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	Chemical Fume Hood
		Chemical fume hoods are the primary engineering control used in the laboratory to protect against the inhalation of hazardous vapors and gases.
		A fume hood is a partially enclosed workspace that is exhausted, in most cases, to the outside of the building.
		Fume hoods are not to be used as a waste disposal mechanism except for very small quantities of volatile materials.
	ehs.uky.edu /classes/fumehood/train.html (2690 words)

	Chemical Fume Hood Handbook
		This fume hood, sometimes referred to as a makeup air fume hood, was developed as a variation on the bypass fume hood and reduces the amount of conditioned room air that is consumed.
		Fume exhaust duct connections, commonly called snorkels, elephant trunks or flex ducts, are designed to be somewhat mobile allowing the user to place it over the area needing ventilation.
		Hoods usually go into alarm mode either because the sash has been raised to a height at which the hood can no longer exhaust a sufficient amount of air, the building air exhaust system is not working properly, or there has been a power outage.
	www.research.northwestern.edu /research/ors/labsafe/hoods/index.htm (2327 words)

	Fume hood Summary
		In biological fume hoods the flow of sterile air is typically from the back of the cabinet toward the laboratory worker, and from the top of the fume hood downward across the opening at the front of the hood.
		The fume hood should be positioned in an area of the laboratory where there is less traffic back and forth, which lessens the turbulence of air outside the fume hood.
		Fume hoods were originally manufactured from timber, but now epoxy coated mild steel is the main construction material.
	www.bookrags.com /Fume_hood (1445 words)

	Environmental Health & Safety: Design Criteria for Laboratory Furniture and Fume Hoods
		Fume hood fans, blowers and drive mechanisms shall be located on the exterior (rooftop) of the building and shall be designed and located so they are readily accessible for visual inspection and maintenance.
		General Purpose VAV Fume Hoods shall be capable of varying the exhaust air volume in proportion to the hood face opening by either changing the speed of the exhaust blower or by adjusting a damper in the exhaust duct for general laboratory fume hood operations.
		Fume hood exhaust discharges shall be directed to the outside atmosphere and shall comply with applicable federal, state or local air emission standards.
	www.usg.edu /ehs/guidelines/fume_design.phtml (9077 words)

	Autotracking fume extraction exhaust hood - Patent 5036754
		An exhaust system for fume extraction from a work area such as the vicinity of a welding gun is provided, having an articulted exhaust duct with a fume hood mounted at the forward end thereof.
		The fume hood 12 is generally in the form of a truncated cone, having a wide mouth 13 and a narrow top 15.
		The fume hood 13 is, of course, in gas communication with the exhaust duct 14.
	www.freepatentsonline.com /5036754.html (3558 words)

	About Berkeley Hood
		Fume hoods have long been used to protect workers from breathing harmful gases and particles, and are ubiquitous in pharmaceutical and biotechnology facilities, industrial shops, medical testing labs, private and university research labs, and high school chemistry labs.
		Fume hoods are box-like structures, often mounted at tabletop level with a movable window-like front called a sash.
		Innovation is hampered by various barriers stemming from existing fume hood testing/rating procedures, entrenched industry practices, and ambiguous and often contradictory guidance on safe levels of airflow.
	ateam.lbl.gov /hightech/fumehood/About.html (474 words)

	The MSDS HyperGlossary: Fume Hood
		Air is drawn into the hood under and through the opened sash and is exhausted through openings in the rear and top of the cabinet to a remote point such as an exhaust stack on the roof of the building.
		Fume hoods are good at containing fires, explosions etc., but if the potential for an explosion exists, use an auxiliary blast shield as well.
		Fume hoods are a much more efficient and effective method of containing hazardous materials than a piece of personal protective equipment such as a respirator.
	www.ilpi.com /msds/ref/fumehood.html (711 words)

	Fume Hood - lab Safety - Department of Environmetal Health & Safety University of Louisville
		The rest of the guide discusses the different types of chemical hoods and their advantages and limitations, and the difference between chemical hoods and biosafety cabinets, which are sometimes mistaken for chemical hoods.
		It is therefore important when using the hood to position the sash at the height indicated by the arrow on the yellow hood certification label.
		The yellow hood certification label affixed on the left side of the hood indicates the most recently measured hood face velocity and the date by which the hood should be retested.
	www.louisville.edu /admin/dehs/lsfume.htm (3080 words)

	The Scientist : The Dos and Don'ts of Fume Hood Safety
		The most widely accepted test for fume hood performance is the ASHRAE 110 test, which uses a spectrometer to determine the parts per million (ppm) of freon in the user’s breathing zone at a specifled release rate six inches behind the hood sash.
		A hood that passes the ASHRAE test with a score of 80 fpm face velocities would probably not be able to handle the release of an average smoke bomb in the hood.
		Ethyl ether released in such a hood would have to be vaporized at the rate of 6 ½ ounces per minute to reach the lower threshold explosive limit (i.e., the required concentration to explode) for this hood.
	www.the-scientist.com /article/display/7780 (1224 words)

	Fume Hood Specifications :: Laboratory Design & Equipment :: Laboratory Safety :: EHRS
		The rear and top interior of the hood should be furnished with baffles to provide at least two (preferably three) slots, adjustable in width, to attain reasonably uniform face velocity under different conditions of hood use as related to heat sources, size, and configuration of equipment within the hood, and other factors.
		The fume hood shall be tested prior to leaving the factory and meet the ASHRAE 110-most current Tracer gas test protocol with a rating of 4 AM 0.05.
		Hoods shall be tested after installation and meet ASHRAE 110-most current Tracer gas test protocol with a rating of 4 AI 0.1 and the Flow Vizualization and Velocity Procedure tests.
	www.ehrs.upenn.edu /programs/labsafety/fume_hoods.html (706 words)

	University of Wisconsin-Milwaukee Department of University Safety and Assurances -- Fume Hoods: Procedures and Practices
		Fume hoods are the primary method of exposure control in the laboratory.
		Hoods should be evaluated by the user before each use to ensure adequate face velocities and the absence of excessive turbulence.
		Combination vertical/horizontal sash fume hoods shall have an alarm that gives a warning when the sash is vertically raised from the fully lowered position.
	www.uwm.edu /Dept/EHSRM/LAB/fume.html (1201 words)

	UW EH&S - Fume Hood Prudent Practices (Site not responding. Last check: )
		Fume hoods are analyzed and reported on annually to assess performance standards.
		Use of fumes lighter than air or when high loads of heated fumes are generated, it is best to exhaust with the upper baffles opened.
		Some fume hoods have baffles that are not adjustable; instead they are fixed in the most optimal setting for general hood usage.
	www.ehs.washington.edu /fsofumehoods/fume.shtm (572 words)

	Flow Safe Inc.- Fume Hood Alarms & Controls
		The Bi-Stable Vortex fume hood technology is the first major advancement in fume hood technology in 50 years and has succeeded in solving the problem of high energy consumption and poor containment found in conventional hoods.
		This fume hood is a critical factor in creating "green" laboratory environments.
		Government studies indicate that if only half of the existing fume hoods were replaced with high performance, low airflow fume hoods, our nation would save 235 trillion BTU's of energy per year.
	www.flowsafe.net (499 words)

	Chemical Fume Hood Certification
		Chemical fume hoods are intended to remove vapors, gases and dusts of toxic, flammable, corrosive or otherwise dangerous materials.
		If you have reason to believe that a fume hood in your lab is not functioning properly, please call (846-2550) or email jramsey@ehs.ufl.edu (on-campus laboratories) to set an appointment for a hood profile.
		For the hood to have the required airflow it is imperative that the lab staff follows sash heights documented on the profile sticker.
	www.ehs.ufl.edu /lab/fumehood.htm (1955 words)

	UC Davis - Office of Environmental Health&Safety
		The hood effectiveness is greatly affected by work practices at the face (front) of the hood and conditions within the laboratory.
		When fume hoods are shutdown due to system failure, maintenance or repairs, hazardous materials operations in the hood must stop, the hazardous materials must be capped or transferred to a functioning hood, and the sash closed.
		Hoods posted with a warning sign prohibiting use must not be used until the problem is corrected and approval is received.
	ehs.ucdavis.edu /sftynet/sn-35.cfm (1249 words)

	Fume Hood Validation Program
		Laboratory fume hoods are one of the most important components used to protect laboratory personnel from exposure to hazardous chemicals and agents used in the laboratory.
		Hoods that pass will be labeled in the upper left hand corner with the hood number, average face velocity, and date of test.
		The hood may also be labeled with green arrows indicating the sash height that should not be exceeded.
	offices.colgate.edu /chemmgt/fumehoodvalprog.htm (1845 words)

	Chemical Fume Hood Safety
		Fume hoods and other ventilation controls should provide enough ventilation to adequately remove the chemical hazard from the work area.
		To obtain a quick flush of the hood following a chemical spill in the hood, lower the sash to about an 8 inch open height, set the controller to 200 ft/min for a couple minutes, then return the controller to 100 ft/min for regular use.
		Hoods that do not contain manual flow controls will be adjusted to maintain a face velocity of around 100 ft/min when turned on with the sash raised to 18 inches.
	www.cst.cmich.edu /safety/chemical_fume_hood_safety.htm (756 words)

	Fume Hood: Advanced, Energy-Efficient Fume Hood Under Development
		Fume hoods are ubiquitous in industrial, medical, and university research facilities.
		"Fume hoods typically require large exhaust flows and are usually never turned off, so they use a tremendous amount of energy both in fan power and in heated and cooled room air," says engineer Bell.
		A typical fume hood, perhaps six feet wide and two to three feet high, circulates air through its sash at 100 feet per minute.
	www.lbl.gov /Science-Articles/Archive/fume-hood-advances.html (870 words)

	Fume Hood Safety
		Fume hoods accomplish this by exhausting air through the hood face to the outside of the building.
		A fume hood face velocity of 100 fpm is considered acceptable in standard practice.
		Many studies regarding fume hood safety have indicated that face velocity is not the best measure of a fume hood's ability to contain hazardous substances.
	ateam.lbl.gov /hightech/fumehood/students/su00/Fox/FHSafety.htm (1076 words)

	Fume Hood Info
		It is both inconvenient and dangerous to install a Fume Hood so that the operator is forced to work in the line of traffic movement.
		Studies have shown that hoods operated at face velocities of 150 FPNI and greater often perform poorer than if operated at a lower face velocity, due to disruptive air turbulence at the perimeter of the Hood opening and in the wake of objects placed inside the work area of the Hood.
		When using high concentrations of aerosols, solvents or other flammable vapors inside the fume hood, an exhaust blower with a non-sparking wheel and explosion-proof motor may have to be used.
	www.bmclab.com /hoodsafety.htm (1480 words)

	OHS - Laboratory Fume Hood/Ventilation Equipment Certification
		An average of 100 FPM is an ideal velocity for fume hoods in a laboratory.
		Depending on the size of the fume hood, between 9 and 18 measurements are taken to determine the average face velocity.
		When a fume hood's face velocity is satisfactory, a yellow certification sticker is placed on the left side of the fume hood.
	www.udel.edu /OHS/ventilation/fumehoodcert.html (358 words)

	Fume Hood Reduces Energy Use 50 Percent in Test
		The prototype high-performance fume hood installation at UCSF’s Scanning Electron Microscopy and Cardiovascular Structure Lab is the first in a working lab in California and one of two prototypes currently in testing in the U.S. "We are thrilled with the success of this field test," Sartor said.
		Generally, fumes are drawn out of a hood by fans through a port at the top of the hood.
		A typical fume hood, with a sash opening six feet wide and two to three feet high, circulates air through this sash at 100 feet per minute.
	www.lbl.gov /Science-Articles/Archive/fume-hood-elec-movie.html (801 words)

	LabCrafters -Air Sentry Fume Hood Manufacturers
		The Air Sentry™ fume hood's lower airflows result in quieter operation and are ideal for delicate research involving use of powders or precise measuring equipment inside the fume hood.
		The Lab Crafters Air Sentry™ fume hood is the most technologically advanced fume hood on the market and has been proven, time and again, to significantly out perform the competition in terms of both containment performance and guaranteed energy savings.
		The two main features of this patented hood are the mathematical formula used to determine the dimensions of the fume hood and the automatically adjusting baffle system.
	www.lab-crafters.com /fumehoods/sentryn.html (746 words)

	Fume Hood, Laboratory Fume Hood, Ductless Fume Hood, lab equipment
		Fume Hood, Laboratory Fume Hood, Ductless Fume Hood
		The PURAIR 5 unit is a compact bench mounted fume hood that can be used for small amounts of chemicals.
		The Fume Hoods offered here, along with over 750,000 other laboratory equipment we have available to you have been selected by Lab Depot as high value lab supplies.
	www.labdepotinc.com /Category_Details~id~409.aspx (196 words)

	Fume Hoods, Ductless Fume Hoods, Laminar Flow Hood - AirClean Systems
		Systems manufactures a complete range of ductless fume hoods and laminar flow hoods designed to protect the operator, the process, or both from toxic vapors, fumes, gases, and particles.
		Systems ductless fume hoods, workstations and enclosures are designed to protect the operator, process or both from toxic vapors, fumes, gases and particulate.
		Systems fume hoods, workstations and enclosures is a revolutionary gas phase bonded carbon filter.
	www.aircleansystems.com (266 words)

	Laboratory Fume Hoods,Fume Hood Manufacturers,Laboratory Fume Hood Manufacturers,India (Site not responding. Last check: )
		Laboratory Fume Hoods,Fume Hood Manufacturers,Laboratory Fume Hood Manufacturers,India
		T.D.S. Laboratory fume hoods are one of the most important components used to protect laboratory personnel from exposure to hazardous chemicals and agents used in the laboratory.
		However the suction velocity of the FUME HOOD will be around 100 cfm per square feet.
	www.toshibha.com /products/fumehood.html (331 words)

	Fume Hood
		Fume hoods are a type of local exhaust that removes the contaminant at the source of generation.
		The fume hood velocity should be checked at least annually to verify proper flow rate across the face.
		There should be a sticker on the side of the fume hood that indicates the maximum operating sash height with a date of the last inspection.
	www.uaf.edu /safety/Fume_Hood.htm (236 words)

	Fume Hoods
		Chemical fume hoods are important laboratory equipment, the first line of defense against exposure to hazardous chemicals.
		Prior to fume hood use, become familiar with the locations of the nearest exit, emergency shower, eye-wash station and fire extinguisher.
		Fume hoods are by no means a replacement for protective wear and good laboratory practices.
	www.columbia.edu /cu/ehrs/Fumehoods.html (560 words)

	Fume Hoods Fact Sheet
		The fume hood protects users from inhaling chemicals by constantly pulling air into the hood and exhausting it out of the building.
		Fume hoods also provide protection in the event of an explosion or fire.
		The capture ability of a fume hood may not be 100% at the front of the hood.
	www.ehs.berkeley.edu /pubs/factsheets/09fumehd.html (661 words)

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