Floor-Standing Class I Biosafety Cabinet

What is the Floor-Standing Class I Biosafety Cabinet?

A floor-standing Class I biosafety cabinet provides a large work area at standing height for bulky equipment or multiple operators. It is used where benchtop units cannot accommodate the process or equipment size.

Overview

This cabinet stands on its own base frame with castors or levelling feet, giving a work aperture at roughly 850–950 mm and an internal volume large enough for a centrifuge, shaker or large glassware. Widths range from 1500 to 2400 mm. Airflow follows the Class I principle: room air enters at 0.7–1.0 m/s, crosses the work surface and leaves through a HEPA filter, usually ducted to the atmosphere. A counterbalanced sash, interior lighting and a stainless work surface are standard, with airflow alarms and a filter pressure gauge. The rigid frame supports heavier loads than a benchtop cabinet, and the open stand allows cleaning beneath. A ducted installation and a dedicated exhaust fan are normally required, and airflow must be verified at commissioning.

How does it work?

A Class I cabinet works like a ventilated enclosure with a single HEPA-filtered exhaust path. Room air is pulled through the front opening at an inflow velocity of about 0.7–1.0 m/s, sweeps across the work surface, and carries aerosols and particles away from the operator. The air then passes a HEPA filter rated at least 99.97 % efficient at 0.3 µm before being discharged, either back into the room through a recirculating arrangement or, more commonly, to the atmosphere through a duct. Because there is no filtered supply air over the work zone, the cabinet does not protect the sample from contamination. Cabinets have a stainless steel work surface, a glass or polycarbonate sash, interior lighting and usually a UV lamp for surface decontamination between uses. Airflow alarms and a front grille complete the design; performance is confirmed by filter leak and airflow testing.

What are the key features?

• Self-supporting frame with castors or feet
• Working height 850–950 mm for standing use
• Width 1500–2400 mm for bulky equipment
• Single-pass HEPA exhaust, usually ducted
• Counterbalanced sash and interior lighting
• Airflow alarm and filter pressure gauge

What are the technical specifications?

A typical floor-standing class i biosafety cabinet configuration offers cabinet class of Class I, inflow velocity of 0.7–1.0 m/s, width of 1500–2400 mm, internal height of 900–1200 mm, working height of 850–950 mm and HEPA grade of H14, ≥ 99.97 % at 0.3 µm. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Floor-Standing Class I Biosafety Cabinet is used in large equipment enclosures, high-volume sample handling, veterinary and agricultural work and industrial hygiene sampling. Across the wider Class I Cabinets class, laboratories also deploy it for low-risk microbiology, centrifuge and equipment enclosures and veterinary and agricultural work.

Which standards and certifications apply?

Relevant standards and methods include EN 12469 (biosafety cabinets), NSF/ANSI 49 (biosafety cabinetry), ISO 14644-1 (cleanroom classification), GB 19489 (biosafety laboratory requirements) and IEC 61010-1 (safety requirements for electrical equipment). Certification candidates for this model are CE and ISO 9001 manufacturing; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Install the cabinet away from doors, vents and high-traffic areas, with clearance for service and filter replacement. If ducted, verify the exhaust fan and duct are dedicated and that airflow cannot fall below the alarm threshold; an undersized or blocked duct can reverse the internal flow. Confirm filter integrity and inflow velocity at installation and at least annually, and record results. Reduce clutter inside the cabinet, since bulky items disturb airflow and reduce protection. Clean the work surface before and after use, use UV lamps only as a supplement to chemical disinfection, and never rely on UV for penetrating surfaces. Confirm that the exhaust discharge point meets local requirements.

How do I select the right Floor-Standing Class I Biosafety Cabinet?

Choose the floor-standing model when equipment is too large or heavy for a benchtop cabinet and operators work standing. Confirm floor loading, duct route and make-up air. RFQ: internal dimensions, equipment footprint, exhaust fan capacity and working height.

How does it compare with other Class I Cabinets variants?

Choose a Class I cabinet when operator and environmental protection are needed but the sample does not require protection, for example for low-risk microbiology, homogenising, or housing a centrifuge or shaking device. Confirm the inflow velocity and HEPA exhaust arrangement, and decide whether exhaust goes to the atmosphere by duct or is filtered and recirculated, since recirculation is not acceptable for many agents. Match the internal height to the equipment housed and the external footprint to the bench or floor space. Check whether the cabinet must be connected to an exhaust system and whether a thimble or direct connection is used. Confirm certification to EN 12469 or NSF/ANSI 49 where applicable, and plan annual recertification. Class I cabinets are not suitable when sterile product protection is required.