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Terra Part #PriceShips in
240 V304 Stainless Steel49"30"65" 2400-12-220 32701 $7,01130-40 Days2
240 V304 Stainless Steel61"30"65" 2400-13-220 32702 $9,09430-40 Days3
240 V304 Stainless Steel73"30"65" 2400-14-220 32703 $9,65130-40 Days4
240 V304 Stainless Steel97"30"65" 2400-15-220 32704 $10,32430-40 Days5
240 VPowder-Coated Steel49"30"65" 2400-74-220 63853 $7,37030-40 Days6
240 VPowder-Coated Steel61"30"65" 2400-17-220 32706 $5,57030-40 Days7
240 VPowder-Coated Steel73"30"65" 2400-18-220 32707 $6,32230-40 Days8
240 VPowder-Coated Steel97"30"65" 2400-19-220 32708 $6,68630-40 Days9
120 V304 Stainless Steel49"30"65" 2400-12 11429 $6,53230-40 Days10
120 V304 Stainless Steel61"30"65" 2400-13 11430 $7,16130-40 Days11
120 V304 Stainless Steel73"30"65" 2400-14 11431 $8,12830-40 Days12
120 V304 Stainless Steel97"30"65" 2400-15 11432 $8,59730-40 Days13
120 VPowder-Coated Steel49"30"65" 2400-16 11433 $5,19930-40 Days14
120 VPowder-Coated Steel61"30"65" 2400-17 11434 $5,57030-40 Days15
120 VPowder-Coated Steel73"30"65" 2400-18 11435 $6,32230-40 Days16
120 VPowder-Coated Steel97"30"65" 2400-19 11436 $6,68630-40 Days17
240 V304 Stainless Steel49"30"65" 2400-16-220 32705 $5,19930-40 Days18
120 V304 Stainless Steel49"30"65" 2400-70 63844 $9,63630-40 Days19
240 V304 Stainless Steel49"30"65" 2400-70-220 63845 $9,63630-40 Days20
120 V304 Stainless Steel61"30"65" 2400-71 63846 $12,23830-40 Days21
240 V304 Stainless Steel61"30"65" 2400-71-220 63847 $12,23830-40 Days22
120 V304 Stainless Steel73"30"65" 2400-72 63848 $12,93630-40 Days23
240 V304 Stainless Steel73"30"65" 2400-72-220 63849 $12,93630-40 Days24
120 V304 Stainless Steel97"30"65" 2400-73 63850 $13,77730-40 Days25
240 V304 Stainless Steel97"30"65" 2400-73-220 63851 $13,77730-40 Days26
120 VPowder-Coated Steel49"30"65" 2400-74 63852 $7,37030-40 Days27
120 VPowder-Coated Steel61"30"65" 2400-75 63854 $7,83530-40 Days28
240 VPowder-Coated Steel61"30"65" 2400-75-220 63855 $7,83530-40 Days29
120 VPowder-Coated Steel73"30"65" 2400-76 63856 $8,77430-40 Days30
240 VPowder-Coated Steel73"30"65" 2400-76-220 63857 $8,77430-40 Days31
120 VPowder-Coated Steel97"30"65" 2400-77 63858 $9,2301-3 Days32
240 VPowder-Coated Steel97"30"65" 2400-77-220 63859 $9,23030-40 Days33
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Product Details

• Safely vents fumes away from the work surface

• Includes explosion-proof blower mounted for negative-pressure venting.

• Select models include explosion-proof light

• Rigid steel, free-standing structure isolates the work surface from vibrations (add workstations at checkout)

• Select powder-coated or stainless steel to meet chemical compatibility requirements

• Not intended for use with biohazards or compounds that produce toxic dusts

• Select desired work surface and vapor-sealed or explosion-proof light

• Proper installation of explosion proof equipment is critical to maintaining the explosion-proof protection aspects of the system. Therefore all wiring for explosion proof systems should be done in the field per local code by a licensed electrician.

Explosion-Proof Hoods

  • Exploson-Proof Ductless Fume Hood in Use Powder-Coated Explosion-Proof Ductless Fume Hood
Exploson-Proof Ductless Fume Hood in Use

Features & Benefits

Features and Benefits

Laminar Flow and Fume Hoods FAQs

Laminar Flow and Fume Hoods FAQs

Laboratory hoods serve a number of critical purposes in the lab environment.

Product protection from particulate contaminants in the lab environment, including microbes

Such hoods, often called laminar flow workstations or clean benches, use a flow of HEPA-filtered air to prevent influx of viable and non-viable particles into the enclosure and to sweep away any contaminants generated by the work process.

Protection of personnel and lab environment from substances generated inside the enclosure

For fume containment, laboratory fume hoods use a ducted ventilation system that maintains negative pressure. Where ducting is impractical, ductless hoods are also available for removal of non-hazardous contaminants (fumes or particles), using either HEPA or activated carbon filters.

Protection of product, operator and environment

Biological safety cabinets combine aspects of both hood types: a laminar flow of micro-filtered air and negative-pressure containment of bio-hazard fumes.

Laminar Flow Hoods
Vertical Laminar Flow Hood Airflow Diagram

Laminar flow hoods (also called laminar flow clean benches) force air through a HEPA or ULPA filter to create a clean work area free of nearly all contaminating particulates, including bacteria, mold spores and many viruses. These hoods use a vertical or horizontal airflow design. Both provide excellent protection of products from particulates and cross-contamination, but do not protect the operator or environment.

So why choose one over the other? Vertical laminar flow hoods (VLF Hoods) require less floor space, but more overhead clearance. In addition, a sash at the front of the VLF hood provides a barrier between air exiting the hood and the operator’s face. VLF hoods create turbulent air flow when air strikes the work surface, requiring sterile work to be performed above the work surface.

HLF hoods minimize air turbulence (and particle backflow) on the work surface except where equipment disrupts the horizontal airflow. However, they direct the airflow directly at the operator’s face and require more depth to accommodate placement of the fan filter unit at the rear of the hood.

Read more about the differences between horizontal and vertical laminar flow hoods

Fume Exhaust Hoods

Laboratory fume hoods draw air from the environment through the opening of the hood, allowing environmental contaminants into the work area. Thus, lab fume hoods do not offer a sterile environment or product protection. Instead, chemical fume hoods are designed to protect the operator from dangerous or irritating fumes and powders generated from work performed inside the hood.

In ducted fume hoods and canopy fume hoods, air passes out of the hood through a duct leading to an in-house ventilation system that contains and/or neutralizes hazardous materials.

Ductless Exhaust Hood Air Flow Diagram

In ductless fume hoods, fans draw exhaust air through a series of filters that remove irritating substances before release back into the room. Since these filters are not 100% efficient in removing all substances, ductless fume hoods are not advised in the presence of biohazards; however, they provide a convenient, cost-effective solution for operations involving irritating but non-hazardous fumes in facilities where an in-house HVAC system cannot be accessed.

Biosafety Cabinets

Biological Safety cabinets combine design aspects of both laminar flow and fume hoods. Filtered air is directed downward onto the work surface and then travels into a plenum through openings on the front and sides of the hood. Depending on the classification of the biosafety hood, some percentage of air is recirculated through a HEPA filter while the rest is directed out of the hood through an exhaust system. Thus, biosafety cabinets offer operator, environmental and product protection.

These laboratory safety cabinets (sometimes called IV hoods or compounding hoods) are ideal when preparing sterile medications such as chemotherapeutic agents that may pose a risk to the operator.

BSCs, BSLs, and ISO Classes

When it comes to working with hazardous or potentially infectious material, protecting personnel must be the primary concern. However, offering personnel protection does not have to come at the cost of risking product integrity. Class II BSCs provide protection to both personnel and product simultaneously. They maintain an ISO class 5 clean work area for product manipulation, while ensuring that exhaust air is filtered and ducted out of the environment. Thus, a class II BSC is the ideal solution when working with moderately hazardous material and both personnel and product safety are required.

Read more about these lab hoods here regarding their biological safety rating

Static-Dissipative PVC Sliding Shield, Side Panels

Sliding shield and side panels made of transparent, chemically resistant static-dissipative PVC help contain fumes and protect operator from spills (select preferred work surface and vapor sealed or explosion-proof light separately).

Easy-Glide Shield

Easy-glide counter-weighted sliding shield made of static-dissipative PVC helps protect operator from chemical splashes and fume exposure; extend fully down to optimize containment efficiency.

Explosion-Proof Power Switches

UL-rated explosion-proof switches are connected to the lights and blowers using specialized conduit with potted fittings. All electrical components are sealed to eliminate potential ignition points.

Available Accessories

Popular Accessories

For a full list of accessories, select a product then click Choose Accessories on that product page.
  • HEPA Filter Capture Micro-Contaminants
    HEPA (High-Efficiency Particulate Air) Filters rated 99.99% efficient with particles 0.3 microns and larger in diameter.
  • Activated Charcoal Filter
    Activated charcoal filters remove a wide range of chemicals from the airstream to allow ductless fume hood operation. Bonded charcoal minimizes void spaces, improves efficiency, reduces particle sloughing. Not for use with hazardous substances.
  • Vapor- and Dust-Sealed Lights
    Vapor- and dust-sealed fluorescent lights enhance safety in chemical fume hood applications. Impact-resistant polyester housing and acrylic diffuser with two F20T12 lamps for 20 Watts total energy usage; ideal for wet or damp locations.
  • Explosion-Proof 40W LED Light
    UL-listed for Class I, Division 1 and 2, Groups C and D areas, this low profile LED light produces 3,600 lumens and operates from 120 to 277VAC, 50/60Hz. The heat-dissipating housing increases the efficiency and lifespan of the LEDs.
  • Explosion-Proof Illuminator
    This incandescent illuminator is rated Class I, Div. 1 and 2 (Groups C and D); Class II, Div. 1 and 2 (Groups E and F); and Class III, Div. 1 and 2 (all groups); suitable for locations in which ignitable mixtures exist under normal conditions.
  • Work Station Drawers
    Available in ABS plastic or stainless steel, these cleanroom-compatible drawers come in a number of sizes and drawer configurations (6” top drawer/12” bottom drawer shown).
  • Isolated Work Surfaces in Many Materials
    Tables in many styles and materials, including dissipative laminate, chemical-resistant polypropyene and epoxy resin, are isolated from hood to reduce vibration (shown: solid stainless steel top with adjustable powder-coated legs).

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Manuals & Resources

Manuals & Resources

Ductless Exhaust Alternative

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