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Overview
Adequate ventilation can reduce the transmission of infection in health-care settings. Natural ventilation can be one of the effective environmental measures to reduce the risk of spread of infections in health care.
This guideline first defines ventilation and then natural ventilation. It explores the design requirements for natural ventilation in the context of infection control, describing the basic principles of design, construction, operation and maintenance for an effective natural ventilation system to control infection in health-care settings.
Contents
- Foreword
- Acknowledgments
- Contributors
- Conflicts of interest
- Executive summary
- Acronyms and definitions of terms
- Part 1. Infection control and ventilation
- Part 2. Designing for natural ventilation
- 4. Understanding natural ventilation
- 5. Design and operation
- 5.1 Designs for natural ventilation and hybrid ventilation systems
- 5.2 Basic design concepts for natural ventilation
- 5.3 Climatic and other considerations in ventilation design
- 5.4 Designing for natural and hybrid ventilation systems
- 5.5 Types of natural ventilation systems
- 5.6 Applicability of natural ventilation systems
- 5.7 Commissioning, operation and maintenance
- 5.8 Summary
- References
- Annexes
- Annex A Articles included in the systematic review on the association between ventilation and infection
- Annex B Recommendation GRADE appraisal tables (GRADE system)
- Annex C Respiratory droplets
- Annex D Basic concept of ventilation flow rate
- Annex E Rationale for determining the minimum ventilation rate requirements
- Annex F Natural ventilation example I: Hospital Nacional Dos de Mayo, Lima, Peru
- Annex G Natural ventilation example II: Grantham Hospital, Hong Kong SAR, China
- Annex H Natural ventilation example III: Tuberculosis Control Unit, Tan Tock Seng Hospital, Singapore
- Annex I Natural ventilation example IV: IOM Isolation Centre, Damak, Nepal
This document is the product of collaboration between WHO Water Sanitation and Health (WSH) and WHO Biorisk Reduction for Dangerous Pathogens (BDP)
The designations employed and the presentation of the material in this publication do not imply the expression of any opinion whatsoever on the part of the World Health Organization concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. Dotted lines on maps represent approximate border lines for which there may not yet be full agreement.
The mention of specific companies or of certain manufacturers' products does not imply that they are endorsed or recommended by the World Health Organization in preference to others of a similar nature that are not mentioned. Errors and omissions excepted, the names of proprietary products are distinguished by initial capital letters.
All reasonable precautions have been taken by the World Health Organization to verify the information contained in this publication. However, the published material is being distributed without warranty of any kind, either expressed or implied. The responsibility for the interpretation and use of the material lies with the reader. In no event shall the World Health Organization be liable for damages arising from its use.
The named authors alone are responsible for the views expressed in this publication.
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