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Fume Hood Type:
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Your choices are...
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General Purpose
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General purpose hoods, the most common type, are used to prevent exposure to toxic, irritating, or noxious chemical vapors and gases. A face velocity of 100 feet per minute (fpm) provides efficient vapor capture while reducing hood turbulence.
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Radioisotope
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Radioisotope hood systems are ideally made from welded stainless steel to ensure against absorption of radioactive materials. In order to comply with licensing requirements, radioisotope hoods require a face velocity of 125 fpm.
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Perchloric Acid
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Perchloric acid hoods have wash-down capabilities to prevent the buildup of explosive perchlorate salts within the exhaust systems.
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Other
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Other unlisted hood type.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Hood Design:
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Your choices are...
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Conventional
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Conventional hoods represent the original and most simple of the hood design styles. With a conventional hood the volume of air exhausted is constant, regardless of sash height.
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Bypass
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Bypass hoods have an added engineering feature and are considered a step up from conventional hoods. An air bypass incorporated above the sash provides an additional source of room air when the sash is closed.
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Auxiliary Air
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With this type of hood a dedicated duct supplies outside air to the face of a bypass hood. The main advantage of an auxiliary air hood is the energy savings realized by reducing the amount of heated or air conditioned room air exhausted by the hood.
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Variable Air Volume
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Variable air volume (VAV) hoods are the most sophisticated of the hood types, requiring technically proficient design, installation and maintenance. The primary characteristic of VAV hoods is their ability to maintain a constant face velocity as sash height changes.
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Ductless
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Ductless fume hoods have a conventional hood design but are self contained and recirculate air back into the lab after filtration occurs. These hoods use either High Efficiency Particulate Air (HEPA) filters or Activated Carbon Filtration technology to remove contaminants from the hood air.
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Other
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Other unlisted hood design.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Sash Options
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A sash is the front panel of the fume hood that can be opened and closed to maximize access and minimize airflow.
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Your choices are...
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Vertical Sash
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Sash lifts vertically.
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Horizontal Sash
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Sash lifts horizontally.
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Combination Sash
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Sash lifts both vertically and horizontally.
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Other
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Other unlisted sash option.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Hood Face Velocity:
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The velocity of air flow across the imaginary plane running between the bottom of the sash to the work surface.
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Search Logic:
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Required Airflow:
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The amount of airflow required to achieve a laminar flow velocity of 100 feet per minute.
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Search Logic:
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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