National Calculation Methodology (NCM) - Scottish Government
National Calculation Methodology (NCM) - Scottish Government National Calculation Methodology (NCM) - Scottish Government
Report Prepared by: Building Research Establishment (BRE) Bucknalls Lane Watford WD25 9XX 01923 664000 enquiries @bre.co.uk The opinions expressed in this report are those of the author. Report commissioned by: Directorate for the Built Environment Building Standards Division Denholm House Almondvale Business Park Livingston EH54 6GA Tel: 01506 600 400 Fax: 01506 600 401 e-mail: buildingstandards@scotland.gsi.gov.uk web: http://www.scotland.gov.uk/bsd © Crown Copyright 2010 Applications for reproduction of any part of this publication should be addressed to: BSD, Directorate for the Built Environment, Denholm House, Almondvale Business Park, Livingston, EH54 6GA This report is published electronically to limit the use of paper, but photocopies will be provided on request to Building Standards Division. 2
Contents. Contents 3 List of Tables 4 Acronyms Used in this Guide 5 1 Introduction 6 2 Approved Software Tools 7 Versions Policy 8 Choosing a Software Tool 8 SBEM Constraints 9 3 Compliance with Building Regulations 10 Definition of the Notional Building 10 Building Fabric 11 Solar and Daylight Transmittance 13 Areas of Windows, Doors and Rooflights 13 HVAC System Definition 14 Installed Lighting Power Density 18 The Target Emission Rate (TER) 19 Modular and Portable Buildings 21 Shell Buildings 21 Extensions to the Insulation Envelope 22 4 Energy Performance Certificates (EPCs) 23 Other reference values 24 5 Input Data to Approved Tools 25 Defining internal gains and environmental conditions 25 Constructions 26 Low and zero carbon systems 26 Weather Location 27 Zoning Rules 27 Measurement and Other Conventions 28 6 NCM Databases 30 Activity Database 30 Construction and Glazing Databases 37 7 Suitability of Calculation Method 42 Availability of Tools and Competence of Users 42 The Complexity of the Building and its Services 42 Whether Workarounds are Available 43 Limitations of all Software Tools 43 Users of the Software 44 3
- Page 1: Directorate for the Built Environme
- Page 5 and 6: BER Building Emission Rate BSD Buil
- Page 7 and 8: 2 Approved Software Tools. 5. Non-d
- Page 9 and 10: of building or building features. T
- Page 11 and 12: Building Fabric 26. The U-values in
- Page 13 and 14: Methods that use flow networks are
- Page 15 and 16: egarded as being mechanically venti
- Page 17 and 18: d. The electricity used by fossil-f
- Page 19 and 20: . For other spaces, divide the illu
- Page 21 and 22: Table 6: Carbon dioxide emission fa
- Page 23 and 24: 4 Energy Performance Certificates (
- Page 25 and 26: 5 Input Data to Approved Tools. 74.
- Page 27 and 28: d. Any fuel used in generating the
- Page 29 and 30: Table 8: Measurement and other conv
- Page 31 and 32: pressure filtration is also defined
- Page 33 and 34: Building Type Description 16 Non-re
- Page 35 and 36: Activity Type Description 33 Generi
- Page 37 and 38: Construction and Glazing Databases
- Page 39 and 40: ID Category Construction Name 518 P
- Page 41 and 42: ID Category Construction Name 565 P
- Page 43 and 44: 101. It may also be that more compl
Contents.<br />
Contents 3<br />
List of Tables 4<br />
Acronyms Used in this Guide 5<br />
1 Introduction 6<br />
2 Approved Software Tools 7<br />
Versions Policy 8<br />
Choosing a Software Tool 8<br />
SBEM Constraints 9<br />
3 Compliance with Building Regulations 10<br />
Definition of the Notional Building 10<br />
Building Fabric 11<br />
Solar and Daylight Transmittance 13<br />
Areas of Windows, Doors and Rooflights 13<br />
HVAC System Definition 14<br />
Installed Lighting Power Density 18<br />
The Target Emission Rate (TER) 19<br />
Modular and Portable Buildings 21<br />
Shell Buildings 21<br />
Extensions to the Insulation Envelope 22<br />
4 Energy Performance Certificates (EPCs) 23<br />
Other reference values 24<br />
5 Input Data to Approved Tools 25<br />
Defining internal gains and environmental conditions 25<br />
Constructions 26<br />
Low and zero carbon systems 26<br />
Weather Location 27<br />
Zoning Rules 27<br />
Measurement and Other Conventions 28<br />
6 <strong>NCM</strong> Databases 30<br />
Activity Database 30<br />
Construction and Glazing Databases 37<br />
7 Suitability of <strong>Calculation</strong> Method 42<br />
Availability of Tools and Competence of Users 42<br />
The Complexity of the Building and its Services 42<br />
Whether Workarounds are Available 43<br />
Limitations of all Software Tools 43<br />
Users of the Software 44<br />
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