Homes-User-Guide-Version-2-0

[Type text] User Guide for Homes Version 2.0 Last modified 2016.07.07 Corresponds to EDGE software version 2.0.0 International Finance Corporation [Type text] International Finance Corporation TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS LIST OF FIGURES LIST OF TABLES CHANGE LOG ACRONYMS INTRODUCTION DESIGN PAGE GUIDANCE 11 GREEN MEASURES GUIDANCE 15 TECHNICAL GUIDANCE 17 ENERGY EFFICIENCY MEASURES 19 HME01* – REDUCED WINDOW TO WALL RATIO 20 HME02 – REFLECTIVE PAINT/TILES FOR ROOF – SOLAR REFLECTIVITY 22 HME03 – REFLECTIVE PAINT FOR EXTERNAL WALLS – SOLAR REFLECTIVITY 24 HME04 – EXTERNAL SHADING DEVICES 26 HME05 – INSULATION OF ROOF 30 HME06 – INSULATION OF EXTERNAL WALLS 33 HME07 – LOW-E COATED GLASS 36 HME08 – HIGHER PERFORMANCE GLASS 38 HME09 – NATURAL VENTILATION 41 HME10 – CEILING FANS IN ALL HABITABLE ROOMS 44 HME11* – AIR CONDITIONING SYSTEM - COP OF 3.5 46 HME14 – HEAT PUMP FOR HOT WATER GENERATION 50 HME15 – ENERGY EFFICIENT REFRIGERATORS AND CLOTHES WASHING MACHINES 52 HME16 – ENERGY-SAVING LIGHT BULBS – INTERNAL SPACES 54 HME17 – ENERGY-SAVING LIGHT BULBS – EXTERNAL SPACES 56 HME18 – LIGHTING CONTROLS FOR CORRIDORS & OUTDOORS 58 HME19 – SOLAR HOT WATER COLLECTORS 60 HME20 – SOLAR PHOTOVOLTAICS 62 HME21 – SMART METERS 63 WATER EFFICIENCY MEASURES 65 HMW01* – LOW-FLOW SHOWERHEADS 66 HMW02* – LOW-FLOW FAUCETS FOR KITCHEN SINKS 67 HMW03* – LOW-FLOW FAUCETS FOR WASHBASINS 68 HMW04* – DUAL FLUSH FOR WATER CLOSETS 69 HMW05* – SINGLE FLUSH FOR WATER CLOSETS 70 International Finance Corporation TABLE OF CONTENTS HMW06 – RAINWATER HARVESTING SYSTEM 71 HMW07 – RECYCLED GREY WATER FOR FLUSHING 73 HMW08 – RECYCLED BLACK WATER FOR FLUSHING 74 MATERIALS EFFICIENCY MEASURES 75 HMM01* – FLOOR SLABS 76 HMM03* – EXTERNAL WALLS 83 HMM04* – INTERNAL WALLS 89 HMM05* – FLOORING 93 HMM06* – WINDOW FRAMES 95 HMM07 & HMM08 – INSULATION 97 REFERENCES 99 APPENDIX 1: COUNTRY SPECIFIC CONSIDERATIONS 105 APPENDIX 2: DETAILED LIST OF MATERIALS 107 * indicates a Required measure International Finance Corporation TABLE OF CONTENTS LIST OF FIGURES Figure Screenshot of EDGE tool for Energy Efficiency Measures 19 Figure Relation between the Dh and Dv 26 Figure Proposed Low-E coating position in warm and cold climate 38 Figure 4: A typical home size air-source heat pump showing the water storage tank and the heat pump 50 Figure Home screen to of smart meter with display options to inform home users 64 Figure Screenshot of water efficiency measures of homes tool 65 Figure Screenshot of the Materials efficiency measures in the Homes tool 75 Figure SANS alerts for SA This alert is specific to South Africa 105 LIST OF TABLES Table 1: Base Case System Type Selection 13 Table 2: Base Case System Description 13 Table 3: Solar reflectivity values for typical materials 22 Table 4: Solar reflectivity of typical wall finishes 24 Table 5: Shading factors for horizontal shading devices at different locations 26 Table 6: Shading factors for vertical shading devices at different locations 27 Table 7: Shading factors for combined shading devices (both horizontal and vertical) at different locations 27 Table 8: Typical shading devices 28 Table 9: Shading strategies for different orientations at the design stage 28 Table 10: Insulation types and typical conductivity range 31 Table 11: Thickness of insulation required to achieve a U Value of 0.45 W/m² K 31 Table 12: Insulation types and typical conductivity range 34 Table 13: Thickness of insulation required to achieve a U Value of 0.45 W/m² K 34 Table 14: Approximate SHGC and U Values for different glazing types 37 Table 15: Approximate SHGC and U Values for different glazing types 39 Table 16: Type of cross ventilation 41 Table 17: Depth of floor to ceiling height ratio for different room configurations 42 Table 18: Total area of opening as a proportion of floor area for different heat gain ranges 43 Table 19: Size (m)/Number of ceiling fans required for different room sizes 44 Table 20: Typical COPs for different types of air conditioning systems 47 Table 21: Typical range of efficacies for different lamp types 55 Table 22: Typical range of efficacies for different lamp types 57 Table 23: Assumed lighting loads for the base case and improved case 57 International Finance Corporation CHANGE LOG CHANGE LOG From version 1.1 to version 1.2 (June 2016) Required measures are added to energy, water and materials sections Updates to the submission requirements Update to the content as necessary From version 1.2 to version (July 2016) Update materials sections as per EDGE version and addition of Appendix 2 Update to ceiling fan requirements for India International Finance Corporation ACRONYMS ACRONYMS AHU Air Handling Unit ARI Air-conditioning and Refrigeration Institute ASHRAE American Society of Heating Refrigerating and Air-conditioning Engineers Btu British thermal unit COP Coefficient of Performance EDGE Excellence in Design for Greater Efficiencies HVAC Heating, Ventilation and Air-conditioning kW Kilowatt kWh Kilowatt-hour SC Shading Coefficient SHGC Solar Heat Gain Coefficient sqm Square Meter STP Sewage Treatment Plant TR Tonnage of Refrigeration VLT Visible Light Transmission VAV Variable Air Volume VFD Variable Frequency Drive VSD Variable Speed Drive W Watt Wh Watt-hour WFR Window to Floor Ratio WWR Window to Wall Ratio International Finance Corporation INTRODUCTION INTRODUCTION About EDGE (“Excellence in Design for Greater Efficiencies”) EDGE is a building design tool, a certification system, and a global green standard for nearly 100 emerging market countries The platform is intended for anyone who is interested in the design of a green building, whether an architect, engineer, developer, or building owner EDGE empowers the discovery of technical solutions at the early design stage to reduce operational expenses and environmental impact Based on the user’s information inputs and selection of green measures, EDGE reveals projected operational savings and reduced carbon emissions This overall picture of performance helps to articulate a compelling business case for building green The EDGE software will soon include modules for hospitals, offices, hotels, and retail, with building-specific user guides accompanying them This guide is specifically for new homes construction EDGE is an innovation of IFC, a member of the World Bank Group A Global Green Standard EDGE offers a set of technical measures that when selected will reduce a building’s operational and embodied energy1 and water use Only a handful of measures are required for better building performance that result in lower utility costs, extended equipment service life, and less pressure on natural resources To comply with the EDGE standard a building must achieve a 20% reduction in all three areas when compared to a local benchmark Depending on a user’s design inputs together with information on typical local practice and available building codes, EDGE develops a building’s base case for energy and water use and the impact of embodied energy in materials A spectrum of localized data supports the base case for the project, ranging from a location’s temperature profiles, rainfall patterns, and levels of solar radiation, to the building’s actual dimensions and the economic strata of the occupants EDGE defines a global standard while contextualizing the base case to the occupants and their location The EDGE Perspective Rather than relying on complex simulation software and consultants to predict resource use, EDGE has an easyto-use interface that hides a powerful building physics engine with region-specific data Through user inputs, the data can be further refined to create a highly nuanced set of calculations that have greater accuracy when predicting future building performance EDGE focuses intently on resource efficiency and climate change mitigation, recognizing that too wide of a focus leads to disparate results The intention of EDGE is to democratize the green buildings market, which was previously reserved for higherend buildings standing in relative isolation in primarily industrialized nations Government regulations in emerging economies rarely require resource-efficient building practices EDGE aims to create a new path for green growth by proving the financial case in a practical, action-oriented way that emphasizes a quantitative approach Only then can the gap be closed between non-existent or weakly-enforced green building regulations and expensive international standards, and the potential will be realized to lower utility costs while dramatically reducing GHG emissions EDGE Methodology At the heart of EDGE is a performance calculation engine that harnesses a set of mathematical equations based on the principles of climatology, heat transfer, and building physics Upon receiving design inputs, the calculator charts a building’s potential performance in the areas of energy, water, and materials As markets mature, the underlying data in the calculator can be further sharpened, ensuring EDGE becomes more granular and up-todate Energy consumption is predicted using a quasi-steady-state model (refer to the EDGE Methodology Report2 Version 1, page 6) The quasi-steady-state calculation methodology is based on the European CEN standards and ISO 13790 A similar approach has been taken by energy efficiency building codes (e.g., COMcheck in the US, Simplified Building Energy Model [SBEM] and SAP in the UK) and Energy Performance Certificates (EPCs in Embodied energy is the energy required to extract, manufacture, and transport the materials required to construct and maintain the building https://www.edgebuildings.com/updates-and-guides/#methodology International Finance Corporation INTRODUCTION the EU) to find a quick and cost-effective way to benchmark buildings and to quantify carbon emission reductions In the future, accredited dynamic simulation models will also be an acceptable means of demonstrating compliance with the EDGE standard To determine the base case parameters for efficiency in each of the required areas, EDGE relies on information on typical building practices and national building performance codes, where they are in existence For example, if there is an energy efficiency code (EEC) in practice in a certain country, such as China, then it is used to support the base case calculation Typical systems efficiencies for heating, ventilation, and air conditioning systems have been based on the ASHRAE-90.1-2007 standard This quasi-steady-state model, considers thermal mass within the calculation, using the method detailed in ISO 13790:2008(E) Section 12.3.1.1, in which the heat capacity of the building (J ºK) is calculated by summing the heat capacities of all the building elements facing directly into the interior of the building However, this calculation is not a detailed thermal mass calculation (as might be possible using hourly simulation software) Rather than suggesting a perfect or prescribed scenario, EDGE provides users with a set of best-practice options to explore in order to identify an optimum design solution In this way, the user determines which bundle of technical measures is the best choice for reaching required efficiency levels The purpose of EDGE is to produce consistent and reliable evaluations of resource demand for building certification purposes While EDGE may assist the design process, it is first and foremost a financial model and should not be used for making strategic design decisions If the performance of a particular feature is critical to the design, it is prudent to use an appropriate modelling tool In any case, EDGE should not be used for system sizing or financial modeling Energy savings may be associated with virtual energy for comfort depending on presence of heating or cooling systems Virtual energy is designed to identify the passive design elements benefiting the thermal comfort condition and reducing overheating and overcooling hours Virtual energy will be shown as energy saving however it does not contribute savings to utility bills EDGE Certification Rather than a subjective, points-based merit system with weighted credit scores, EDGE certification is awarded if efficiencies are achieved, resulting in tangible resource savings A simple pass/fail system indicates whether or not the building project has demonstrated the minimum 20% savings in energy, water, and materials compared to the base case model There are no tiers of achievement as certification is driven by a simple set of metrics Requirements for EDGE compliance, at both the design and post-construction phases, are specified throughout this guide, and include such deliverables as design drawings, manufacturers’ data sheets, calculations, proof of delivery, and photographs Assessment is provided by EDGE partners such as the World Green Building Council’s network of affiliates in 96 countries and other international experts who serve as third-party, accredited auditors A design check is required for pre-certification and a site audit is required for final certification EDGE certification makes a branding statement of corporate responsibility and environmental excellence Certification is currently being implemented on a country-by-country basis To find out if EDGE is available in your region, contact edge@ifc.org EDGE Assessment and Certification definitions  Building is defined as a conditioned (heated or cooled) or naturally ventilated structure with at least one full time equivalent occupant, and a minimum building area of 200m²  A Single home is a detached single family home with minimum floor area of 50 m²  Single building: If two buildings are connected by a conditioned space, then they can be considered as a single building  Area limits for mixed use buildings: If a building has more than one use and the secondary use occupies less than 200 m², the entire building can be certified under the primary use of building If the area of secondary use is more than 200 m², then that portion should be certified separately For example, a 10,000 m² residential building, with a retail portion of 300 m² located within the ground floor, would be certified in separate Homes and Retail EDGE Certificates  Multiple buildings: When one project (such as a housing development), with a single owner, consists of a number of buildings, these buildings of less than 200m² with the same use may be clustered together as a single building Buildings larger than 200m² would be considered as separate buildings In residential projects, however, each individual unit would receive EDGE certificate, not the overall building When there are multiple types of units, each unit is assessed separately International Finance Corporation INTRODUCTION EDGE Homes (Version 2.0) is optimized for the following:  Browser (the following versions or higher): IE10, Firefox 30, Chrome 35, or Safari 5.1  Operating System: Windows or higher, or Mac OS  Screen Resolution: Viewed best at 1680 X 1050 pixels  Limited functionality is available on iPhones, Androids, and tablets An Innovation of IFC EDGE is an innovation of IFC, a member of the World Bank Group IFC 2121 Pennsylvania Avenue, NW Washington, DC 20433 edge@ifc.org www.edgebuildings.com International Finance Corporation 10