ENERGY AND SUSTAINABILITY STATEMENT

Transcription

1 ENERGY AND SUSTAINABILITY STATEMENT Plot 12, Phase 1B (South) Reserved Matters Application Brent Cross South Limited Partnership October 2017

2 Contacts Brent Cross South Limited Partnership 4 Stable Street London N1C 4AB Sweco 1 Bath Road Maidenhead, Berkshire SL6 4AQ Buro Happold Ltd. 17 Newman Street London W1T 1PD

3 Energy and Sustainability Statement Brent Cross South - Plot /GC/ Report Prepared For: Brent Cross South Limited Partnership DRAFT

4 Issue Date Reason for Issue Prepared Checked Approved 00 August/2017 For Design Team Comment GC 21/07/17 KA 04/08/17 EV 04/08/17 01 September/2017 For RMA (Draft) GC 15/09/17 KA 15/09/17 EV 15/09/17 02 October/2017 For RMA submission GC 05/10/17 KA 06/10/17 EV 06/10/17 03 October/2017 For RMA submission GC 12/10/17 KA 12/10/17 EV 12/10/17 04 October/2017 For RMA submission KLA 13/10/17 KA 13/10/17 EV 13/10/17 05 October/2017 For RMA submission KLA 13/10/17 KA 13/10/17 EV 13/10/17 Energy and Sustainability Statement /GC/ Sweco 1 Bath Road Maidenhead Berkshire SL6 4AQ +44 (0) building.services@sweco.co.uk Sweco 2016 This document is a Sweco confidential document; it may not be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, photocopying, recording or otherwise disclosed in whole or in part to any third party without our express prior written consent. It should be used by you and the permitted discloses for the purpose for which it has been submitted and for no other. Registered Office: Sweco UK Limited, Grove House, Mansion Gate Drive, Leeds, LS7 4DN. Company Registration No

5 Contents 1. Executive Summary Energy Strategy Compliance Part L Energy Strategy Compliance Part L Sustainability Strategy Compliance Introduction Purpose of the Report Development Description Methodology Development Commitments Section 73 Permission & Revised Energy Strategy (RES) BXC01 Revised Development Specification & Framework (RDSF) Baseline Carbon Emissions (TER) Be Lean Reducing Energy Demand Passive Design Features: Regulated Energy Use Active Design Features: Regulated Energy Use Active Design Features: Unregulated Energy Use Fabric Energy Efficiency (Part L1A 2013) Be Clean Heating Infrastructure Be Green Renewable Energy Carbon Savings Residential Areas Non-domestic Areas Sustainability Statement Water Rainwater Plot Conclusion Appendices Appendix A SAP Calculations Appendix B BRUKL Report Appendix C BREEAM Pre-assessment Appendix D CfSH Pre-assessment Appendix E RDSF extract, Appendix 11 Appendix F Buro Happold s Technical Note on the Site-wide Energy Strategy Appendix G Overheating Assessment Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

6 01 Executive Summary 1. Executive Summary This report has been prepared by Sweco UK on behalf of BXS Limited Partnership (BXS LP) to support a Reserved Matters Application for Plot 12 and the adjacent streets and public realm. Plot 12 is a mixed use development for 292 residential units and ancillary housing office, retail, café, basement, car parking and plant with associated landscaping, access and layout. The redevelopment of Brent Cross South (BXS) stretches from the North Circular (A406) to Cricklewood Lane, between Hendon Way (A41) and the Edgware Road (A5). It will deliver circa 6,700 homes and workspace for over 20,000 new jobs; a new high street, with local shops and restaurants; improved transport connections with the new station serving the development and better walking and cycle routes; and new and enhanced parks and square, and community facilities. This document presents the scope of the Energy and Sustainability Strategies of Plot 12 at BXS, within Brent Cross Cricklewood Regeneration Area, taking into consideration the Section 73 conditions and commitments from the approved BXC Revised Energy Strategy applicable to the plot development, summarised below: All dwellings to achieve minimum Level 4 under Code for Sustainable Homes (s73, Condition 35.1); All commercial spaces to achieve at least Very Good rating under BREEAM (s73, Condition 35.2); 40% reduction on carbon emissions over Building Regulations Part L 2010 for residential buildings (Revised Energy Strategy and s73, Condition 35.6); 25% reduction on carbon emissions over Building Regulations Part L 2010 for nondomestic buildings (Revised Energy Strategy and s73, Condition 35.6); All elements to comply with relevant version of Part L as appropriate at the point of design construction, e.g. Part L 2013 (Revised Energy Strategy); and All principal residential buildings connect to the district heat network, where feasible to do so (Revised Energy Strategy). Following the energy and carbon evaluation it is proposed that extensive energy efficiency measures along with low and zero carbon (LZC) applications will be incorporated into the designs for the development. Energy and carbon calculations have confirmed that the proposed energy efficiency design and LZC application will achieve: - Regulated carbon dioxide savings of 31.2% relative to a New-Build Part L2A 2010, for the non-residential areas - Regulated carbon dioxide savings of 17.9% relative to a New-Build Part L2A 2013, for the non-residential areas; The energy assessment has been carried out using the methodology outlined in the Energy Planning: Greater London Authority (GLA) guidance on preparing energy assessments, March 2016 and The London Plan, Chapter 5, March 2016 consolidated with alterations since The London Plan energy hierarchy in Policy 5.2 is as follows: 1. Be lean: Use less energy 2. Be clean: Supply energy efficiently 3. Be green: Use renewable energy The following sections demonstrate compliance with the energy hierarchy and the carbon targets proposed set out by the 2014 outline planning permission (referred to here as the S73 Permission) and BXC Revised Energy Strategy. 1.1 Energy Strategy Compliance Part L 2010 This section details the compliance against the previous Building Regulations: Part L 2010 to confirm that the targets set out by the BXC Revised Energy Strategy can be achieved within the individual plots. Table 1 Carbon dioxide emissions after each stage of the energy hierarchy for domestic areas Residential Areas Base line: Part L 2010 of the Building Regulations Compliant Development Carbon Dioxide Emissions for Residential Areas (Tonnes CO2 per Annum) Regulated Energy After energy demand reduction After heat network / CHP After renewable energy Regulated Clean carbon dioxide savings of 48% relative to a New-Build Part L1A 2010, for the residential areas; - Regulated Lean carbon dioxide savings of 7.1% relative to a New-Build Part L1A 2013, for the residential areas; Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

7 01 Executive Summary Table 2 Regulated carbon dioxide savings from each stage of the Energy Hierarchy for domestic areas Table 5 Regulated carbon dioxide savings from each stage of the Energy Hierarchy for domestic areas Residential Areas Savings from reduced energy demand Regulated Carbon Dioxide Savings (Tonnes CO 2 per Annum) (%) % Saving from heat network / CHP % Savings from renewable energy % Total cumulative on site savings % Total Target Savings RMA (S73) % Regulated Annual Surplus 26.5 Non-Domestic Areas After heat network / DH network CHP Regulated Carbon Dioxide Savings (Tonnes CO 2 per Annum) (%) % Cumulative on site savings % Total Target Savings (s73) % Regulated Annual Surplus 4.56 Table 6 Shortfall in regulated dioxide savings for domestic areas Table 3 Shortfall in regulated dioxide savings for domestic areas Non-Domestic Areas Annual Shortfall Tonnes CO 2 (Regulated) Residential Dwellings Annual Shortfall Tonnes CO 2 (Regulated) Shortfall 0.00 Shortfall 0.00 Table 4 Carbon dioxide emissions after each stage of the energy hierarchy for non-domestic areas Non-Domestic Areas Base line: Part L 2010 of the Building Regulations Compliant Development After heat network / DH network CHP Carbon Dioxide Emissions (Tonnes CO 2 per Annum) Regulated Energy Unregulated Energy Note 1: Carbon factor of 0.11 kg CO₂/kWh has been applied to Part L2A compliance check dynamic thermal modelling. Carbon factor has been calculated by Buro Happold District Heating Energy Consultants Date 9 th October (Key Contact Mr Robert Ford Buro Happold, London Office) The set up within PartL2A Compliance the target or base line Part L2A Compliant carbon emission rating differs for the same building for with and without District heating network set-up. Reference to NCM Modelling guide Part L2A 2010 clause 52 which outlines the Part L2A Compliance check with district heating, the Actual & Notional Building will use the same kg CO₂/kWh factor calculated for the district heating system. Therefore there is no real Lean building as notional building requires district heating carbon factor to be applied. (It is to be noted the reduction in CO₂ emissions are attributed to the low carbon district heating network design.) Note 2: The negative value shown in Table 2 for the LEAN result under 2010 regulations indicates that the main energy centre boilers alone do not achieve the carbon reductions, however as shown the addition of the CHP for CLEAN do pass 2010 building regulations. Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

8 01 Executive Summary 1.2 Energy Strategy Compliance Part L 2013 This section details the compliance against current Building Regulations: Part L Table 7 Carbon dioxide emissions after each stage of the energy hierarchy for domestic areas Residential Areas Base line: Part L 2013 of the Building Regulations Compliant Development Carbon Dioxide Emissions (Tonnes CO 2 per Annum) Regulated Energy After energy demand reduction After heat network / CHP After renewable energy Table 10 Carbon dioxide emissions after each stage of the energy hierarchy for non-domestic areas Non-Domestic Areas Base line: Part L 2013 of the Building Regulations Compliant Development Carbon Dioxide Emissions (Tonnes CO 2 per Annum) Regulated Energy Unregulated Energy After energy demand reduction Table 11 Regulated carbon dioxide savings from each stage of the Energy Hierarchy for nondomestic areas Table 8 Regulated carbon dioxide savings from each stage of the Energy Hierarchy for domestic areas Residential Areas Savings from reduced energy demand Regulated Carbon Dioxide Savings (Tonnes CO 2 per Annum) (%) % Saving from heat network / CHP % Savings from renewable energy % Total cumulative on site savings % Non-Domestic Areas Savings from reduced energy demand Regulated Carbon Dioxide Savings (Tonnes CO 2 per Annum) Table 12 Shortfall in regulated dioxide savings for non-domestic areas Non-Domestic Areas (%) % Annual Shortfall Tonnes CO 2 (Regulated) Shortfall 0.0 Compliance with current Building Regulations Approved Document L YES Please refer to Note 1 on page 6. Table 9 Shortfall in regulated dioxide savings for domestic areas Residential Dwellings Annual Shortfall Tonnes CO 2 (Regulated) Shortfall 0.0 Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

9 01 Executive Summary 1.3 Sustainability Strategy Compliance As set out by Conditions 35.1 and 35.2 of the S73 Permission, all residential units will achieve a minimum standard of Code for Sustainable Homes Level 4, and the commercial units will achieve a minimum of BREEAM Very Good at Plot 12. Moreover, Paragraph 2.71 of the Revised Development Specification and Framework ( RDSF ) stipulates that the following Water Use Principles should be met through the detailed design of development: residential developments will be designed to achieve a water usage of 105 litres/person/day (38.3 cubic metres / person / year; equivalent to the requirement for a 4-star rating using the Code for Sustainable Homes), with an aspiration of meeting the target of 80 litres/person/day (29.2 cubic metres/person/year, equivalent to the minimum requirement for a 5-star rating using Code for Sustainable Homes); rainwater harvesting will be designed to capture 10% of rain falling on the site for irrigation and cleansing use, and grey water will be recycled from commercial buildings, if that proves necessary to meet demand; water metering will be installed in all buildings and leak detection systems in commercial buildings; low water use fittings/appliances and A rated white goods will be a requirement in all residential development; and water butts will be provided in residential buildings with individual gardens or suitable balconies. Plot 12 will comply with Conditions 35.1 and 35.2, also the sustainability features outlined in Table 9 of the RDSF will be implemented where applicable within the development. Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

10 02 Introduction 2. Introduction 2.1 Purpose of the Report Planning Permission Ref No. C/17559/08 for the comprehensive redevelopment of the Brent Cross Cricklewood ( BXC ) regeneration area was granted in October 2010 (the 2010 Permission ). A Section 73 Permission Ref No. F/04687/13 to develop land without complying with conditions attached to permission Ref No. C/17559/08 was granted by the London Borough of Barnet on 23 July 2014 ( S73 Permission ). The S73 Permission includes a number of planning conditions related to energy. A Revised Energy Strategy (RES) (Ref No 14/08106/CON) pursuant to Planning Condition 35.6 attached to the S73 Permission was approved by London Borough of Barnet in July 2015 and sets out how the BXC redevelopment will achieve reduction in carbon emissions of: 40% below Building Regulations Part L 2010 for residential and 25% below Building Regulations Part L 2010 for non-domestic buildings. Planning condition 35.6 was triggered consequentially following the findings of the studies undertaken in response to planning conditions 35.3 refuse derived fuel feasibility study, and 35.4 Alternative renewable fuel feasibility Study. Planning condition 35.3 found the preferred strategy from the S73 Permission BXC 09 Revised Energy Statement of using a refuse derived fuel (RDF) powered Combined Heat and Power (CHP) plant to be neither feasible nor viable at present. This triggered Planning Condition 35.4 which investigated the feasibility of using an alternative renewable fuel (ARF). Planning condition 35.4 required undertaking a study to examine the possibility of fuelling a scheme wide CHP using alternative renewable source(s). Work undertaken pursuant to condition 35.4 found that use of Biodiesel to fuel CHP plant is technically feasible but not financially viable for the BXC development. Planning condition 2.1 requires that reserved matters applications (RMAs) are accompanied by a document which identifies compliance with the RES. Planning condition 35.7 requires that RMAs for plot development comprising residential units demonstrate compliance with the RES, unless and to the extent that such compliance is demonstrated to be unfeasible in respect of particular plots. This must be discharged as part of each RMA containing any residential development. This report describes the various options for energy and carbon reduction and sustainability strategies at Brent Cross South Plot 12, BXC Regeneration Area, setting out how it complies with S73 Permission, commitments and current policies applicable to the development. Any issues or conditions related to the site-wide masterplan design are excluded from this document. Conditions attached to the S73 Permission, particularly from section 35. Energy & Sustainability ; BXC01 Revised Development Specification & Framework (RDSF) dated from October 2013; and Revised Energy Strategy (RES), Ref. 14/08106/CON, approved by London Borough of Barnet in July The figures presented in this report are calculated for the purpose of initial estimates only, using the preliminary information currently available. Hence whilst they can be used to gain an understanding of the benefits of each technology, they must not be taken out of context; establishing the best economic and energy efficient operation will require more complex analysis of building projected load profiles when these are developed. 2.2 Development Description Plot 12 is a mixed use development for 292 residential units and ancillary housing office, retail, café, basement, car parking and plant with associated landscaping, access and layout. The site principally comprises two distinct buildings (A North and South block). Both buildings will be predominantly residential with mixed use at the lower levels. It is proposed that the North block will house the relocation of the Whitefield Estate. The South block will generally comprise of market side units. A single shared level of basement is proposed to house car parking, cycle provision and plant. Circa 126 no. of car parking spaces are envisaged, split between both buildings. Table 2-1 Proposed Area Schedule Use Gross Internal Area (m 2 ) No. of units Residential totals Building 12N Building 12S 28,522 12,362 16,161 Building 12N Retail (A1) Building 12S Café (A3) Ancillary Housing Office (Building 12N) Note: Refer to Maccreanor Lavington s area schedule for detailed area and housing mix. In summary, the Energy and Sustainability Strategy Compliance for Plot 12 will conform to the commitments and conditions set out by the following documents: Energy and Sustainability Statement Brent Cross Plot /GC/ of 36

11 02 Introduction Figure 2-1 Site Location Plan indicating in red the RMA boundary of Plot 12 Figure 2-2 Illustrative Masterplan Parameter Plans, plot 12 highlighted in dotted yellow line (adapted from Allies & Morrison Architects) Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

12 02 Introduction 2.3 Methodology Accredited SAP software was used to establish the baseline regulated and unregulated carbon emissions of the residential areas of the development. Sweco UK uses Integrated Environmental Systems (IES) VE Compliance software as an accredited software for dynamic simulations. The IES VE Compliance software has been approved by the Department for Communities and Local Government (DCLG) for use as a Dynamic Simulation Model (DSM) software package. As part of its approval process, the IES software had to demonstrate that it satisfies all of the tests and other requirements defined in accordance with ISO 90003:2004 Guidelines for the application of ISO 9001:2000 to computer software. Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

13 03 Development Commitments 3. Development Commitments 3.1 Section 73 Permission & Revised Energy Strategy (RES) The S73 Permission (Reference F/04687/13), which was granted 23 July 2014, had a number of conditions attached to ensure that the outline planning commitments are met. Condition No. 35 specifically relates to Energy and Sustainability and the requirements of this condition are outlined below. Condition 35.1: All residential units shall achieve a minimum standard of Code Level 4 of the Code for Sustainable Homes overall with a view to obtaining higher levels in later phases. Condition 35.2: All commercial units shall achieve a minimum standard of BREEAM Very Good. Condition 35.6: If a Refuse Derived Fuel fuelled scheme for the onsite scheme-wide CHP is shown in the RDF Feasibility Study submitted in accordance with Condition 35.3 (or the alternative feasibility study submitted and approved in accordance with Condition 35.4) to not be feasible the developers shall not begin the Development unless and until they shall have prepared the Revised Energy Strategy (in consultation with the Energy Panel, LPA and the GLA) and shall have submitted to the LPA and obtained the LPA s approval to the Revised Energy Strategy. The Revised Energy Strategy shall demonstrate how the minimum reduction in carbon emissions below the standard set out in Building Regulations Part L 2010 of 40% and 25% for residential and non-domestic buildings respectively will be achieved using fuel other than Refuse Derived Fuel, prior to the submission of any Reserved Matters Application. All relevant Reserved Matters Applications and/or Other Matters Applications shall thereafter be required to demonstrate (in accordance with Condition 2.1) compliance with the Revised Energy Strategy. Condition 35.7: All relevant Reserved Matters Applications for Plot Development comprising residential units shall thereafter be required to demonstrate (in accordance with Condition 2.1) compliance with the Energy Strategy as confirmed by the RDF Feasibility Study (conducted under Condition 35.3) or the feasibility report in relation to alternative renewable sources feasibility study (to be conducted under Condition 35.4) or (as appropriate) the Revised Energy Strategy (to be conducted under Condition 35.6) unless and to the extent that such compliance is demonstrated to be Unfeasible in respect of particular Plots. Conditions 35.3, 35.4 and 35.5 are related to the site-wide energy strategy and refuse derived feasibility study for the scheme-wide CHP design. Conditions 35.3 and 35.4 have been discharged (ref. 14/07893/CON and 14/07959/CON, respectively) and consequently Condition 35.5 is not relevant. Condition 2.1 sets out the required documents to accompany a RMA. Part (h) of condition 2.1 requires a Sustainability Report to accompany any RMA and this document addresses this. Condition 2.1 Part (h) Sustainability: (i) Sustainability/energy statement and such other material as it necessary to demonstrate that such Reserved Matters Application or Other Matters Application accords with the relevant principles and carbon saving targets identified in Condition 35.1, and 35.2; - it is this document. (ii) a statement to demonstrate the feasibility of linking into the site wide CHP network and the District Heating Network as detailed in Condition 35.3; - refer to section 6. (iii) details for linking the relevant Phase, Sub-Phase, Plots or Plots into the Vacuum Waste Collection System (where appropriate) if that system is found to be reasonably practicable in the VWCS Feasibility Study as approved in accordance with Condition 1.24; - Plot 12 will not be connected to the VWCS (iv) Compliance with the Energy Strategy or (if appropriate) the Revised Energy Strategy approved under Condition refer to Appendix F Buro Happold s Technical Note on the Site-wide Energy Strategy for further details on the RES and section 7 of this report showing Plot level compliance. In conclusion, the S73 Permission and RES commitments for Plot 12 are: All dwellings to achieve minimum Level 4 under Code for Sustainable Homes; All commercial spaces to achieve at least Very Good rating under BREEAM; 40% reduction on carbon emissions over Building Regulations Part L 2010 for residential buildings; 25% reduction on carbon emissions over Building Regulations Part L 2010 for nondomestic buildings; All elements to comply with relevant version of Part L as appropriate at the point of design construction (e.g. Part L 2013); and All principal residential buildings connect to the district heat network, where feasible to do so. 3.2 BXC01 Revised Development Specification & Framework (RDSF) Section 2 sets out key site-wide principles and environmental standards to which each individual plot will need to comply with. The key measures relevant to sustainability are outlined in paragraph 2.71: Water Principles, accompanying Table 9: Sustainability Features Delivered by Developers of Individual Sites within the same section of the RDSF and Appendix 11 (refer to extract within Appendices). Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

14 03 Development Commitments The Water Use Principles contained in Paragraph 2.71 from the RDSF should be met: Paragraph 2.71 of RDSF: The Development Partners will ensure that potable water use from mains is minimised by an efficient water distribution system and reduction of demands. The following key measures will be incorporated into detailed designs: residential developments will be designed to achieve a water usage of 105 litres/person/day (38.3 cubic metres / person / year; equivalent to the requirement for a 4-star rating using the Code for Sustainable Homes), with an aspiration of meeting the target of 80 litres/person/day (29.2 cubic metres/person/year, equivalent to the minimum requirement for a 5-star rating using Code for Sustainable Homes); rainwater harvesting will be designed to capture 10% of rain falling on the site for irrigation and cleansing use, and grey water will be recycled from commercial buildings, if that proves necessary to meet demand; water metering will be installed in all buildings and leak detection systems in commercial buildings; low water use fittings/appliances and A rated white goods will be a requirement in all residential development; and water butts will be provided in residential buildings with individual gardens or suitable balconies. Plot 12 will comply with Conditions 35.1 and 35.2, will meet the Water Principles and implement other sustainability features outlined in Table 9, in section 2 of the RDSF where applicable within the development. Table 9: Sustainability Features Delivered by Developers of Individual Plots within BXC (RDSF, October 2013) Topic Materials Operational Waste Energy & CO2 emissions strategy Water Resource Efficiency Feature Implement Construction Environmental Management Plans Undertake pre-demolition audits for all buildings Reuse at least 70% demolition arisings, audited using ICE Demolition Protocol Follow CoCP (Code of Construction Practice) Register each contract under the Considerate Constructors Scheme 90% of timber to be obtained from a sustainable source Forest Stewardship Council (FSC) Use no peat or natural weathered limestone Use materials selected from A to C options in the BRE s Green Guide to Specification (BRE, 2009). Construction materials will have at least 10% recycled content (by value); audited using the WRAP Recycled-Content Toolkit. Avoid using materials that deplete the Ozone layer and that contribute to global warming. All residential buildings will be designed, and infrastructure provided, to allow for recycling or composting of at least 40% of household waste. All commercial buildings will be designed, and infrastructure provided, to allow for recycling or composting of at least 60% of commercial waste. Residential buildings to achieve a minimum of 40% reduction in carbon emissions below that required under Building Regulations Part L 2010 & Commercial Buildings to achieve a minimum of 25% reduction in carbon emissions below that required under Building Regulations Part L Achieve a reduction in carbon emissions by use of renewable or low carbon energy sources. Water use in residential buildings to be less than 105 litres per person per day. Water use in commercial office buildings to be less than 20 litres per full-time employee per day. Install water metering in all buildings. Install leak detection systems in commercial buildings only. Install low-water-use fittings / appliances, where fitted by the developer. Install A-rated appliances (white goods), where fitted by the developer. Reuse grey water from commercial buildings if there are appropriate uses. Provide water butts in residential buildings with gardens or suitable balconies. Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

15 03 Development Commitments Topic Building Environmental Performance Targets Open Space / Public Realm Feature Commercial office buildings to achieve at least Very Good rating using BREEAM New Construction (2011), with an aspiration for Excellent Residential buildings to achieve at least Code for Sustainable Homes 4 with an aspiration for higher. All residential development should meet Lifetime Home standards and 10% of units should meet wheelchair accessibility standards All residential development should meet Lifetime Home standards and 105% of units should be designed to be wheelchair accessible or easily adaptable for residents who are wheelchair users (London Plan Policy 3.8). Residential development to achieve BS 8233:1999 good standard for external to internal noise where practicable, reasonable standard elsewhere. Residential development to improve on Building Regulations (2003) Part E for internal sound transmission standards by 5dB (as defined in the Code for Sustainable Homes) except where unavoidable external noise intrusion renders this of no additional value. Buildings will be fully e-enabled. Brown or green roofs on 10% of the available roof area, where these secure ecological or amenity benefits. Building / occupier-specific Travel Plan and Travel Plan Coordinator. Provide facilities for bicycles (storage) and electric vehicles (charging points). Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

16 04 Baseline Carbon Emissions (TER) 4. Baseline Carbon Emissions (TER) The 'baseline' building represents a development which just meets the minimum standards of CO2 emissions reduction (i.e. the Building Emissions Rate (BER) is equal to the Target Emissions Rate (TER), as defined by Part L of the Building Regulations 2013). Allowances for energy consumption not included under Part L have been made by reference to published material or by calculation. These include small power (energy use for electrical appliances). The energy breakdown and carbon dioxide emissions are shown in the table below. As part of the study for the commercial areas of the building, a thermal model of the building was developed and analysed using the approved IES Virtual Environment (VE) Software (Version 7.0.7). This software models the carbon dioxide emission rates produced by a building in accordance with Part L2A of the Building Regulations (2010 and 2013). The software is approved for use by the Department for Communities and Local Government (DGLG) as a Dynamic Building Simulation Modelling Package (DSM). Table 4-2 Target Emissions Part L 2013 Baseline: Part L 2013 of the Building Regulations Compliant Development Carbon Dioxide Emissions (Tonnes CO2 per Annum) Regulated Energy Domestic Buildings (Part L1A 2013) Non-Domestic Buildings (Part L2A 2013) 71.2 For the residential units, SAP calculations were carried out using an approved NHER tool, by an accredited energy assessor. Unregulated energy use and the associated carbon dioxide emissions for the nondomestic buildings has been calculated using CIBSE publications for guidance, as well as evidence established through previous development work. Both sets of results, regulated and unregulated energy have been combined to form the tables below. Unregulated energy use and the associated carbon dioxide emissions for the domestic buildings have been based on a typical apartment energy use for cooking and domestic appliances for a whole year. Table 4-1 Target Emissions Part L 2010 Carbon Dioxide Emissions (Tonnes CO2 per Annum) Baseline: Part L 2010 of the Building Regulations Compliant Development Regulated Energy Domestic Buildings (Part L1A 2010) Non-Domestic Buildings (Part L2A 2010) 73.9 Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

17 05 Be Lean Reducing Energy Demand 5. Be Lean Reducing Energy Demand Energy efficient servicing strategies and equipment will be used throughout the development to reduce energy demand. Technologies employed include: 5.1 Passive Design Features: Regulated Energy Use Building Envelope Residential Areas The external envelope of a building can act as an important climatic modifier, with a welldesigned façade significantly reducing the buildings energy demand. The residential façade system will be designed to minimise energy requirements and improve thermal comfort. The Fabric Energy Efficiency (FEE) of dwellings is assessed using SAP 2009/2012. The FEE is a measure of the primary energy associated to heating and cooling within dwellings. The proposed characteristics for U-values and air permeability for new buildings should be significantly better than the minimum standards as set out by Part L1A. Table 5-1 Proposed Building Thermal Envelope U-values Residential Areas Parameter Part L1A Limiting Values % Improvement over PartL1A Target Values Building Air Tightness 50pa 70% 3 50pa 1 Thermal Bridging (y-value) 0.15 W/m 2.K W/m 2.K Note 2,5 Thermal Mass 250 kj/m 2.K N/A 250 kj/m 2.K (medium) U-values External Walls 0.30 W/m².K 56% 0.13 W/m².K Roof 0.20 W/m².K 50% 0.10 W/m².K Exposed/ Ground Floor 0.25 W/m².K 60% 0.10 W/m².K Party Walls W/m 2.K N/A 0.0 W/m 2.K Parameter Part L1A Limiting Values % Improvement over PartL1A Target Values Glazing Lighting Transmittance N/A N/A 65% Notes: 1. The design air permeability of 3 will be subject to an increase of 2.0 as described in section 2.9 of AD Part L1A for all apartments which are not pressure tested. The energy model assumes that 100% of apartments will be air pressure tested. 2. This assumes default thermal bridging value. 3. For the purposes of SAP, party walls are considered to be those that are adjacent to other spaces that are assumed to be heated to the same level as the dwelling; this includes foyers, corridors, risers, stairwells and common areas. 4. The Target Values are the construction parameters applied to the Actual Building simulation model and are representative of average of various areas. 5. The U-values include for repeating thermal cold bridges. For non-repeating thermal bridging, it will be necessary to calculate the y-value for each apartment. The use of the default y-value of 0.15W/m 2 K may not achieve the Design Fabric Energy Efficiency necessary to meet Criterion 1 of Part L1A The use of default psi values (Ψ) may not achieve the required y- value therefore junctions between elements and opening details may require to either be Approved Design Details OR calculated in accordance with BR Glazing g-value to vary based upon exposure to sunlight in order to balance day lighting against the cooling loads. 7. Party walls to adjoining/existing building should have U-value 0.30W/m 2 K. 8. Building elements subject to adjacent thermal conditions different from the main rooms should meet Part L limiting U-values or lower. The thermal performance of the residential elements must be cross analysed with FEE calculations, which will take into consideration the performance of the building fabric Building Envelope Non-Residential Areas The proposed thermal performance of the non-domestic areas within the development are set out in the table below. Table 5-2 Proposed Building Thermal Envelope U-values Non-Residential Areas Parameter Part L2A Limiting Values % Improvement over PartL1A Target Values Glazing g-value (BS EN 410) Windows (including skylight and glazed doors) External pedestrian doors (solid) 2.00 W/m².K 48% 1.40 W/m².K 2.00 W/m².K 50% 1.0 W/m².K Windows/Skylight Building Air Tightness 50pa 50% 5 50pa Thermal Bridging (y-value) 0.15 W/m 2.K W/m 2.K U-values External Walls (solid/build-up) 0.35 W/m².K 37% 0.22 W/m².K Roof 0.25 W/m².K 40% 0.15 W/m².K Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

18 05 Be Lean Reducing Energy Demand Parameter Glazing g-value (BS EN 410) Exposed/ Ground Floor Curtain Walling and Pedestrian Doors Part L2A Limiting Values % Improvement over PartL1A Target Values 0.25 W/m².K 40% 0.15 W/m².K 2.20 W/m 2.K 36% 1.40 W/m 2.K Windows 2.20 W/m².K 36% 1.40 W/m².K Windows / Glazed Doors Low Water Consumption Reduced water usage though use of low flow water outlets and appliances can also lead to a reduction in the energy required to heat domestic hot water. SAP 2012 methodology recognises a 5% reduction in domestic hot water heating energy if the dwelling is designed to achieve a water use target of not more than 125 litres per person per day total water consumption. The residential units will be designed to achieve wholesome water consumption of 110 litres per person per day, in line with Approved Document Part G 2015 with 2016 amendments, by the appropriate distribution system design and provision of low water use fixtures and fittings. Glazing Lighting Transmittance N/A N/A 65% Notes: 1. The U values are representative of average of each individual building area. 2. U-values listed above can be traded for achieving practicality of achieving insulation for various building elements. 3. Glazing g-value to vary based upon exposure to sunlight in order to balance day lighting against the cooling loads. If the commercial areas are double-height spaces, the g-value should be reduced to further optimise cooling loads Building Form / Massing The new buildings are designed such that their form and massing will provide passive control of solar gains. This will ensure that solar gains are maximised in winter months (when they are beneficial in reducing heating loads), while in summer months they are minimised (to reduce the effective cooling loads) Facade Optimisation Detailed thermal modelling analysis (using industry-recognised and DCLG Certified dynamic simulation software) has been used during the design process to optimise solar heat gains through glazing with day lighting and thus ensure good levels of natural daylight penetration whilst limiting unwanted solar gain and heat loss Daylight Optimisation As stated previously the external façades have been optimised to minimise direct solar gains whilst maximising daylight provision into the occupied areas. As well as improving occupant comfort by increasing natural daylight provision and visual stimulus, this will reduce the dependency on artificial lighting, thus resulting in energy consumption savings. Refer to the Daylight and Sunlight report by Gordon Ingram Associates (GIA) which will be part of this RMA application. Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

19 05 Be Lean Reducing Energy Demand 5.2 Active Design Features: Regulated Energy Use Building Energy Metering A comprehensive metering system will be installed to monitor overall energy consumption of the building. The system will highlight any out of range consumption figures and readings, allowing a preventative approach through interrogation and resolution of potential problems. Metering of energy usage on all floors, per dwelling will allow building owners / occupiers to view and interrogate where potential energy savings can be made throughout their buildings Low Energy Lighting Energy Efficiency Lighting The Part L1A 2013 Building Regulations require that 75% of all fixed internal light fittings must be capable of accepting low energy lamps alone for new dwellings. For this development it will be targeted for 100% of the fixed light fittings in the residences will be capable of accepting only low energy lamps. Throughout the residential dwellings only low energy LED lighting products will be specified. High frequency ballasts and high efficacy lamps and luminaries will be utilised. Lighting throughout the occupied areas of the building will be intelligently controlled according to the building / area usage. For instance, the WC areas will be controlled via PIR movement detectors which will monitor occupancy and switch off the lights when the area is vacant for a sustained length of time. The use of high efficiency LED lighting products within the interior lighting design where appropriate will be targeted. Lighting in communal/lobby areas, stairwells and the basement will include timed control to ensure switching off to reduce energy consumption. Table 5-3 Applied Lighting Specifications Lighting Efficiency System Parameter Applied Value Dwellings 6 W/m 2 Retail Areas Reception Areas Storage Areas Circulation Areas Car Park Plant Areas 85 lm/w 85 lm/w 65 lm/w 65 lm/w 65 lm/w 65 lm/w Lighting Controls Amenity & Circulation Spaces Presence Detection on/off Note: *All installed Lighting will be LED & all day lighting areas to have daylight dimming controls with local sensors with presence detectors. All transient areas will have on/off presence detectors Efficient HVAC Parameters The following design parameters were assigned to the base building in order to establish its CO2 emission rate over a year. Table 5-4 Applied HVAC parameters for Main Central Plant Residential areas System Parameter Applied Value Space Heating System (CHP Refer Table 6.1) Energy Centre: CHP & Boiler efficiency: 85.6% All lighting within the development will be LED only Efficient Lighting Control Introducing presence detection and daylight dimming within spaces which have access to day light will reduce the lighting levels for times when the lux levels are available via natural day light. Furthermore LED lighting will be required to achieve lighting levels listed in the opposite table. Mechanical Ventilation Domestic Hot Water MVHR SFP: W/l/sec Heat recovery efficiency: 95% Fuel Type Energy Centre 170 L (1 Bed) Storage Volume 210 L (2 Bed) 250 L (3 Bed) 2x250 L (Penthouse) Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

20 05 Be Lean Reducing Energy Demand Table 5-5 Applied HVAC parameters for Main Central Plant Non-domestic areas VRF System Parameter Applied Value Nominal Efficiency (EER) 3.0 Seasonal Efficiency (SEER) 5.0 WC Extract Fans SFP 0.40 W/l/sec Pumps Centralised Fresh Air Unit With Speed Control Ductwork & AHU Leakage Domestic Hot Water Electrical /Metering Power Factor Correction Pump Type Retail Areas Ductwork Leakage Testing AHU CEN Standards Storage Losses Circulation Losses DHW Controls Variable speed multiple pressure sensors Class B Class L (kwh/(l.day) 5 W/m Timed Control Power Factor Greater Than 0.95 Lighting system have provision for metering Automatic Monitoring of energy Data? Controls Central Start & Stop Optimum Start & Stop Local time & temperature Control Weather Compensation Control The Building Regulations Approved Document L identifies that the provision of power factor correction to the building electrical supply can provide significant savings in electrical consumption. A saving in electrical energy consumption of 1% is awarded for power factor correction to 0.9 and a saving of 2.5% awarded for power factor correction to 0.95 power factor. This development intends to have a power factor correction of 0.95 as a minimum 5.3 Active Design Features: Unregulated Energy Use Low Energy White Goods Residential Buildings White goods are responsible for about two thirds of electrical consumption in dwellings. Electrical consumption is responsible for roughly half the carbon emissions from a dwelling. White goods are to be provided with a certified energy label. These are rated from A+++, to D with D being the least efficient. Data supplied by the Energy Advice Centre suggests that using A++ rather than C rated white goods would reduce electrical energy consumption in each dwelling by approximately 800kWh/year. A-rated white goods will be provided for the market apartments, including oven, dishwashers and fridge/freezers. Information on the EU Energy Efficiency Labelling Scheme of efficient white goods will be provided to each affordable and market dwellings for the following appliances, where relevant: Fridge Freezer Wine storage appliance Washer/dryer Washing machine Tumble drier Dishwasher Oven Low Energy Culture Providing building users and operators with practical guidance on the importance and methods of energy efficiency can lead to effective, cost-free reductions in energy usage and carbon emissions. Savings can be expected in, for example: Operating comfort cooling systems efficiently Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

21 05 Be Lean Reducing Energy Demand Lighting Energy: a culture of Turn-It-Off Small Power: avoiding monitors and PCs etc. in stand-by mode Cooling/Heating Energy: widening acceptable temperature range. Training of operators and facility managers is particularly important to provide them with the skills and knowledge to implement and continue to improve an energy management programme. The amount of energy that can be saved will be dependent upon the motivation of the occupants and the effectiveness of the awareness programmes. The development will actively encourage a low energy culture as part of its commercial and residential leasing strategy. 5.4 Fabric Energy Efficiency (Part L1A 2013) Under the 2013 UK Building Regulations it is a requirement that a good minimum standard for building fabric is achieved. This is determined by the calculation, via approved SAP software, of a Fabric Energy Efficiency (FEE), which is the proposed maximum space heating and cooling demand for a dwelling. This results in an estimation of the amount of energy that would normally be required to maintain comfortable internal temperatures, measured in kwh/m 2 /year. To confirm compliance with Part L1A, Brent Cross development must demonstrate that it has a sufficiently efficient fabric in order to meet the requirements of Regulation 26A. The table below outlines the fabric energy efficiency (FEE) for the residential dwellings at Brent Cross South Plot 12. The dwellings on the North Building pass FEE by 6.5% compared to Part L Table 5-6 Fabric Energy Efficiency Residential Dwellings BXS PLOT 12 North Building - Dwellings FEE ANALYSIS TFEE kwh/m 2 /year DFEE kwh/m 2 /year % Improvement TFEE-DFEE 6.5% Pass BXS PLOT 12 South Building - Dwellings FEE ANALYSIS TFEE kwh/m 2 /year DFEE kwh/m 2 /year % Improvement TFEE-DFEE 0% Pass Under UK Building Regulations Part L1A 2013, it is a requirement under Regulation 26A (Criterion 1) that the Design Fabric Energy Efficiency (DFEE) is less than the Target Fabric Energy Efficiency (TFEE), the latter of which is derived from a notional building of the same size and shape but with Part L1A limiting fabric values applied (Criterion 2). Building Regulations Part L1A 2013 Regulation 26A Fabric Energy Efficiency The calculation of the FEE is independent of any building services, and as a result is not affected by carbon emissions factors for different fuel types. The key influential factors on the FEE include: Building Fabric U-values Thermal Bridging Air Permeability Thermal Mass External Heat Gain Internal Heat Gains (i.e. metabolic gains, appliances) Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

22 06 Be Clean Heating Infrastructure 6. Be Clean Heating Infrastructure As the first plot to be developed at Brent Cross South (BXS), Plot 12 will house a boiler room to serve the plot initially with space to add boilers as plots 11, 13 and 18 come forward. Once the main energy centre at Plot 59 is operational, the heat plant room at Plot 12 will be kept as load peak plant. The image below illustrates the location of the main energy centre located on the left hand side at plot 59. Two heat plant rooms are proposed at plots 12 and 19 for the short term energy strategy. The interconnection to BXN is currently being explored, and so is not yet confirmed. provided with heat, via appropriate infrastructure, from a local centralised boiler and with electricity from the grid. An example of this is the Whitefield Estate relocation, which will occur prior to the heat network being available. ( ) All cooling on the BXC development will be provided on a localised plot basis to minimise distribution losses, and is anticipated to be high efficiency electric based cooling using air cooled chillers which have a seasonal COP of over 3.5 as compared to absorption chiller COP of less than 2. Detailed design of such systems will be carried out by individual plot designers. The domestic and non-residential areas at Plot 12 will be connected to the main energy centre, therefore the carbon emissions calculation considers the CHP specification outlined in the table below. The percentage split of space heating provided by the CHP and boilers is 60% and 40%, respectively. Table 5-5 specifies the seasonal air cooled chiller efficiency higher than 3.5 as outlined in the RES. Appendix F within this document contains a technical note from Buro Happold on the plant room strategy for Phase 1 (South) and long term site-wide strategy. Table 6-1 CHP Specification (main energy centre) Application of CHP CHP Parameters CHP to serve Domestic and Non-domestic Buildings Providing more than 60% of the Heating demand. Natural Gas Consumption (GCV) (GCV) CHP Heat Output CHP Electrical Output 5071 kw 1,977 kw 2,000 kw Figure 6-1 Energy Centre Approach serving Plot 12 development As stated in the site-wide RES (Ref No 14/08106/CON), section 5.1: Data based upon MWM TCG 2020 (2115kWth) unit Information Source: Edina Power Generation via Buro Happold, District Energy Network Consultants Overall Efficiency (GCV) 78.3% Heat Efficiency (GCV) 38.9% Power Efficiency (GCV) 39.4% Power Ratio Number of unit 3 The energy centre will be served by gas-fired CHP and gas boilers. Principal residential buildings will be connected to the CHP and the district heating scheme, subject to feasibility, via the appropriate infrastructure. Other non-residential buildings will be able to connect to the heat network, should they elect to do so. As set out in the S106 agreement, any building constructed and ready for occupation before the heat network and its associated infrastructure are operational will be The final CHP selection will be decided at detailed design stages in collaboration with the potential ESCO provider. 6.1 Be Green Renewable Energy Plot 12 achieves the target carbon emissions savings from Lean and Clean measures alone, as the next section will present, therefore no other technology is proposed. Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

23 07 Carbon Savings 7. Carbon Savings 7.1 Residential Areas Representative sample flats were modelled in SAP 2009 covering lower, mid and upper floors. The tables below show the carbon emissions against Part L 2010 and that Plot 12 reaches the target of 40% improvement in the residential area. Table 7-1 Carbon dioxide emissions after each stage of the energy hierarchy for Residential Areas (Part L1A 2010) Residential Areas Base line: Part L 2010 of the Building Regulations Compliant Development Carbon Dioxide Emissions for Residential Areas (Tonnes CO2 per Annum) Regulated Energy After energy demand reduction After heat network / CHP After renewable energy Current Building Regulations Part L1A 2013 Those representative flats were also modelled in SAP 2012 to demonstrate compliance with the current Building Regulations Part L 2013 for each stage of the energy hierarchy, in accordance with GLA. The residential areas at Plot 12 achieve a 7.1% improvement over Part L1A 2013, complying with Criterion 1 Carbon emissions for the Lean building. Table 7-3 Carbon dioxide emissions after each stage of the energy hierarchy for Residential Areas (Part L1A 2013) Residential Areas Base line: Part L 2013 of the Building Regulations Compliant Development Carbon Dioxide Emissions for Residential Areas (Tonnes CO2 per Annum) Regulated Energy After energy demand reduction After heat network / CHP After renewable energy Table 7-2 Regulated carbon dioxide savings from each stage of the Energy Hierarchy for Residential areas (Part L1A 2010) Residential Areas Savings from reduced energy demand Regulated Carbon Dioxide Savings (Tonnes CO2 per Annum) (%) % Saving from heat network / CHP % Savings from renewable energy % Total cumulative on site savings % Total Target Savings RMA (S73) % Regulated Annual Surplus 26.5 Table 7-4 Regulated carbon dioxide savings from each stage of the Energy Hierarchy for Residential areas (Part L1A 2013) Residential Areas Savings from reduced energy demand Regulated Carbon Dioxide Savings (Tonnes CO2 per Annum) (%) % Saving from heat network / CHP % Savings from renewable energy % Total cumulative on site savings % Compliance with current Building YES Regulations Approved Document L Criterion 2 of Part L 2013, FEE, has also been satisfied (refer to section 5.4), Criterion 3 refers to overheating risk which is addressed in Appendix G. Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

24 07 Carbon Savings 7.2 Non-domestic Areas The commercial areas were modelled in recognised industry software IES VE (DSM) for compliance assessment against Part L The tables below show the carbon emissions against Part L 2010 and that Plot 12 reaches the target of 25% improvement in the commercial areas. Table 7-5 Carbon dioxide emissions after each stage of the energy hierarchy for Non-domestic Areas (Part L2A 2010) Non-domestic Areas Base line: Part L 2010 of the Building Regulations Compliant Development Carbon Dioxide Emissions (Tonnes CO 2 per Annum) Regulated Energy 73.9 After energy demand reduction 50.9 After heat network / CHP 50.9 After renewable energy 50.9 Table 7-6 Regulated carbon dioxide savings from each stage of the Energy Hierarchy for Nondomestic areas (Part L2A 2010) Non-domestic Areas Savings from reduced energy demand Regulated Carbon Dioxide Savings (Tonnes CO 2 per Annum) (%) % Current Building Regulations Part L2A 2013 The assessment against Part L2A 2013 shows that the non-domestic areas at Plot 12 are 17.9% better than the target. Table 7-7 Carbon dioxide emissions after each stage of the energy hierarchy for Non-domestic Areas (Part L2A 2013) Non-domestic Areas Base line: Part L 2013 of the Building Regulations Compliant Development Carbon Dioxide Emissions (Tonnes CO 2 per Annum) Regulated Energy 71.2 After energy demand reduction 58.5 Table 7-8 Regulated carbon dioxide savings from each stage of the Energy Hierarchy for Nondomestic areas (Part L2A 2013) Non-domestic Areas Savings from reduced energy demand Compliance with current Building Regulations Approved Document L Regulated Carbon Dioxide Savings (Tonnes CO 2 per Annum) (%) % YES Saving from heat network / CHP % Savings from renewable energy % Total cumulative on site savings % Total Target Savings - RMA % Regulated Annual Surplus 4.56 Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

25 08 Sustainability Statement 8. Sustainability Statement 8.1 Water As set out by Conditions 35.1 and 35.2 of s73, all residential units will achieve a minimum standard of Code for Sustainable Homes Level 4, and the commercial units will achieve a minimum of BREEAM Very Good at Plot 12. The Water Use Principles within the RDSF, specifically at Paragraph 2.71 will also be met.: residential developments will be designed to achieve a water usage of 105 litres/person/day (38.3 cubic metres / person / year; equivalent to the requirement for a 4-star rating using the Code for Sustainable Homes), with an aspiration of meeting the target of 80 litres/person/day (29.2 cubic metres/person/year, equivalent to the minimum requirement for a 5-star rating using Code for Sustainable Homes); rainwater harvesting will be designed to capture 10% of rain falling on the site for irrigation and cleansing use, and grey water will be recycled from commercial buildings, if that proves necessary to meet demand; water metering will be installed in all buildings and leak detection systems in commercial buildings; low water use fittings/appliances and A rated white goods will be a requirement in all residential development; and water butts will be provided in residential buildings with individual gardens or suitable balconies. Plot 12 will comply with Conditions 35.1 and 35.2, also the sustainability features outlined in Table 9 of the RDSF will be implemented where applicable within the development (refer to table on the next page). The maximum indoor water consumption will be 105 litres per person per day in the new dwellings. This table gives indicative water fittings flow rates and capacities for an apartment with a single bathroom, which would comply with Approved Document Part G optional requirements from Table 2.2. Table 8-1 Water Fittings - Basis of Specification for Residential Areas Water fitting - Dwellings Capacity / flow rate (Part G table 2.2) Units Kitchen sink taps 6 litres/minute Washing machine 8.17 litres/kg Dishwasher 1.25 litres/place setting Table 8-2 Water Fittings - Basis of Specification for Non-domestic Areas Water fitting - Dwellings Capacity / flow rate Units WC, dual flush 2.95 litres Wash hand basin taps 4 litres/minute Urinals 0.5 litres Shower 10 litres/minute Kitchen sink taps 5 litres/minute 8.2 Rainwater Plot 12 To ensure that the development complies with the site wide target for 10% of rainwater falling on the site to be harvested for irrigation and cleansing use, specified within Paragraph 2.71 of the RDSF, the design team will have regard to the following considerations throughout the detailed design process: avoid rainwater collection from green roof, otherwise water treatment will be required; re-use of rainwater to serve irrigation rather than re-circulation to residential units, which saves space within the risers. The rainwater is collected from the roof of the affordable housing block, stored in tanks at ground floor and then used to irrigate the pocket park. The affordable block is greater than 10% of the plot area and therefore complies with the planning requirement. This combines the needs for rainwater harvesting and irrigation. Water fitting - Dwellings Capacity / flow rate (Part G table 2.2) Units WC, dual flush 4/2.6 litres Wash hand basin taps 5 litres/minute Bath 170 litres Shower 8 litres/minute Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

26 08 Sustainability Statement Table 9: Sustainability Features Delivered by Developers of Individual Plots within BXC (RDSF, October 2013) Topic Feature Features at Plot 12 Implement Construction Environmental Management Plans Undertake pre-demolition audits for all buildings Done at masterplan level, Reuse at least 70% demolition arisings, audited using ICE Demolition Protocol not applicable for RMA site Follow CoCP (Code of Construction Practice) Materials Register each contract under the Considerate Constructors Scheme 90% of timber to be obtained from a sustainable source Forest Stewardship Council (FSC) Use no peat or natural weathered limestone Use materials selected from A to C options in the BRE s Green Guide to Specification (BRE, 2009)., where possible. Construction materials will have at least 10% recycled content (by value); audited using the WRAP Recycled-Content Toolkit. Avoid using materials that deplete the Ozone layer and that contribute to global warming. Operational Waste Energy & CO2 emissions strategy Water Resource Efficiency Building Environmental Performance Targets Open Space / Public Realm All residential buildings will be designed, and infrastructure provided, to allow for recycling or composting of at least 40% of household waste. All commercial buildings will be designed, and infrastructure provided, to allow for recycling or composting of at least 60% of commercial waste. Residential buildings to achieve a minimum of 40% reduction in carbon emissions below that required under Building Regulations Part L 2010 & Commercial Buildings to achieve a minimum of 25% reduction in carbon emissions below that required under Building Regulations Part L Achieve a reduction in carbon emissions by use of renewable or low carbon energy sources. Water use in residential buildings to be less than 105 litres per person per day. Water use in commercial office buildings to be less than 20 litres per full-time employee per day. Install water metering in all buildings. Install leak detection systems in commercial buildings only. Install low-water-use fittings / appliances, where fitted by the developer. Install A-rated appliances (white goods), where fitted by the developer. Reuse grey water from commercial buildings if there are appropriate uses. Provide water butts in residential buildings with gardens or suitable balconies. Commercial office buildings to achieve at least Very Good rating using BREEAM New Construction (2011), with an aspiration for Excellent Residential buildings to achieve at least Code for Sustainable Homes 4 with an aspiration for higher. All residential development should meet Lifetime Home standards and 10% of units should meet wheelchair accessibility standards All residential development should meet Lifetime Home standards and 10% of units should be designed to be wheelchair accessible or easily adaptable for residents who are wheelchair users (London Plan Policy 3.8). Residential development to achieve BS 8233:1999 good standard for external to internal noise where practicable, reasonable standard elsewhere. Residential development to improve on Building Regulations (2003) Part E for internal sound transmission standards by 5dB (as defined in the Code for Sustainable Homes) except where unavoidable external noise intrusion renders this of no additional value. Buildings will be fully e-enabled. Brown or green roofs on 10% of the available roof area, where these secure ecological or amenity benefits. Building / occupier-specific Travel Plan and Travel Plan Coordinator. Provide facilities for bicycles (storage) and electric vehicles (charging points)., rainwater tanks, Retail units only under 2014 scheme, refer to Acoustic Report as part of the RMA Energy and Sustainability Statement Brent Cross Plot /GC/ of 109

27 10 Conclusion 9. Conclusion This report presents a detailed Energy and Sustainability Statement that has been developed for Brent Cross South Plot 12 development conforming to the conditions attached to S73 Permission to be discharged for this Reserved Matters Application. The strategy has appropriately considered the full array of options and technologies available now and in the future. The table below summarised the compliance of Plot 12 against the key Energy and Sustainability commitments. Commitment Compliance Evidence Carbon Commitments & DH connection Residential units to achieve 40% reduction in regulated CO2 emissions compared to Part L SAP calculations show reduction of 48% over Part L Refer to Section 1.1 and 7. Non-residential elements to achieve 25% reduction in CO2 emissions against Part L 2010 compliant scheme. Individual plots have to comply with the relevant version of Part L as appropriate at the point of design construction. Connect all principal residential building plots to the district heat network, where feasible to do so. Connect non-residential building plots to the district heat network, if elected by the developers. Sustainability Commitments All commercial buildings must achieve a minimum standard of BREEAM Very Good. All residential units shall achieve a minimum standard of Code Level 4 under the Code for Sustainable Homes (CfSH). Residential developments will be designed to achieve a water usage of 105 litres/person/day. Low water use fittings/appliances and A rated white goods will be a requirement in all residential developments. Rainwater harvesting will be designed to collect 10% of rainfall on site for irrigation and cleansing use. Dynamic simulation calculations using approved software show reduction of 31.2% over Part L 2010 on the commercial areas. Calculations of carbon emissions for residential and non-domestic areas show compliance against current Building Regulations Part L2013. Plot 12 will host space for boilers for Plot 12 itself and Plots 11, 13 and 18 onwards, and will later be connected to the main energy centre at Plot 59. Both residential and commercial areas will later be served by the district heating network. BREEAM pre-assessment of the Retail Areas attached to this report targets Very Good rating. CfSH pre-assessment attached to this report targets Level 4 rating. 3 credits targeted for both buildings on Wat 1 Internal Potable Water Use (minimum standard for Level 4) 2 credits targeted for both buildings on Ene 5 Energy Labelled White Goods under CfSH Refer to Drainage Strategy. Refer to Section 1.1 and 7. Refer to Section 0, 5.4, and Refer to section 6. Refer to section 6. Refer to Appendix C for preassessment. Refer to Appendix D for preassessment. Refer to Appendix C for CfSH pre-assessment. Refer to Appendix C for CfSH pre-assessment. Refer to Drainage Strategy and section 8 within this report. 25 of 109

28 A Appendices Appendix A - SAP Calculations /GC/ Issue 05

29 A Part L1A 2013 LEAN Dwelling Emission Rate Report Appendix A - SAP Calculations 27 of 109

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