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Hospital Air Purification Standards
Comprehensive guidelines for air quality management in healthcare facilities
Scope of the Standards
This standard specifies the management and hygienic requirements, air purification methods and air purification effects of hospital air purification. This standard applies to hospitals of all levels and categories. Other medical institutions may refer to it for implementation.
Figure 1: Modern hospital air purification system
Key Terms and Definitions
Air Purification
Technology or methods to reduce microorganisms, particulate matter, etc. in indoor air to make them harmless.
Clean Operating Room
It adopts certain air purification technology to make the air colony count and dust particle count reACH the corresponding cleanliness level standard.
Natural Ventilation
Ventilation that uses the heat pressure or wind pressure caused by the density difference between the air inside and outside the building.
Figure 2: Clean operating room environment
Management and Hygiene Requirements
Air Purification Management Requirements
Hospitals should establish air purification management systems based on regulations and actual conditions
Training for users and managers of air purification facilities
Implement air purification measures based on infection risk assessment
Regular inspection and guidance of air quality in clinical departments
Air Purification and Hygiene Requirements
| Department/Area | Air Bacterial Colony Requirement |
|---|---|
| Clean operating rooms, clean bone marrow transplant wards | Meet GB50333 requirements |
| Non-clean operating rooms, ICU, neonatal rooms | ≤4cfu/(15min diameter 9cm plate) |
| Pediatric wards, emergency rooms, general wards | ≤4CFu/(5min diameter 9cm plate) |
Air Purification Methods
1. Ventilation Methods
Natural Ventilation
Ventilation should be carried out according to season, outdoor wind speed and temperature.
Mechanical Ventilation
Uses fans and exhaust systems to create air flow. Includes air supply and exhaust methods.
Figure 3: Mechanical ventilation system in a hospital
2. Air Cleaning Technologies
Ultraviolet Disinfection
For disinfection in unmanned rooms with specific installation requirements.
Electrostatic Adsorption
Uses electrostatic forces to eliminate dust and microorganisms.
Chemical Methods
Includes ultra-low volume spray and fumigation for unmanned areas.
Figure 4: Advanced air purification technology
Air Purification Methods for Different Departments
Operating Departments
Central air conditioning with purification equipment
Air purification technology
UV air disinfector systems
Electrostatic adsorption systems
High-Risk Areas (ICU, Neonatal)
Ventilation systems
Centralized air conditioning with purification
UV disinfection systems
Electrostatic adsorption devices
General Wards & Clinics
Natural and mechanical ventilation
Central air conditioning
UV disinfection
Chemical disinfection methods
Monitoring of Air Purification Effects
Monitoring Requirements
High-risk departments: Monitored quarterly
Clean operating rooms: Monitored during construction/renovation and after filter replacement
Outbreak situations: Immediate monitoring and pathogen testing
Monitoring Methods
Clean Areas
Comply with GB50333 requirements. Each clean room monitored at least annually.
Non-Clean Areas
Comply with GB15982 requirements for monitoring methods and results.
