
🧬Class II Cabinets Buyers Guide
Laboratory Class II cabinets, also known as Class II microbiological safety cabinets (MSCs) or biological safety cabinets, are critical for protecting operators, samples, and the laboratory environment when working with biological agents. Widely used in clinical, pharmaceutical, research, and life science laboratories, Class II cabinets provide a controlled, sterile workspace with HEPA-filtered airflow. Choosing the right cabinet is essential for safety, compliance, and efficient laboratory workflows.
🔍 Key Considerations When Selecting a Laboratory Class II Cabinet
1. Type of Class II Microbiological Safety Cabinet
In the UK and Europe, Class II cabinets are typically specified according to BS EN 12469, the standard covering the performance and safety requirements of microbiological safety cabinets. Most laboratories will choose between cabinets based on their airflow configuration and exhaust requirements, rather than the North American subtype classifications. Common configurations include:
- Recirculating Class II Cabinets – The majority of filtered air is recirculated within the cabinet through HEPA filters, with a portion safely exhausted back into the laboratory. These are suitable for most microbiological and cell culture applications.
- Ducted (or Extract) Class II Cabinets – Connected to a building extraction system to remove filtered air from the laboratory. These may be preferred when working with certain hazardous materials or when additional containment is required.
- Low-energy or ECM fan cabinets – Modern designs that use electronically commutated motors and optimised airflow systems to improve energy efficiency while maintaining containment performance.
Selecting the appropriate cabinet configuration should be based on the type of biological work being carried out, laboratory risk assessments, and facility requirements.
2. Protection Levels
Class II cabinets provide three levels of protection:
- Operator protection through inward airflow at the front aperture
- Product protection via vertical laminar downflow
- Environmental protection using HEPA-filtered exhaust air
Ensure the cabinet complies with relevant standards such as EN 12469.
3. Airflow and Filtration
High-efficiency particulate air (HEPA) filters are central to cabinet performance. Key airflow considerations include:
- Downflow uniformity
- Inflow velocity
- HEPA filter efficiency (typically 99.995% at 0.3 microns)
Proper airflow ensures contamination control and safe containment.
4. Cabinet Size and Ergonomics
Laboratory Class II cabinets are available in various widths, typically ranging from 900 mm to 1800 mm. Consider:
- Available laboratory space
- Number of users
- Equipment to be used inside the cabinet
Ergonomic features such as angled fronts, adjustable stands, and low noise levels improve user comfort during prolonged use.
5. Energy Efficiency and Noise Levels
Modern cabinets increasingly use energy-efficient EC fans and optimised airflow systems. Benefits include:
- Reduced energy consumption
- Lower operating noise
- Improved sustainability
These features are particularly important in shared laboratory environments.
6. Control Systems and Monitoring
Advanced control systems enhance safety and usability. Look for:
- Digital displays showing airflow status
- Visual and audible alarms
- Filter saturation monitoring
- Automatic airflow compensation
These systems support safe operation and regulatory compliance.
7. Installation, Validation, and Maintenance
Class II cabinets require professional installation and regular servicing. Consider:
- On-site commissioning and validation
- Routine airflow and filter integrity testing
- Availability of service support and spare parts
Ongoing maintenance is essential for continued compliance and safety.
🛠 Example: Haier Biomedical Class II Microbiological Safety Cabinets
Haier Biomedical manufactures a range of Class II microbiological safety cabinets designed to provide operator, product, and environmental protection when working with biological agents. These cabinets are widely used in microbiology, biomedical research, pharmaceutical laboratories, and healthcare environments. Many models are certified to the BS EN 12469 standard, which is commonly required for laboratories in the UK and Europe.
Examples include:
- Haier Biomedical HR Series Class II Microbiological Safety Cabinets – Designed for microbiology and cell culture work, featuring HEPA or ULPA filtration, vertical laminar airflow, and ergonomic workspaces.
- Haier Biomedical Standard Biosafety Cabinets – Energy-efficient cabinets with DC fans, LED lighting, and airflow monitoring to maintain stable containment conditions.
- Haier Biomedical Touchscreen or Smart Series Cabinets – Incorporate digital displays, airflow sensors, and alarm systems to support safe and compliant laboratory operation.
These cabinets demonstrate the typical features available in modern Class II microbiological safety cabinets, including high-efficiency filtration, airflow monitoring, and ergonomic design to support safe laboratory practices.
💡 Quick Buying Tips
- Identify the correct Class II type for your application.
- Ensure compliance with EN 12469 and relevant laboratory standards.
- Choose the correct cabinet size based on workflow and space.
- Consider energy efficiency, noise levels, and ergonomic design.
- Plan for installation, validation, and ongoing servicing.
🤔 Need Further Help?
If you are unsure which Laboratory Class II cabinet best suits your laboratory or application, please consult one of our sales team who will be happy to talk through your requirements. You can find best contact details at https://www.wolflabs.co.uk/contact-us
Product Category: Class II Cabinets
Manufacturer: Haier Biomedical UK






































