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A laminar flow hood, also called a laminar flow cabinet or laminar flow workstation, is a ventilated laboratory enclosure that uses HEPA filtration and a controlled, unidirectional airflow to create a particle-free work zone. Unlike a biosafety cabinet, which is designed to protect both the user and the sample from biological hazards, a laminar flow hood is designed primarily to protect the product or sample from contamination by airborne particles in the lab environment.
Laminar flow hoods are standard equipment in microbiology, cell culture, electronics manufacturing, pharmaceutical compounding, IV preparation, and any application where maintaining a clean, particulate-free workspace is critical. All units offered by LabRepCo use HEPA filters that capture 99.97% of particles 0.3 microns or larger, delivering a Class 100 (ISO 5) clean air environment at the work surface.
Laminar flow hoods are available in two primary airflow configurations. The right choice depends on your application, workspace dimensions, and the nature of the work being performed.
| Vertical Laminar Flow | Horizontal Laminar Flow | |
| Airflow Direction | Downward from ceiling-mounted HEPA filter | Outward from rear-mounted HEPA filter toward operator |
| Best For | Sensitive procedures where downward airflow is preferred; general research labs | IV preparation, pharmacy compounding, and procedures requiring front-to-back particle sweep |
| Operator Exposure | Lower – downward airflow moves away from the operator’s face | Higher – airflow moves toward operator; not suitable for hazardous materials |
| USP 797/800 Compliance | Vertical models can meet requirements in appropriate setups | Horizontal models are commonly used for non-hazardous IV compounding per USP 797 |
Important: Laminar flow hoods do NOT protect the operator from biological agents or hazardous chemicals. If your work involves infectious materials or toxic compounds, a biosafety cabinet is required instead.
LabRepCo carries laminar flow hoods and workstations from NuAire (AireGard ES series) and Erlab (Captair Flow series). Browse by application below.
| Category | Description | Browse |
| Laminar Flow Workstations | Vertical and horizontal laminar flow workstations for research labs, electronics, and general clean bench applications. NuAire and Erlab models. | → View All |
| Pharmacy Horizontal Laminar Flow Hoods | Horizontal laminar flow hoods specifically configured for USP 797 non-hazardous IV compounding and pharmacy applications. NuAire AireGard ES series. | → View Pharmacy |
This is the most common point of confusion when selecting clean air equipment. The distinction is critical:
If you are unsure which type of clean air equipment is right for your application, contact a LabRepCo specialist at 800-521-0754. We also carry a full range of biological safety cabinets for applications requiring personnel and environmental protection.
They are the same thing. ‘Laminar flow hood,’ ‘laminar flow cabinet,’ and ‘laminar flow workstation’ are interchangeable terms for the same class of equipment – a ventilated enclosure using HEPA filtration and unidirectional airflow to create a particle-free work environment.
No. A laminar flow hood provides product protection only – it does not protect the operator from biological aerosols or hazardous materials. Any work involving infectious agents, toxins, or volatile hazardous chemicals requires a biosafety cabinet. Using a laminar flow hood for work that requires a BSC is a serious safety violation.
All laminar flow hoods carried by LabRepCo use HEPA filters rated at 99.97% efficiency at 0.3 microns, delivering a Class 100 (ISO 5) clean air environment at the work surface. This meets the requirements for most sensitive research, electronics, and non-hazardous pharmacy compounding applications.
Unlike biosafety cabinets, laminar flow hoods do not have a mandatory annual certification requirement under NSF/ANSI 49 (which covers BSCs). However, regular HEPA filter integrity testing and airflow velocity verification is strongly recommended – and required for hoods used in regulated pharmacy environments under USP 797. LabRepCo can advise on certification schedules appropriate for your application.
Vertical laminar flow hoods supply filtered air from above, flowing downward over the work surface. Horizontal laminar flow hoods supply air from the back of the cabinet, blowing forward toward the operator. Horizontal flow is preferred for IV preparation and pharmacy compounding because it sweeps particles away from the work area. Vertical flow is preferred for applications where airflow toward the operator should be minimized.
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