Laboratory fume hoods new and used available for sale. All new installations or relocation of fume hoods must be commissioned by ehs prior to use. A fume hood face velocity of 100 fpm is considered acceptable in standard practice. Containing vapors, dusts, gases, and fumes generated within the hood, and removing them as air flows into the hood and then out via the laboratory exhaust system. Yet they are as much a part of the successful operation of the system as the fume hood itself. We offer stationary, portable, benchtop, and downdraft stations suitable for many applications, including welding and soldering stations, metal grinding, solvent mixing, and even painting. Please observe following safety considerations for the safe use of fume hood. A guide to fume hood codes and standards laboratory design. Most fume hoods for industrial purposes are ducted.
Do not use the hood if the flow rate monitor is alarming or the monitor readings differ significantly 20% from the ehs inspection sticker. A fume hood is a type of local ventilation device that is designed to limit exposure to hazardous. The laboratory chemical fume hood is the most common local exhaust ventilation system used in laboratories and is the primary method used to control inhalation exposures to hazardous substances. Standard operating procedure laboratory chemical fume hoods. Even so, the average fume hood does have several limitations. Fume hoods must have the air flow checked and be certified. Safe use of chemical fume hoods always work with the sash at the proper operating level as indicated by the arrows, usually no more than 1218 inches open. Safety glasses goggles, lab coats, and appropriate chemical gloves must be worn when working in, on, or around the fume hood. After maintenance work is performed new motor, repairs, modifications, relocation, a new fume hood being installed, etc. View the proper use of a fume hood video for a demonstration of how air currents and drafts can affect fume hood operation. Guidance on the use of fume hoods at tufts university fume hoods.
Safe use of chemical fume hoods environmental health and safety. Laboratory fume hoods a laboratory fume hood is a type of ventilation system that primarily functions to provide personnel protection against toxic fumes, vapors and dust. The fume hood must be operated with the sash no higher than the red arrow. In summary, follow these practices for safe hood use. When using a fume hood, there should be arrows located on the sash to indicate at what height the window should be raised. Fume hoods do not prevent spills and splashes, nor is the use of a hood a substitute for ppe. Use a fume hood when handling more than 500 ml of any liquid or gas with a tlv or pel between 5 and 50 ppm or powders between 0.
Use your fume hood, or other engineering controls, rather than the benchtop when there is a possibility of overexposure to air contaminants generated by a laboratory activity. Whats the difference between a fume hood and a biosafety. The fume hood is often the primary control device for protecting laboratory workers when working with flammable andor toxic chemicals. Chemicals that have high acute toxicity, are carcinogens, caror are reproductive toxins must be. Make sure that the exhaust blower is operating and air is entering the hood, prior to starting an experiment. Detailed instructions for use of the fume hood can be found in the lab safety manual. In certain situations face velocity of up to 125 fpm or as low as 75 fpm may be acceptable to meet required capture velocities of the fume hood. Fume hoods play an essential role in any laboratory, keeping technicians safe from toxic chemicals by providing a ventilation system. Safety glasses goggles, lab coats, and appropriate chemical gloves must be worn when. The dos and donts of fume hood safety the scientist magazine. Confirm the fume hood has been certified within the last 12 months. Example of a fume hood that has been set up incorrectly. Fume hoods are a primary method of exposure control in the laboratory.
Quick facts laboratorysafety chemicalfumehoods continuedfrompage1 occupationalsafety andhealthadministration. The fume hood is only one part of the lab ventilation system. The dos and donts of fume hood safety chances are excellent that if you ask laboratory workers to describe the ventilation system for their laboratories, they will not include themselves as part of the system. Certain chemicals used in large quantities such as perchloric acid, hydrochloric acid, and hydrofluoric acid. Fume hoods are essential for the containment of dangerous fumes and for the protection of occupants in the lab. A fume hood is not designed to contain high velocity releases of particulate contaminants unless the sash is fully closed. Learn just how much switching to ductless fume hoods could save you over the life of your equipment. Fume hoods fume extractors for laboratory use cole. Fume hood use varies widely depending on the type of procedures being performed in the space, the safety needs of the users, the protection needs of the experiments and specimens in the hood, the physical size of the experiments and the type of fumes to be contained. It is advisable to use a laboratory hood when working with all hazardous substances. Typically, general use fume hoods are set at 115 fpm.
When multiple chemicals are used the filter can reach saturation without anyone realizing it. The protector xl is labconcos most flexible fume hood. Jan 23, 2019 fume hoods play an important role in laboratories. Fume hood is only one of many terms for such containment devices. Chemical fume hoods reliably help protect you from chemical hazards when properly used, but they do have limitations. A properly operating and correctly used fume hood can reduce or eliminate exposure to volatile liquids, dusts, and mists. Ductless fume hoods provide a host of benefits over ducted hoods. It is important to know how to use your laboratory fume hood effectively in order to ensure maximum safety. Made out of panelized fiberglass, the design allows for wider and deeper standard sizes. Monitoringalarms many older labs are equipped with fume hoods that do not have air flow monitoring devices.
The primary function of a laboratory fume hood is to exhaust any type of substance that may cause harm, such as fumes, aerosol, gasses, vapors and dust. Certain chemicals used in large quantities such as perchloric acid, hydrochloric acid, and hydrofluoric acid should not be used in a chemical fume hood that is not approved for their use. Guidelines for the safe use of laboratory fume hoods. A fume hood is a ventilated enclosure that usually vents separately. But if you dont use the hood properly, you wont get the full safety benefits of this important piece of equipment and. If you, the hood user, are following good fume hood etiquette, you are taking care not only of your own safety and wellbeing, but that of your coworkers as well. Bypass chemical fume hoods are the most common type, operating at a constant air volume. We have compact, benchtop, and fullsized ducted fume hoods available for you to provide a safe working environment. The following work practices are always required when using chemical fume hoods. Health and lab safety guidelines require stringent handling of fumes and appropriate. If the fume hood has an airflow monitor, check the monitors status to ensure proper functioning. The protector echo is labconcos newest fume hood model. Apr 09, 2020 a fume hood is a piece of laboratory equipment that is used to protect scientists from the possible negative effects of an experiment.
Ducted fume hoods are ventilated to the outside providing the most rigorous user protection, particularly for chemically dangerous fumes. Fume hoods also offer other features and protections that are useful in a laboratory setting. A fume hood is a ventilated, enclosed work space intended to capture, contain, and exhaust harmful or dangerous fumes, vapors, and particulate matter. Beginners guide to fume hoods and safety cabinets bitesize bio. Choose from our selection of replaceable fume hood filters. Do not put your head in the hood, beyond the sash opening.
Safe use procedures properly functioning fume hoods help achieve personnel safety with respect to the hazards of chemical vapors and other harmful airborne substances. Fume hoods, new and used laboratory fume hoods at labx. The dos and donts of fume hood safety chances are excellent that if you ask laboratory workers to describe the ventilation system for their laboratories, they will not include themselves as. This is particularly important for those situations you use solvents and. How to select the correct fume hood for your applications. This is particularly important for those situations you use solvents and acids that can produce a volatile condition. Fume hood capture velocity is the speed at which fumes must be moving at a specific distance in front of the hood opening in order for the fumes to move to the hood and exhaust out of the room. Using a malfunctioning fume hood can be of great danger to the. Using a fumehood correctly perform all work involving hazardous or volatile materials in a fume hood. Auxiliaryair, reduced air volume and high performance fume hoods all fall under the bypass chemical fume hood umbrella.
The hood should not be operated unless it is verified that it is working correctly. Chemicals that have high acute toxicity, are carcinogens, caror are reproductive toxins must be handled in a laboratory fume hood except where there is only a very low risk of. Health and lab safety guidelines require stringent handling of fumes and appropriate technology to ensure proper air quality is maintained. Fume hoods that do not vent solvents outside of the building rely on filters inside the. When used properly, fume hoods offer a significant degree of protection for the user. Check that the fumehood is operating correctly before you start work. General purpose fume hoods labconco protector airo filtered fume hoods the protector airo filtered fume hood has compact design that combines erlabs neutrodine filter with fullyfeatured. Polycarbonate can be installed on most fume hood types, as long as the liner material is compatible with hydrofluoric acid. All chemicals should be handled in a laboratory hood whenever possible. The dos and donts of fume hood safety the scientist. Chemical fume hoods radiological and environmental. A fume hood is a type of local ventilation device that is designed to limit exposure to hazardous or toxic fumes, vapors or dusts. Why shouldnt i use a stand alone or ductless fume hood that doesnt vent to the outside.
To request that a new or relocated fume hood be commissioned, contact ehs. If your fume hood has not been certified within the last year, or if you have any questions regarding fume hoods, call ehs at 734 6471143. Check the baffles to make sure they are not obstructed. Before beginning work in a chemical fume hood do the following. They filter the air to prevent the inhalation of toxic. A fume hood uses highefficiency hepa and carbonactivated filters. In certain situations face velocity of up to 125 fpm or as low as 75 fpm may be acceptable to meet required capture. In addition, a laboratory hood or other suitable containment device must be used for all work with particularly hazardous substances. Please contact vehs 3222057 if you have questions regarding proper use of your fume hood or if you would like to have your fume hood tested. Keeping equipment and chemicals in the fume hood unnecessarily may cause airflow blockage. Oct 03, 2008 how to use your laboratory fume hood properly.
Use a chemical fume hood anytime your work involves. General work practices for laboratory hoods vanderbilt. Proper use of the fumehood sash can also shield the worker from an uncontrolled reaction. Supremescience in this video, i explain how to properly use a. In the event of lab move out and some servicesrepairs, lab personnel and researchers are responsible for decontamination of their fume hoods. Read chemical fume hoods overview to learn about how fume hoods protect you. Safe use of chemical fume hoods environmental health and. Fume hoods are inspected and tested annually to assess performance standards but it is up to you to use a fumehood safely. All fume hoods and other capture devices must be installed in consultation with facilities and ehs.
High performance hoods operating on a variable air volume vav system are the most efficient. A chemical fume hood is the main piece of laboratory equipment that protects laboratory staff working with hazardous chemicals. The fume hood is operating correctly when the magnehelic gauge indicates the pressure level at the time of certification or when the tsi gauge reads 100 fpm or greater. Any fume hood system should have an alarm, which will notify you immediately in the event of a malfunction. Fume hood capture velocity is the speed at which fumes must be moving at a specific distance in front of the hood opening in order for the fumes to move to the.
A fume hood is a piece of laboratory equipment that is used to protect scientists from the possible negative effects of an experiment. A ductless fume hood is designed to be used whenonly one chemical is used so that the filtration and maintenance schedule can be calculated based on that specific use. Its an energy saver for the lab, but it also means theres a smaller range of experimentation you can use it for, compared to conventional fume hoods. Fume hoods are inspected and tested annually to assess performance. Class iii biosafety cabinets are gastight enclosures, with both intake air and exhaust air passing through hepa filtration. The most important function is protecting lab technicians from chemical fumes, gases and vapors. We have compact, benchtop, and fullsized ducted fume hoods. Fume hoods fume extractors for laboratory use coleparmer. A fume hood is a ventilated, enclosed work space intended to capture, contain, and exhaust harmful or dangerous fumes, vapors, and particulate matter generated by procedures. Containers are stored too close within 6 inches of the face of the hood.
This is primarily done by keeping the air inside the fume hood away from the people doing the experiment. Fume hoods get rid of vapors from any reactions or reagents lab workers may be using. Fume hood use varies widely depending on the type of procedures being performed in the space, the safety needs of the users, the protection needs of the experiments and specimens in the hood, the. A fume hoods main job is to exhaust hazardous vapors and fumes out of the area. Fume hoods office of environmental health and safety. This is primarily done by keeping the air inside the fume.
If the monitor is alarming, do not mute or use the fume hood. This hood comes standard as large as 16 feet wide x 43. Jun 08, 2018 chemical fume hoods, when used properly, are one of the most reliable engineering controls in the laboratory. To check the air flow a strip of paper, tissue, or ribbon can be. Fume hoods are designed to keep laboratory professionals safe while working with hazardous materials. But if you dont use the hood properly, you wont get the full safety benefits of this important piece of equipment and you could be exposed to the harmful fumes youre dealing with. Before beginning work, test your hood to ensure there is sufficient air flow. Gases or vapors escaping from pressurized systems may move at sufficient velocity to escape from the fume hood. Chemical fume hoods, when used properly, are one of the most reliable engineering controls in the laboratory. When properly used, fume hoods protect staff from inhaling. Visit to learn more about our selection of used laboratory fume hoods products for sale. Using a malfunctioning fume hood can be of great danger to the worker. It was of use to thieves by its fume and sheen, being a stone born, as it were, to aid theft, and even opening bars and locks. This ensures that no other air currents in the laboratory redirect the fumes to other parts of the laboratory.
734 1412 235 109 1273 1252 107 461 318 1109 33 13 801 1400 1017 794 1349 906 792 1232 960 853 264 279 646 486 718 160 1488 159 186 790 1039 841 1266 1110 1143 952