Customer Support: 131 242

  • There are no items in your cart
We noticed you’re not on the correct regional site. Switch to our AMERICAS site for the best experience.
Dismiss alert

BS 5925:1991

Current
Current

The latest, up-to-date edition.

Code of practice for ventilation principles and designing for natural ventilation
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

31-05-1991

Committees responsible
Foreword
Section 1. General
1 Scope
2 Definitions
3 Symbols
Section 2. General principles of ventilation
4 Basic data
5 Application
6 Provision for ventilation
7 Choice between natural and mechanical ventilation
Section 3. Natural ventilation
8 General
9 Flow characteristics of openings
10 Generation of pressure differences
11 Meteorological variables
12 Determination of natural ventilation rates
13 Other mechanisms of natural ventilation
14 Fire ventilation
15 Air infiltration
16 Normal building practice for natural ventilation in
    dwellings
Appendix A - Bibliography
Appendix B - Calculation of contaminant concentration
Appendix C - Calculation of ventilation rates to reduce
            the risk of surface condensation under steady
            state conditions
Appendix D - Determination of ventilation requirements
Appendix E - Calculation of reference wind speed ur
Appendix F - Calculation of natural ventilation rates for a
             simple building
Index
Publication(s) referred to

Recommendations for designing for the natural ventilation of buildings for human occupation. Reasons for the provision of ventilation and, where possible, recommends quantitative air flow rates. The basis for the choice between natural and mechanical ventilation and guidance on the design of natural ventilation systems.

This British Standard gives recommendations on the principles which should be observed when designing for the natural ventilation of buildings for human occupation. The standard is in three sections, as follows: Section1. General Section2 outlines the main reasons for the provision of ventilation and, where possible, recommends quantitative air flow rates. It is shown that these form the basis for air supply recommendations for different types of buildings and rooms characterized by usage. The basis for the choice between natural and mechanical ventilation is given. The design of mechanical ventilation systems is dealt with in BS5720. Section3 gives recommendations on the design of natural ventilation systems and on the estimation of air infiltration rates in housing. AppendixA is a bibliography and reference to publications listed in it are shown as: (see AppendixA [15]). AppendixB gives recommendations on evaluating contamination risks. AppendixC gives recommendations on calculating ventilation rates to reduce the risk of surface condensation under steady state conditions. AppendixD gives recommendations on determining ventilation requirements. AppendixE gives recommendations on calculating reference wind speed. AppendixF gives recommendations on calculating natural ventilation rates for a simple building. This standard does not attempt to address thermal comfort aspects of ventilation such as indoor air movement, temperature stratification, exact position of ventilation openings etc. NOTE The titles of the publications referred to in this standard are listed on the inside back cover.

Committee
B/540
DevelopmentNote
Supersedes 89/17211 DC and BS 5925(1980) (09/2005) Reviewed and Confirmed by BSI, August 2007. (07/2007)
DocumentType
Standard
Pages
48
PublisherName
British Standards Institution
Status
Current
Supersedes

BS 8211-1:1988 Energy efficiency in housing Code of practice for energy efficient refurbishment of housing
BS 6896:2005 Specification for installation of gas-fired overhead radiant heaters for industrial and commercial heating (2nd and 3rd family gases)
BS 7083:1996 Guide to the accommodation and operating environment for information technology (IT) equipment
BS 6230:2011 Specification for installation of gas-fired forced convection air heaters for commercial and industrial space heating (2nd and 3rd family gases)
BS 6230:1991 Specification for installation of gas-fired forced convection air heaters for commercial and industrial space heating (2nd family gases)
BS 6465-1(2006) : 2006 SANITARY INSTALLATIONS - PART 1: CODE OF PRACTICE FOR THE DESIGN OF SANITARY FACILITIES AND SCALES OF PROVISION OF SANITARY AND ASSOCIATED APPLIANCES
BS EN 60079-10-1:2015 Explosive atmospheres Classification of areas. Explosive gas atmospheres
PD CEN/TR 14788:2006 Ventilation for buildings. Design and dimensioning of residential ventilation systems
EN 60079-10-1:2015 Explosive atmospheres - Part 10-1: Classification of areas - Explosive gas atmospheres
BS 7967-5:2010 Carbon monoxide in dwellings and other premises and the combustion performance of gas-fired appliances Guide for using electronic portable combustion gas analysers in non-domestic premises for the measurement of carbon monoxide and carbon dioxide levels and the determination of combustion performance
CEN/TR 14788:2006 Ventilation for buildings - Design and dimensioning of residential ventilation systems
BS 6230:2005 Specification for installation of gas-fired forced convection air heaters for commercial and industrial space heating (2nd and 3rd family gases)
BS 5250(2011) : 2011 CODE OF PRACTICE FOR CONTROL OF CONDENSATION IN BUILDINGS
BS 6173:2001 Specification for installation of gas-fired catering appliances for use in all types of catering establishments (2nd and 3rd family gases)
BS 6173:2009 Specification for installation and maintenance of gas-fired catering appliances for use in all types of catering establishments (2nd and 3rd family gases)
PD IEC/TR 61831:2011 On-line analyser systems. Guide to design and installation
UNE-EN 60079-10-1:2016 Explosive atmospheres - Part 10-1: Classification of areas - Explosive gas atmospheres
BS 7880:1997 Code of practice for draught control of existing doors and windows in housing using draughtstrips
BS 8409:2009 Fully enclosed play facilities. Code of practice
BS 8485:2007 Code of practice for the characterization and remediation from ground gas in affected developments
IEC TR 61831:2011 On-line analyser systems - Guide to design and installation
BS 8409:2002 Soft indoor play areas. Code of practice
BS 8485:2015 Code of practice for the design of protective measures for methane and carbon dioxide ground gases for new buildings
EEMUA 138 : 2010 DESIGN AND INSTALLATION OF ON-LINE ANALYSER SYSTEMS
BS 6465-1:1994 Sanitary installations Code of practice for scale of provision, selection and installation of sanitary appliances
PD 6686:2006 Guidance on directives, regulations and standards related to prevention of fire and explosion in the process industries
BS IEC 61831:1999 On-line analyser systems. Guide to design and installation
BS 6229:2003 Flat roofs with continuously supported coverings. Code of practice
I.S. EN 60079-10-1:2015 EXPLOSIVE ATMOSPHERES - PART 10-1: CLASSIFICATION OF AREAS - EXPLOSIVE GAS ATMOSPHERES

BS 5410-2:2013 Code of practice for oil firing Installations over 45 kW output capacity for space heating, hot water and steam supply services
BS 8207:1985 Code of practice for energy efficiency in buildings
BS 8303:1986 Code of practice for installation of domestic heating and cooking appliances burning solid mineral fuels
BS 5720:1979 Code of practice for mechanical ventilation and air conditioning in buildings
BS 5643:1984 Glossary of refrigeration, heating, ventilating and air-conditioning terms

View more information
$541.18
Including GST where applicable

Access your standards online with a subscription

Features

  • Simple online access to standards, technical information and regulations.

  • Critical updates of standards and customisable alerts and notifications.

  • Multi-user online standards collection: secure, flexible and cost effective.

Need help?
Call us on 131 242, then click here to start a Screen Sharing session
so we can help right away! Learn more