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AM10 provides practical guidance on the design of natural ventilation in non-domestic buildings. It is intended for all members of the design team and focuses on the implementation of natural ventilation strategies in contemporary practice.
Wherever possible, this Applications Manual cross-references other CIBSE guidance. Topics such as air quality requirements, design flow rates, thermal comfort criteria and the broader context of ventilation system selection are covered in detail in documents such as CIBSE Guide A, Guide B1 and AM13. This approach avoids duplication, reduces inconsistency, and allows this manual to concentrate on the specific issues and decisions involved in natural ventilation design.
The manual is structured to support a wide range of users. Section 2 introduces the purpose of ventilation and the physical principles that govern natural airflow, without using mathematics. Sections 3 and 4 guide the reader through system integration, components, controls, and design tools. Section 5 provides detailed methods and worked examples for those undertaking the technical design
Nomenclature
Symbols
Abbreviations
1 Introduction
2 Developing the design strategy
2.1 Purpose of ventilation
2.2 Meeting design requirements
2.3 Selecting a natural ventilation strategy
2.4 Physical processes in natural ventilation
2.5 Ventilation strategies
3 Ventilation components, control and integration into system design
3.1 From strategy to specification
3.2 Ventilation opening types
3.3 Internal obstructions
3.4 Infiltration
3.5 Window stays and automatic controlled actuators
3.6 The control system
3.7 Installation and commissioning
4 Design tools
4.1 Choosing appropriate tools for design stages
4.2 Envelope flow models
4.3 Dynamic thermal modelling
4.4 Computational fluid dynamics
4.5 Wind tunnel testing
4.6 Water bath modelling
4.7 Large-scale testing
4.8 Complementary techniques
5 Envelope flow models and data
5.1 Establishing required airflow rates
5.2 Data requirements
5.3 The design process using envelope flow models
5.4 Single-cell envelope flow models: unidirectional flow
5.5 Single-cell envelope flow models: bidirectional flows
5.6 Input data
5.7 Example calculations
References and bibliography
Appendix A: Responsibility matrix
Authors: Benjamin Jones (University of Nottingham), Chris Iddon (UCL), Andrew Acred (Fosters and
Partners), Patrick Sharpe (Atelier Ten)
Steering Group: Benjamin Jones (University of Nottingham) (Chair), Andrew Acred (Foster + Partners), Professor Malcolm Cook (Loughborough University), Vivian Dorizas (CINEA, European Climate,
Infrastructure and Environment Executive Agency), Shaun Fitzgerald (University of Cambridge),
Jake Hacker (Arup), Abigail Hathway (University of Sheffield), Professor Gary Hunt (University of
Cambridge), Chris Iddon (UCL), Professor Maria Kolokotroni (Brunel University of London),
Malcolm Orme (independent), Patrick Sharpe (Atelier Ten), Chris Twinn (Twinn Sustainability
Innovation)
Peer reviewers: Ben Abel (Hilson Moran), Professor Malcolm Cook (Loughborough University) and Abigail
Hathway (University of Sheffield)
Acknowledgements: The authors wish to acknowledge the contribution of Martin Oates (SE Controls), Christoffer Plesner (VELUX) and Jannick Roth (WindowMaster International A/S), who provided comment
on early drafts of this document