Waldner Secuflow laboratory fume cupboards

Significance of the Topic

The Secuflow family of laboratory fume cupboards represents a major advancement in lab safety, energy efficiency and ergonomic design. By combining aerodynamic flow science with user-oriented features, these units reduce operational costs and improve containment, meeting ever-stricter international standards.

Objectives and Overview of the Study

This whitepaper documents the development, testing and performance of the Secuflow series, including standard bench-mounted models, high-thermal-load EN7 variants, an ionization-enhanced version and a recirculating-air Green Fume Hood (GFH). The goal is to demonstrate how sophisticated flow technology, optimized ducting and integrated monitoring yield secure and cost-effective laboratory environments.

Methodology and Instrumentation

A comprehensive test program was conducted in accordance with EN 14175 (Parts 2, 3, 4, 6 and 7) and ASHRAE 110 to evaluate containment under isothermal and high-thermal conditions. A SMEPAC trial quantified particulate adhesion in the Ionic model. Key instrumentation and controls include:

• Supportive two-chamber airflow manifolds and aerodynamically profiled sills
• Airflow Controllers and Flow Alarm Zones (FAZ) with sash-position detectors
• Temperature sensors and over-temperature alarms in EN7 variants
• Ionization electrodes integrated in side-post and worktop ducts
• Modular AMFC™ filter units and Neutrodine® cartridges with laboratory air-quality sensors in GFH

Main Results and Discussion

The Secuflow achieves equivalent or superior containment compared to conventional units with 33% lower exhaust rates (270 m3/h per linear meter vs. ≥400 m3/h). EN 14175 robustness tests at 900 mm sash opening confirm stable performance even under high thermal loads (up to 4 kW/m). The Ionic model eliminated residual particulate buildup through active ion discharge. The GFH demonstrated safe recirculating-air operation, maintaining filter integrity and room air quality without building exhaust.

Benefits and Practical Applications

Key advantages include:

• Lower energy and ventilation costs through reduced air exchange rates
• Enhanced operator safety under dynamic conditions and complex experiment setups
• Modular adaptability for acids, solvents, particulate work and thermal processes
• Integrated digital monitoring and alarms for airflow, temperature and filter saturation
• Flexibility to retrofit existing labs or operate standalone in facilities with limited exhaust capacity

Future Trends and Opportunities

Advances in sensor networks and adaptive control promise further energy savings and real-time risk management. Integration with Building Management Systems, AI-driven airflow optimization and novel filter chemistries (e.g. multifunctional polymeric media) will expand capabilities for handling emerging contaminants and decentralized lab configurations.

Conclusion

The Secuflow series delivers a cohesive portfolio of fume cupboards tailored to diverse laboratory challenges. By prioritizing flow science, modular instrumentation and eco-friendly operation, these products set a new benchmark for safety, efficiency and user comfort in modern analytical environments.

References

• EN 14175:2012, Parts 2–7, European Committee for Standardization
• ASHRAE 110–1995, Method of Testing Performance of Laboratory Fume Hoods
• AFNOR NF X 15-211, Industrial Safety—Laboratory Fume Hood Filter Performance