1. Building Emission Rate Target Emission Rate (Regulation 26) 2. Limits on design flexibility 3. Limiting the effects of solar gains in summer 4. Quality of construction & commissioning (Regulation 43 & 44) 5. Providing information / O&M instructions (Regulation 40)

76 77 Notional Non-domestic Fabric Building Specification ADL2A 2013

77 78 Notional Non-domestic Air Permeability Building Specification ADL2A

78 79 Notional Non-domestic Systems Building Specification ADL2A 2013

79 80 isbem v5.2b for England

80 81 Limiting Fabric Parameters in ADL2A 2013

81 82 Limits on Design Flexibility Criterion 2 ADL2A

82 83 Limiting the Effects of Heat Gains in Summer

83 84 Looking Forward CIBSE TM36:2005, TM37:2006 &TM48:2009

84 85 Energy Meters in ADL2A 2013

85 86 Building Log Books CIBSE TM31 and BSRIA BG26/2011

86 87 BSRIA BG 26 / 2011 Building Manuals and User Guides

87 88 ADL2A Example 1: Air-conditioned Office Element Notional Building Improve Lighting Include PV Roof U-value (W/m 2.K) Wall U-value (W/m 2.K) Floor U-value (W/m 2.K) Window U-value (W/m 2.K) 1.6 (10% FF) 1.8 (10% FF) 1.8 (10% FF) G-Value (%) 40% 55% 55% Lighting Efficacy (lm / cw) PV Array (kw(p)) TER (kgco 2 /m².yr) BER (kgco 2 /m².yr) Note: Gross internal area = 12,000m² All other values as per Notional building specification

88 89 ADL2A Example 2: Distribution Warehouse Element Notional Building Improve Air Permeability Include PV Roof U-value (W/m 2.K) Wall U-value (W/m 2.K) Floor U-value (W/m 2.K) Air-permeability (m 3 /m 2 /hour) Lighting Efficacy (lm / cw) PV Array (kw(p)) TER (kgco 2 /m².yr) BER (kgco 2 /m².yr) Note: Gross internal area = 5,000m² All other values as per Notional building specification

89 90 Non-domestic Building Services Compliance Guides 2013 Editions

90 91 Non-domestic Building Services Compliance Guide 2013 Edition

91 92 Gas, Oil and Biomass-fired Boilers Non-domesic BSCG 2013

92 93 Minimum Boiler Seasonal Efficiency

93 94 Minimum Controls Packages for New Boilers

94 95 Minimum Boiler Efficiency and Controls in Existing Buildings

95 96 Heat Pump Test Standards

96 97 Maximum Heat Losses from DHW Storage Vessels

97 98 Comfort Cooling in Non-domestic Compliance Guide 2013

98 99 Minimum Energy Efficiency Ration for Comfort Cooling

99 100 Non-domestic Compliance Guide for Air Distribution 2013

100 101 Specific Fan Powers in New and Existing Buildings 2013 &

101 102 Minimum Control for Non-domestic Air Distribution Systems

102 103 Non-domestic Lighting

103 104 Lighting Controls in New and Existing Buildings

104 105 Lighting Energy Numerical Indicator (LENI)

105 106 Pipework and Ductwork Insulation Requirements

106 107 Maximum Heat Losses From Heating Pipes

107 108 Maximum Heat Gains For Cooled Water Supplies

108 109 Guidance on Water Pumps and Circulators

109 110 Existing Dwellings ADL1B No change in energy efficiency standards for works on existing dwellings Some modifications to the technical guidance as requested by industry to aid clarity, provide flexibility and align with current practice

110 111 Changes to ADL2B No change to the fabric standards for replacement or renovation Changes to Non-Domestic Building Services Compliance Guide

111 112 The ADL1B and ADL2B are now Complete New Table 3 in ADL2B New Table 1 in ADL1B

112 113 DCLG s Part L 2013 Transitional Arrangements The introduction of the new Part L 2013 target is subject to the transitional provisions in Regulation 9. In brief, these mean: Where building work has commenced on site before 6 th April 2014 the provisions on target energy efficiency rates will not apply; and Where a building notice, full plans submission or initial notice has been given to a local authority before 6 th April 2014 the provisions on target fabric energy efficiency rates will not apply so long as work is commenced on site before 6 th April 2015.

113 114 Transitional Arrangements - Commencement of work In DCLG s opinion the commencement of work would usually be marked by work such as: Excavation for strip or trench foundations or for pad footings; Digging out and preparation of ground for raft foundations; Vibrofloatation (stone columns) piling, boring for piles or pile driving; Drainage work specific to the building(s) concerned.

114 115 Part L 2013 Transitional Arrangements DCLG considers that the following sorts of work would not be likely to constitute the commencement of work: Removal of vegetation, top soil or removal/treatment of contaminated soil; Demolition of any previous buildings on the site; Excavation of trial holes; Dynamic compaction; General site servicing works (e.g. roadways). In some cases applications will be for a number of buildings on a site, for example a number of houses. In such cases it is the commencement of work on the first of the buildings within the application which determines whether all the building work can take advantage of the transitional provisions, not each individual building.

115 THANK YOU FOR LISTENING 116

The Driver for Building Regulations on Energy Efficiency. Ant Wilson FREng, FCIBSE, FEI Director/AECOM Fellow Building Engineering AECOM

The Driver for Building Regulations on Energy Efficiency Ant Wilson FREng, FCIBSE, FEI Director/AECOM Fellow Building Engineering AECOM 23 rd September 2015 2 CIBSE HNNW - Disclaimer The following material