Table of Contents

1 General

1.1 Scope

1.2 Definitions

1.3 Purpose And Context Of Use

2 General Requirements

2.1 Groups Of Buildings

2.2 Integrity Of Thermal Insulation

2.3 Conservatories, Outbuildings And Atria

3 Compliance Methods

3.1 Schedule Method

3.2 Calculation Method

3.3 Modelling Method

Appendices

Appendix A Modelling Method – Building Energy Use Comparison

A1 Modelling Requirements

A2 Thermal Envelope

A3 Lighting

A4 Internal Loads

A5 Conditioning System Modelling

A6 Reference Building

A7 Information And Documentation

Appendix B Climate Zones

Appendix C Heat Loss Equation Tables

Appendix D Worked Example

Appendix E Building Component R-Value Combinations

Appendix F Measurement Details

Appendix G Glazing And The Window Efficiency Rating Scheme (Wers)

Appendix H Orientation

Tables

Table 1 – Non-Solid Construction – Minimum R-Values For Schedule Method (Only Where Area Of Glazing Is 30 % Or Less Of Total Wall Area)

Table 2 – Solid Construction – Alternative Minimum R-Values For Schedule Method (Only Where Area Of Glazing Is 30 % Or Less Of Total Wall Area)

Table 3 – Heated Walls, Ceilings Or Floors – Minimum R-Values For Schedule Method

Table 4 – Reference Building – Area Of Glazing R-Values

Table A1 – Default Power Densities For Internal Gains From Occupants And Plug Loads

Table A2 – Default Schedules For Occupancy And Plug Loads – Percentage Of Maximum Load Or Percentage Of Power Density

Table C1 – Reference Heat Loss Equations – Non-Solid Construction

Table C2 – Reference Heat Loss Equations – Solid Construction

Table E1 – Building Component R-Value Combinations

Table G1 – Climate Zones 1 And 2: Wers Star Rating

Table G2 – Climate Zone 3: Wers Star Rating

Figures

Figure 1 – Decision Flowchart

Figure B1 – Climate Zones

Figure F1 – Floor And Wall Area Measurements And R-Value Locations

Figure F2 – Roof Area Measurements

Figure F3 – Roof Area Measurements

Figure F4 – Total Wall Area

Figure F5 – Wall Area

Figure F6 – Window Measurement – Single Window

Figure F7 – Bow Or Bay Window Measurement

Figure F8 – Rooflight Measurement

Figure F9 – Skylight Measurement

Figure H1 – Orientation Sectors