Class II Type B Biosafety Cabinets

BTE Series Benchtop Biofume™ Hood

Germfree BTE Series Class II BSC
The Class II, Type B Laminar Flow Biological Safety Cabinet provides protection for the user and the product from particulate, gases/fumes and aerosol hazards. The work area is continuously bathed with positive pressure ISO 5/Class 100 HEPA-filtered air while creating a negative pressure airflow into the cabinet to provide user protection. All of the air entering the hood is ducted/vented to the outside of the building.

The BTE Series (Class II, Type B) of Laminar Flow Biological Safety Cabinet are designed for the safe handling of low to moderate risk agents in laboratories and other settings. These biosafety chambers eliminate cross-contamination and accidental release of pathogenic microorganisms or carcinogenic aerosols to the outside atmosphere. Other applications include handling materials such as pollen, powders, allergens, dust, pathogen-free animals and plants.

The work area is bathed with a HEPA-filtered unidirectional (laminar) flow ISO 5/Class 100 air to protect the product. Further, the exhaust air is HEPA-filtered to protect the environment from particulate and aerosol hazards. This filter removes organisms and particulates 0.3 micron in size with an efficiency of 99.99%. The laminar flow principle consists of moving individual streams of unidirectional, ultra-clean air along parallel lines with minimal turbulence. This Class II, Type B2 Biological Safety Cabinet is a 100% Total Exhaust unit. The BTE must be ducted (vented) to the outside of the building as there is absolutely no recirculation of air in the cabinet. This total exhaust feature makes the B2 hood suitable for not only handling particulates, but also fumes and gases.

Germfree’s Biological Safety Cabinets are Constructed of All-Welded Stainless Steel With a Pharmaceutical Grade Finish.

The BTE Biological Safety Cabinets are constructed of quality all-welded stainless steel with a pharmaceutical grade finish. The fluorescent light housing is externally mounted to provide optimum lighting into the work area. The front viewing panel allows for additional ambient light and visibility into the work area and has a unique, recessed, contoured shape, which creates an aerodynamic flow pattern and allows the operator to lean into the work area. It is this combination that produces the protective barrier for the operator by containing hazardous materials within the biosafety chamber. This also greatly enhances user comfort. The viewing panel is hinged so it can be easily opened for cleaning and placement of larger objects into the work area. The stainless steel work tray can also be removed for ease of cleaning.

All-welded stainless steel stands are available at a fixed sitting or standing work height. For additional information and available options please refer to the unit specification sheet.

The BTE Series of Vertical Laminar Flow Biological Safety Cabinets passes the Biological Tracer Containment tests of the National Institutes of Health (NIH), the National Cancer Institute (NCI), and the National Sanitation Foundation (NSF).

Read more about Validation Services offered by Germfree.

Product Specifications

Overall Dimensions:
  • BTE-3SSRX: 36″ wide • 34.75″ deep • 58″ high
  • BTE-4SSRX: 48″ wide • 34.75″ deep • 58″ high
  • BTE-6SSRX: 72″ wide • 34.75″ deep • 58″ high
  • *Light housing and control panel adds an additional 4″ to depth.

Work Area Dimensions:
  • BTE-3SSRX: 36″ wide • 22″ deep • 29″ high
  • BTE-4SSRX: 48″ wide • 22″ deep • 29″ high
  • BTE-6SSRX: 72″ wide • 22″ deep • 29″ high


  • Outer cabinet and work surface are welded stainless steel with a #4 pharmaceutical grade finish.
  • Front lifting viewing panel is easily removed and is gasketed to provide a proper seal when in place.
  • Ergonomic front panel is concave permitting operator to lean into work area, enhancing user comfort.
  • High capacity motor/blower system with speed control to extend the life of the HEPA filter.
  • Supply and exhaust HEPA filters are parallel to work area and each other to prevent turbulence.
  • Exhaust motor-blower not included. System must be balanced upon installation.
  • Stainless steel filter screen is removable for easy cleaning.
  • Removable stainless steel work tray facilitates easy clean up and decontamination.
  • Fluorescent lights are externally mounted to minimize heat build-up.
  • IV hanging bar with 12 hooks in work area.
  • Separate lighted power ON/OFF indicator switches for blower and lighting.
  • Electrical is 115 Volt, 60 Hz (220/50-60 Hz also available)
  • Ten foot power cord with molded grounded plug.
  • Audible low pressure alarm to provide fail-safe operation.

    • Stainless Steel Stand 30″ or 36″ High in 2′, 3′, 4′, and 6′ widths
    • integrated stand

    • Welded Square Tube Stainless Steel Stand with Electric Hydraulic Height Adjustment 30″ to 39″ in 2′, 3′, 4′, and 6′ widths
    • prog_elect_stand

    • Stainless Steel Table – Custom sizes built to your specifications
    • table

    • Bin Cart
    • bin_cart_withbins

    • Duplex Electrical Outlet Installed In Work Area
    • duplex outlet

    • Gas shock lift for front viewing panel
    • gas_shock_lift_for_front_window

    • Exhaust Transition available for all models of BTE Series
    • exhaust transition

    • Stopcock for Air, Gas or Vacuum
    • stopcock

    • Stand Casters, 2 Locking welded to stand
    • stand_casters

    • Sealed Data Port – Passage of 4 cables possible with individual adjustable diameters between 0.16″- 01/27″
    • data port

    • Ergonomic Task Chair Anti-Bacterial, Anti-Microbial Vinyl Covering
      Available Colors Include: Charcoal ・ Wine ・ Teal ・ Navy ・ Black
    • task_chair

    BTE Class II BSC Diagrams

  • BTE-3SSRX:
  • bte 3 diagram

  • BTE-4SSRX:
  • bte 4 diagram

  • BTE-6SSRX:
  • bte 6 diagram



    gsa-buttonGermfree is a GSA Schedule contractor. GSA customers please click here.

    Additional Equipment Information:

    Read more about Germfree's unique Total Customer Care Plan.

    Download Manuals

    Contact Us

    Four Sunshine Blvd
    Ormond Beach, Florida 32174
    +1 386-265-4360