Class I Animal Transfer Cabinet

What is the Class I Animal Transfer Cabinet?

A Class I animal transfer cabinet provides a HEPA-exhausted work zone for cage changing and animal handling. It protects operators and the room from allergens and aerosols during routine animal facility work.

Overview

The cabinet is sized for cages and racks, often 1200–1800 mm wide with a low work surface and a large sash opening for easy loading. Room air enters at 0.7–1.0 m/s and, after crossing the work zone, passes a HEPA filter before ducted discharge to atmosphere. Allergens from urine, dander and bedding, and microbial aerosols, are captured so that room air quality is protected. The work surface is stainless steel, and interior surfaces are smooth for frequent disinfection. Airflow alarms and a filter pressure gauge are standard. Some units include a waste chute or sealed waste port and a removable tray for bedding. The cabinet reduces operator exposure during cage changing, dosing and tissue collection in animal facilities.

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?

• Wide low work surface for cages and racks
• Inflow velocity 0.7–1.0 m/s at the sash
• HEPA exhaust ducted to atmosphere
• Smooth stainless surfaces for disinfection
• Optional sealed waste chute or port
• Airflow alarm and filter pressure gauge

What are the technical specifications?

A typical class i animal transfer cabinet configuration offers cabinet class of Class I, inflow velocity of 0.7–1.0 m/s, width of 1200–1800 mm, work surface of Stainless steel 304, HEPA grade of H14, ≥ 99.97 % at 0.3 µm and exhaust of Ducted to atmosphere. 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 Class I Animal Transfer Cabinet is used in cage changing and bedding disposal, animal dosing and handling, tissue collection and allergen control in animal rooms. 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 Class I Animal Transfer Cabinet?

Choose an animal transfer cabinet for cage changing and handling where allergens and aerosols must be controlled. Confirm width for cage racks and the waste handling method. RFQ: cage dimensions, throughput, exhaust route, waste port requirement and noise limits.

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.