By Fumair Ltd
We supply both belt-driven and direct-drive centrifugal fans, each offering specific advantages depending on the application. Belt-driven fans have been largely superseded by modern direct-drive alternatives. However, they remain in use for certain critical applications where redundancy is essential, for example, in systems that require a run-and-standby motor configuration. In these cases, dual motors are fitted to allow automatic switchover in the event of a failure, maintaining continuous extraction without downtime. Direct-drive fans, are now the standard choice for most laboratory and LEV systems. The impeller is mounted directly onto the motor shaft, resulting in fewer moving parts, lower maintenance requirements, and a more compact footprint. They are also quieter and more energy-efficient, particularly when paired with an inverter (VSD) for variable speed control.
The AFA5000 is an advanced room pressure and airflow controller designed for laboratories requiring precise environmental control. It continuously monitors and regulates room pressure, airflow rates, and optional parameters such as temperature and humidity, ensuring safe and stable working conditions across the entire laboratory space. Typically installed in high-containment or energy-sensitive environments, the AFA5000 manages both supply and extract airflow via motorised dampers or variable-speed fan control. It supports a range of control strategies, including pressure tracking, flow tracking, and volumetric offset, to maintain desired pressure differentials between rooms, corridors, and adjacent spaces. This is essential in containment laboratories (e.g. CL3/CL4), cleanrooms, and facilities handling hazardous substances. The system integrates seamlessly with fume cupboards operating under VAV control, enabling coordinated operation between individual workstations and the wider ra building management system (BMS), providing real-time data, alarm notifications, and remote adjustment capabilities. Room ventilation system. It can operate as a standalone controller or interface with With configurable digital and analogue I/O, intuitive touchscreen interfaces, and robust sensor support, the AFA5000 offers comprehensive room-level control in both new builds and retrofit applications.
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The AFA1000 is a highly versatile, microprocessor-controlled airflow monitors for ducted fume cupboards, available in both constant volume and variable air volume (VAV) configurations. They deliver precise, real-time face velocity monitoring to ensure safe operating conditions and full compliance with BS EN 14175. In VAV setups, the motitors function as an intelligent controller, modulating airflow in direct response to sash position. By controlling a motorised damper or signalling a variable-speed extract fan, they maintain a constant face velocity while adjusting the air volume in real time. This minimises energy consumption, particularly HVAC load, when the sash is closed or partially open, offering substantial savings on running costs. VAV systems are especially effective in laboratories where multiple fume cupboards share a common extract system. By dynamically regulating airflow at each unit, the system ensures that overall extract capacity is balanced and efficient, without over-extracting from unoccupied cupboards. The AFA1000 features a clear digital display, configurable alarm thresholds, and high-visibility LED and audible alarms for unsafe airflow conditions. Outputs can interface with building management systems, remote alarms, fan controls, or sash interlocks, while a secure, user-friendly interface simplifies commissioning and maintenance.
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The Chevron is a compact, self-contained airflow indicator designed specifically for local exhaust ventilation (LEV) systems. Battery-powered, it continuously monitors negative static pressure within extract ductwork and provides immediate visual indication of airflow status. A moving chevron arrow on the front panel confirms that adequate airflow is present. Should pressure drop by more than 20% from the calibrated baseline, the device activates a flashing red ‘X’ along with an LED warning to alert users to insufficient extraction. The unit samples airflow every five seconds and is compliant with HSG258 and COSHH monitoring recommendations. The Chevron is easy to install using supplied straps or self-tapping screws. It is powered by two standard AA batteries, offering over 12 months of continuous operation without the need for hardwiring or external power. Chevron is suitable for canopy hoods, localised extraction arms, benchtop enclosures, and other LEV systems requiring a low-cost reliable airflow indication solution.
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For flammable solvents or fire-risk substances we supply the full range of Asecos fire-rated safety cabinets, certified to DIN EN 14470-1 and designed for the safe storage of flammable liquids and fire-sensitive substances in laboratories. Available in 30 or 90-minute fire resistance Certified to DIN EN 14470-1 for compliance with UK and EU fire safety regulations Wide range of internal shelves, trays, pull-out drawers and accessories Automatic self-closing doors/drawers with thermal locking in the event of fire Integrated exhaust ports for safe ventilation and fume extraction Freestanding and underbench models available Range of sizes to suit fume cupboards and laboratory furniture Whether used beneath a fume cupboard or as a stand-alone unit, Asecos fire-rated cabinets provide robust protection, helping to prevent escalation in the event of a fire and supporting COSHH compliance in higher-risk areas.
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