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Terra Part #PriceShips in
304 Stainless Steel45"28"41"2 Blowers8"120 V 2900-21 $3,9985-9 Days2
304 Stainless Steel45"28"41"2 Blowers8"240 V 2900-21-220 $3,99825-35 Days3
Polypropylene45"28"41"2 Blowers8"120 V 2900-20 $3,4821-3 Days4
Polypropylene45"28"41"2 Blowers8"240 V 2900-20-220 $3,48225-35 Days5
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Product Details

• High-capacity ductless fume hood with dual 600 CFM blowers

• Activated carbon filters (order separately) remove common organic fumes to eliminate the need for ducting to a building exhaust system

• Not intended for use with chemical fumes, biohazards or compounds that can produce potentially toxic dust

• All-polypropylene hood construction ensures broad chemical resistance

• Open-bottom design for placement on any existing work surface

• Blower housing clips in place for easy filter replacement

• Vibration-isolating stands available separately

• Air speeds above 100 ft/min (0.51 m/s) below the sash, offering a high level of protection for operators

• Static-dissipative PVC sash provides splash protection with 5" of vertical working clearance

• Sash lifts out of the way to accommodate tall or bulky equipment

• LED illuminator provides comfortable lighting of the work space within the hood

• Built-in swing vane anemometer for validation purposes

Benchtop Ductless Exhaust Fume Hood

Standard Features

  • A Polypropylene construction
    Polypropylene construction resists acids and other chemicals
  • B Fan Filter Unit
    Dual 1200 CFM (2038.81 m³/h) blowers for safe containment: air velocity >180 fpm (0.91 m/s) with 5" (127 mm) vertical access
  • C Fluorescent light
    Fluorescent light
  • D Quick-release housing
    Quick-release blower/filter housing for fast, easy filter replacement
  • E air speed monitor
    Includes swing-vane air speed monitor

Optional Features

  • 1 Range of Work Station Choices
    Many work stations available. 2-piece design isolates blower vibration

Not Shown: Spill trays - Spill trays available

Features & Benefits

Features and Benefits

Ductless Exhaust Alternative

Ductless Fume Hoods: An Alternative to Laboratory Exhaust Systems

Exhaust Fume Filtration

Activated charcoal, the most common purification filtration medium, adsorbs chemicals with a molecular weight above 30 and a boiling point above 60°C. Carbon filters are also effective with many other chemicals because of their particular molecular structure.

Adsorption takes place in the active filter zone, the small cross-section of the filter bed in which the material to be removed comes in contact with the filtering medium. This active filter zone moves upward as the filter becomes saturated (see illustration). When it reaches the filter's top surface, there is an initial breakthrough by the contaminant gas; thereafter the percentage of contaminant gas that escapes filtration increases until total saturation of the filter is reached.

Ductless fume hoods manufactured by Terra use activated carbon filters to eliminate most nuisance fumes and can be used in conjunction with HEPA filtration. For more hazardous chemicals like strong acids and bases, specialized Labconco filtered fume hoods can be equipped with a wider range of filters and include an array of safety sensors for breakthrough detection.

Enhancing Filter Performance

To optimize filtration efficiency, any ductless exhaust fume system must ensure that the exhaust stream is exposed to the purification medium for an adequate time. Terra exhaust purification systems satisfy this condition in several ways.

First, our specially selected impeller ventilators are designed to ensure the optimal linear velocity of the airstream—sufficient to maintain a negative pressure in the work area that prevents backflow, but low enough to allow adequate adsorption of fumes by the filtering medium. Our pre-filters also extend exposure time by reducing the airflow through the filter.

Monitoring Filter Effectiveness

A ductless exhaust fume system needs to be monitored in two areas. The user must detect the period between initial contaminant breakthrough and the point at which the contaminant gas reaches the Threshold Limit Value (TLV) for that substance. The velocity of the airstream must also be monitored to ensure an adequate negative pressure and to detect ventilator failure.

Through periodic testing of the exhaust airstream, you can determine the useful filter life in your particular application and gauge filter effectiveness with an elapsed time meter.

An electronic airflow velocity monitor also helps users ensure safe, effective operation and provides an alarm when velocity falls below a user-defined threshold.

Put Safety First!

Avoid filter use in applications involving very toxic substances, very high volumes of contaminants, and unknown or highly volatile chemical reactions. Always make sure that filters are promptly changed when the Threshold Limit Value (TLV) has been reached for any contaminant gases present.

Dual Ventilation Blower with Quick-Release Clips

Dual fans ensure fast, efficient ventilation of micro-contaminants. Quick-release clips along the polyproylene filter housing allow fast, easy filter replacement; unit lifts off hood for easy servicing.

Swinging Vane Anemometer

An air speed monitor is built into the body of the hood at the sash-level. Operators can verify safe exhaust speeds before beginning fume-generating work beneath the hood.

Dual Exhaust Fans

Powerful blowers draw fumes upward through carbon and HEPA filters before releasing the air back into the room. Outside air backfills into the hood through the sash opening, preventing the escape of fumes.

Available Accessories

Popular Accessories

For a full list of accessories, select a product then click Choose Accessories on that product page.
  • UV Germicidal Lamp
    The V-Ray germicidal UV lamp is installed within a Terra hood to inhibit microbial growth on the work surface
  • Two-Piece Vibration Isolation Stands
    Hood stands are available in a two-piece configuration that isolates vibration generated by the hood fan, reducing motion sickness associated with microscopy work (shown with laminate work surface).
  • Stainless Steel Spill Tray
    Stainless steel spill tray safely contains a broad range of chemicals
  • 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.

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