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GB/T 18204.5-2025: Examination methods for public places - Part 5: Central air conditioning and ventilation systems
Status: Valid GB/T 18204.5: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 18204.5-2025 | English | 559 |
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Examination methods for public places - Part 5: Central air conditioning and ventilation systems
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GB/T 18204.5-2025
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| GB/T 18204.5-2013 | English | 439 |
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Examination methods for public places -- Part 5: Central air conditioning ventilation system
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GB/T 18204.5-2013
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| GB/T 18204.5-2000 | English | 199 |
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Methods of microbiological examination for towel and bedclothes in public places. Determination of Coliform bacteria
| Obsolete |
GB/T 18204.5-2000
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PDF similar to GB/T 18204.5-2025
Basic data | Standard ID | GB/T 18204.5-2025 (GB/T18204.5-2025) | | Description (Translated English) | Examination methods for public places - Part 5: Central air conditioning and ventilation systems | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | C51 | | Classification of International Standard | 13.060 | | Word Count Estimation | 27,269 | | Date of Issue | 2025-05-30 | | Date of Implementation | 2025-12-01 | | Older Standard (superseded by this standard) | GB/T 18204.5-2013 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 18204.5-2025: Examination methods for public places - Part 5: Central air conditioning and ventilation systems
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 13.060
CCSC51
National Standard of the People's Republic of China
Replaces GB/T 18204.5-2013
Public Place Hygiene Inspection Methods
Part 5.Central air conditioning and ventilation systems
Released on 2025-05-30
2025-12-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of contents
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Legionella pneumophila 2
5 Total bacteria count 9
6 Total fungi 12
7 β-hemolytic streptococci in air-conditioning supply air 13
8 Fresh air volume 15
9 PM10 inhalable particles in air-conditioning supply 15
10 The amount of dust on the inner surface of the air duct of the air conditioner is 17
11 Air conditioning system air purification and disinfection device 18
Reference 22
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document is part 5 of GB/T 18204 “Test methods for hygiene in public places”. GB/T 18204 has been published in the following parts.
--- Part 1.Physical properties;
--- Part 2.Chemical properties;
--- Part 3.Air microbial indicators;
--- Part 4.Microbiological indicators for public supplies and utensils;
--- Part 5.Central air conditioning and ventilation systems;
--- Part 6.Technical specifications for health monitoring.
This document replaces GB/T 18204.5-2013 "Public Place Hygiene Inspection Methods Part 5.Central Air Conditioning and Ventilation Systems" and
Compared with GB/T 18204.5-2013, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) The scope of application has been changed (see Chapter 1, Chapter 1 of the.2013 edition);
b) Added the terms and definitions of “Legionella pneumophila”, “total bacterial count”, “total fungal count” and “β-hemolytic Streptococcus” (see 3.1 to 3.4);
c) Added the quantitative detection method for Legionella pneumophila and the rapid detection method of fluorescent polymerase chain reaction (PCR) (see 4.1 and 4.2);
d) The microbial detection method for the inner surface of air-conditioning ducts has been changed (see Chapter 5, Chapter 6, and Chapter 11 of the.2013 edition).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document is proposed and coordinated by the National Center for Disease Control and Prevention.
This document was drafted by. Institute of Environmental and Health-related Product Safety, Chinese Center for Disease Control and Prevention, Inner Mongolia Autonomous Region Center for Disease Control and Prevention
Center, Chinese Center for Disease Control and Prevention, Jiangsu Provincial Center for Disease Control and Prevention, Shenzhen Center for Disease Control and Prevention.
The main drafters of this document are. Yao Xiaoyuan, Pan Lijun, Gao Sheng, Wang Zhe, Ding Zhen, Yu Shuyuan, Zhang Wei, Li Yunpu, Zheng Lei, Yan Xu, Shi Xiaolu,
Yang Wenjing, Ye Dan, and Zhang Yujing.
The previous versions of this document and the documents it replaces are as follows.
---First published in.2013 as GB/T 18204.5-2013;
---This is the first revision.
Introduction
GB/T 18204 "Public Place Hygiene Inspection Methods" is a national recommended standard and is consistent with GB 37488 "Public Place Hygiene Indicators and Limits".
GB/T 18204 (all parts) is used in conjunction with the "Requirements for Public Places" and is the recommended standard test method for public place hygiene monitoring.
The publication is conducive to standardizing sample collection, on-site and laboratory testing in public places, and improving the precision and accuracy of test results of testing institutions.
This document is part 5 of GB/T 18204.
This revision adjusted the scope of application and normative reference documents, added quantitative detection methods for Legionella pneumophila and fluorescent PCR detection methods.
The method integrates the sampling and detection methods of dust microorganisms on the surface of air-conditioning supply air and air-conditioning ducts to further improve the scientificity and reliability of the standard.
Operability and applicability.
GB/T 18204 consists of 6 parts.
--- Part 1.Physical indicators. The purpose is to provide the basic principles and requirements for on-site testing of physical indicators in public places.
--- Part 2.Chemical indicators. The purpose is to provide a basis for sample collection and laboratory testing of chemical indicators in public places.
These principles and requirements.
--- Part 3.Air microbial indicators. The purpose is to provide sample collection and laboratory testing of air microbial indicators in public places.
Basic principles and requirements of testing.
--- Part 4.Microbiological indicators of public supplies and utensils. The purpose is to provide microbiological indicators of public supplies and utensils in public places.
Basic principles and requirements for sample collection and laboratory testing.
--- Part 5.Central air conditioning and ventilation systems. The purpose is to provide sample collection of indicators of central air conditioning and ventilation systems in public places
and basic principles and requirements of laboratory testing.
--- Part 6.Technical specifications for health monitoring. The purpose is to standardize the frequency and sample size of health monitoring in public places, quality control, etc.
Technical requirements.
Public Place Hygiene Inspection Methods
Part 5.Central air conditioning and ventilation systems
1 Scope
This document describes the presence of Legionella pneumophila, total bacteria count, total fungus count, and β-hemolytic enzymes in the central air conditioning and ventilation systems of public places.
Streptococcus pneumoniae, fresh air volume, inhalable particulate matter (PM10) in air-conditioning supply, dust accumulation on the surface of air-conditioning ducts, and air purification and disinfection devices
Test method.
This document is applicable to central air-conditioning and ventilation systems in public places, and the central air-conditioning and ventilation systems used in other places shall be implemented for reference.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB 4789.28 National food safety standard Quality requirements for culture media and reagents for food microbiology testing
GB/T 6682 Specifications and test methods for water used in analytical laboratories
GB/T 18204.1 Public place hygiene inspection methods Part 1.Physical indicators
GB/T 18204.2 Public place hygiene inspection methods Part 2.Chemical indicators
GB/T 18883 Indoor Air Quality Standard
GB 19489 General requirements for laboratory biosafety
GB/T 34012 Air purification devices for ventilation systems
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Gram-negative rods with blunt ends, flagella, no spores and capsules, and have the ability to survive in a buffer containing L-cysteine and trivalent iron salts.
Legionella spp. is a pathogenic bacterium that has been identified by biochemical and serological tests.
Bacteria are the main type of bacteria that cause Legionnaires' disease.
[Source. GB/T 40392-2021, 3.2, modified]
3.2
Total bacterial count
The growth of mesophilic aerobic and facultative anaerobic bacterial colonies on nutrient agar medium at 36℃±1℃ for 48h
total.
3.3
Total fungal count
The number of colonies formed on Sabouraud agar medium after cultivation at 28℃±1℃ for 3d~5d.
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