The purpose of the fume hood is to contain contaminants and prevent their escape into the laboratory. 10. Mystaire®. With a 400 CFM range hood, install 4” duct. Because filtered air is returned to the room,Think of those as the energy hog of the lab. Certified to ASHRAE 110, EN 14175-3, AFNOR NF X 15-203, BS 7989, BS 7258. Besides noble gases, carbon filters don’t always retain carbon dioxide, carbon monoxide, and nitrous oxides, which are often easily managed by lab air turnover. Step 3: Drilling Holes. Typical Fume Hood Design. 00 - $3,415. New chemical fume hoods must be equipped with air flow monitoring devices which will alert the user if there is a problem with air flow. Install a remote switch away from the fan unit to allow quiet activation. There is a significant loss of warmth up via the ducts in traditional fume hoods. Ductless fume hoods must have prominently posted signage informing operators and maintenance personnel on the allowable chemicals used in the hood, type and limitations of filters in place, filter change schedule, and a notice that the hood recirculates air in the room. 00 $ 137. Height (Metric) Sash Opening. 3 microns. . Use of a "ductless fume hood" is strongly discouraged. Low static rectangular exhaust duct. MSFULLSEA Laminar Flow Hood Mycology Vertical Laminar Flow Hood H-E-P-A Filter Air Flow Clean Bench Workstation for Phone LCD Repair Tissue Culture Seedlings Only 1 H. Help keep your lab employees safe with a ductless fume hood and fume hood filters and other accessories from Grainger. It is. * The case is made of 8mmPP plate, with good finish and corrosion resistance. Offering laboratory safety with full-features at a great value, Esco Ascent™ Opti Ductless Fume Cabinet is among the finest in the industry, designed and. Web Fume Hood Filters From Grainger Can Help Protect Lab Personnel From Dangerous Airborne Toxins. The Labconco Paramount™ Ductless Enclosure requires no outside ducting. But this model is intended for the bench top. The mobile fume extractor / fume exhauster is an air purification system which can provide the partial high pure environment. The liner is compatible with general. The HEPA filter in the exhaust system of a biosafety cabinet will effectively trap all known infectious agents and. AirClean Systems manufactures ductless fume hoods, chemical workstations, and enclosure cabinets that protect the operator from exposure to toxic vapors, gases, air fumes, and particulate. The configurable filtering system above the enclosure can be adapted. H. Indemnity4 • 4 yr. Quality and safety cannot be assured in aftermarket or DIY replacement carbon filters. Filters are available for adsorbing or treating acid gases, solvents, ammonia, formaldehyde and radioisotopes. Typically used in locations where outside ventilation cannot suffice, a ductless fume hood is a necessity to eliminate high percentages of harmful contaminants to protect users. As a vital piece of laboratory equipment, thorough product specifications help you decide which make and model will work best for your. $3,567. Because of the toxic fumes, good ventilatio…. Be sure to use the workbench to support the plate. The advent of ductless fume hoods (also known as filtered fume hoods) around 50 years ago was a significant milestone but, since then, advances in filtration technology, safety and flexibility have enabled them to adapt fully to the changing demands and safety standards of the modern laboratory. No external ducting, building work or changes to heating and ventilation systems are necessary. Currently, two types. A fume hood is a ventilated enclosure used to control exposure to hazardous or odorous chemicals. Air Science ® Laminar Flow Hoods are a series of high efficiency products designed to protect equipment and other contents of the work zone from particulates, for applications sensitive to such contamination. Jenis-Jenis Fume Hood Terdapat 2 jenis fume hood yaitu Ducted fume hood dan Ductless fume hood. The pre-filter starts the process of. • A low airflow alarm warns of insufficient face velocity. 0024 Toll Free/800. As Savage explains, “air is simply pulled and recirculated back to the lab, unlike a ducted hood where it’s pulled from outside, tempered, introduced to the lab, moved through the hood, and then sent back outside. Unlike ducted fume hoods, ductless hoods are self-contained and work well for laboratories where. If there are opposing fume hoods, the distance from the aperture should be more than 3 m. Finally, dangerous vapours are rejected in the atmosphere without danger to the environment. Sometimes referred to as “recirculating range hoods,” this type of hood filters the air and then returns it back into a workspace. It is not permitted to use ductless fume hoods or to circulate any laboratory fume hood exhaust air, as they do not provide sufficient protection and cannot handle extreme heating of chemicals. 7 inches deep to accommodate any need. 2K views 6 years ago #EscoLifesciencesGroup. com. Ductless fume. The look and feel of a traditional fume hood, without the associated installation or energy costs; More Info Get Quote. A large variety of ducted fume hoods exist. For bench top, counter tops or cabinetry & casework. Place a particulate-trapping HEPA filter after a carbon filter to help provide exhaust air suitable for cleanroom. Available in four configurations and 6 standard sizes, in metal or polypropylene construction, totaling 12 standard models. Thomas Numbers 1167M01-M04: Units do not have a blower and require a…. No installation costs since no ductwork is required. Cole-Parmer Ductless Demonstration Hood Filters. Without the additional ducting system requirement,. Ductless fume hoods, Paramount®. Find effective ductless chemical hoods for efficient laboratory ventilation. A chemical fume hood is a ventilated enclosure used to trap and exhaust vapors, gases, and nanoparticles. Used. Proper maintenance of ductless fume hoods starts with a solid filter replacement schedule. 0656 F/800. Make sure the damper is facing the right direction. AirMax, with wet fume scrubber, is a total solution for minimizing personnel, ductwork and environmental exposure to caustic acid gases. Window: A strategically placed front cover window shows the installed filter part number and installation date for convenience. Ducted hoods typically require a significant volume of airflow to work properly. com. Protects the operator or class from toxic fumes and (with added HEPA/ULPA filter) particle hazards. Best Bang for the Buck. com. Jul 11, 2021. NF X 15-211 Ductless fume hoods - Classe I. FLOW Series Laminar Flow Hood, 24" / 600mm Nominal Width, 115V 60Hz. $137. Ductless fume hoods, laminar flow hoods and biological safety cabinets are all designed to meet the needs of highly specific, extremely diverse situations. 32 oz Spray Bottle DOT Info: UN1760, Corrosive…. With memory function in case of power-failure. . ” 36 48 22–50 watt1 The single EC blower motor assures lower cost of ownership in one ofMore power = better results. When it comes to ductwork, it’s a numbers game. Obstructions such as pillars or columns in the laboratory should not be within 30 cm of the sides of the fume hood. View Items to Compare. Turn off the power to the range hood, then unscrew the wire nuts and disconnect the wires. Ducted fume hood adalah jenis fume hood yang banyak digunakan di laboratorium, fume hood jenis ini bisa langsung dipasang di ruangan laboratorium dengan melubangi dinding laboratorium untuk pemasangan ducting. Esco ductless fume hoods also offer energy savings, convenience, and mobility. DWS Downflow Workstations are ductless fume hoods designed to protect the user and the environment from hazardous vapors generated on the work surface. 24” (61 cm) deep clear interior. If there are opposing walls or obstructions, the. CONTROL The basic control panel panel is standard and includes an On/Off 60H 60V 60H-XL Fume Box-AP60V The optional source capture hose converts the Fume Box to a fume extraction unit with a 6" diameter. This compact-sized and simplified ductless fume hood is complete with internal lighting, worktop, and microprocessor control system. Reply. Temperature and humidity sensors, can detect indoor temperature and humidity. If you have a range hood that just recirculates air back into the kitchen, you need to use another exhaust fan — for example, from a nearby bathroom — or open windows. 5 m/s or 80-100 fpm. Purair Basic Ductless Fume Hoods. The hood is constructed of chemical-resistant epoxy-coated steel for added mechanical strength. Ductless Fume Hoods (portable fume hood, ductless fume cabinet) provide protection to both laboratory personnel and the environment from toxic fumes and are quickly becoming a viable alternative to conventional fume hoods. Use for locations where outside ventilation cannot be achieved. 8'' slope front ergonomics design, fatigue-free working posture. Protects the operator from fume and (with added HEPA/ULPA filter) particle hazards. She uses a polyester resin, which works a lot like fiberglass resin (mix the resin with a hardener/catalyst, pour), but unfortunately it smells about as bad too. Clean Aire II Fume Hoods are a Class DH1 ductless hood workstation. Set-up, operation and filter maintenance are straightforward. 17 in. Labconco Protector Echo and Airo Filtered Fume Hoods are simple to install because they require no ductwork. 7. Ductless fume hoods have no place in the reactions side of refining. With a reliable, durable sensor element, monitor provides simple field calibration. So after being inspired by the countless DIY fume hoods, like this one, he decided to try his hand at it. $ 6,900. 00. Clean Aire II Fume Hoods are a Class DH1 ductless hood workstation. Erlab ductless filtering chemical fume hoods provide the world’s most powerful filtration, guaranteeing safety and performance. Low airflow alarm. $ 3,648. Protector Echo Filtered Fume Hoods. 2. Esco’s research scientists and engineers, working in con-Purair® Basic ductless fume hoods are designed to provide high level performance features at an affordable price. The Labconco Protector Premier Fume Hood has been engineered to provideDuctless Fume Hoods. Gas ranges offer immediate and adjustable heating for cooking needs at a low cost. $ 3,384. Labconco™ Protector™ Acid Digestion Hoods: 4ft. Activated Carbon Filtration for fumes, odors, non-hazardous chemical vapors. The hood is resistant to acid, alkali, and is anti-corrosive. Work Practice Controls. Filter I. Turn off the power to the range hood, then unscrew the wire nuts and disconnect the wires. Ideal for general chemistry applications. Pros and Cons. LabGuard is an expert leading fume hood manufacturer in India. FLOW-36-A. Filters of this type are generally inexpensive, and last for approximately six months depending on. Jenis-Jenis Fume Hood Terdapat 2 jenis fume hood yaitu Ducted fume hood dan Ductless fume hood. By capturing toxic molecules and particles evaporated in the hood, these filters allow for a safer. Under-cabinet range hoods are a huge asset. 7 inches deep, or as small as 3 feet wide x 31. The first step to determine the right ductless cabinet for your application is to. This is Labconco’s most flexible fume hood. Cole-Parmer® FHD-200 Series Standard Ductless Fume Hoods. 2. A ductless fume hood can be placed on a bench and connected to an electrical supply. Product Type. Figure 2: Intensive energy use for ducted fume hoods (US DOE, 2014) ii. Cole-Parmer® FHD-200 Series Standard Ductless Fume Hoods. Cole-Parmer® FHD-400 Advanced Ductless Fume Hoods with Filte…. Modest chemical volumes should be used, around 500 mls or less per chemical. Esco Ascent™ Max-C Series (ADC-C) has a secondary carbon exhaust filter that offers a higher filtration efficiency against toxic chemical fumes. The ductless fume hood is self-contained and does not require venting to the outside. We suggest you get. volatile organic compounds, smelly chemicals). A fume hood is. The system has a MAX 375 CFM rating and a quiet 5. Use HVAC foil tape to hold everything together and make it airtight. The design of this hood is beautiful and functional, and the buttonless display. Ductless fume hoods are designed to protect personnel by filtering out dangerous fumes and vapors so that air can be safely recycled back into the work space in an energy-efficient way. 10% off your first purchase + Free ShippingHow to Make a Fume Hood Part 1 - Plan and Supplies Science Marshall 21. Start with a point 20 cm from the bottom, followed by one 54cm to the left of the top. 5m, with PP drip-cup provision: Accessories. Cut two support beams to this width. These can be gases, vapours, aerosols or particulates (dust). Continuous airflow across the work surface draws contamination away from the user, recycling clean air back into your laboratory. 00. Ductless Fume Hoods and Enclosures . Web hepa filters are designed to trap particulate and can be used in ductless fume hoods or laminar flow products. Country of Origin: Made in India. Have a second person support the weight of the range hood while you use a screwdriver to loosen the. Fume hoods are lined with various chemical resistant materials,. Because the air that is pulled into the hood is not filtered, fume hoods only offer protection to its users and no protection to the. Ducted hoods typically require a significant volume of airflow to work properly. Review WorkSafeBC regulations regarding the use of ductless fume hoods 2. Laboratory fume hoods manufactured by Kewaunee Scientific Corporation, Mott Manufacturing, Baker, Labconco or Lab Crafters are preferred. Labconco Ductless Fume Hood Paramount Style Labconco Paramount Ductless Fume Hood used, Labconco Ductless Fume Hood Paramount. Ductless fume hoods by Air Science ® protect your personnel and the environment from toxic or volatile chemicals so that you can concentrate on what matters most: your work. Introduction Step 1: Precutting/Sizing The Materials. She uses a polyester resin, which works a lot like fiberglass resin (mix the. Features. Comfee CVU30W2AST Range Hood 30 Inch Ducted Ductless Vent Hood Durable Stainless Steel Kitchen Hood for Under Cabinet with 2 Reusable. More options with sizes and configurations. Products include cabinets suitable for biosafety applications and related documentation. 51 products. These employ multiple pre-filters, HEPA filters, activated carbon filtration, and a strong fan. Benchtop, Light weight and completely clear, polycarbonate & PVC fume hoods, ESD control, safety ventilates vapors, fumes and dusts from your work area. Explore Options. Labconco™ Paramount™ Ductless Enclosure: 3ft. Many units are portable and may be moved with minimal downtime and without filter changes. Adanya fume hood mampu mengontrol paparan inhalasi dari bahan kimia atau zat yang berbahaya. Our product line is categorized by a combination of product application, function, Air Science brand and typical market use. 52004. LED task lights and clear acrylic side and ear panels. No extreme heating should be carried out in the hood, i. For additional information, please contact Sentry Air Systems, Inc. Downward airflow in the chamber protects the operator. Ductless Fume Hood. A fume hood is a ventilated enclosure in which gases, vapors and fumes are contained. Labconco offers dished and flat solid epoxy and flat. This gives decent airflow to remove the dangerous fumes from the work area. Our ductless fume hood selection provides quality, energy, efficiency, savings, safety, and convenience for our customers. It is the result of Labconco’s more than 60 years of experience in manufacturing fume hoods, and users like you suggested many of its features to us. 799. Proper maintenance of fume hoods gives you longer protection from hazardous fumes. Activated Carbon Filtration for fumes, odors, non-hazardous chemical vapors. 5" / 750mm Nominal Width, FSA Filter Saturation Alarm and AUTOCAL Airflow Display, Requires Minimum One ASTM-XXX Main Filter P10-XT-A-ADVP Purair®ADVANCED Ductless Fume Hood, 29. Improved filter clamping eliminates by-pass leakage. Known for its plug-and-play feature and mobility, Ductless Fume Hood guarantees a hassle-free installation and no lab work interruption. Weller WSA350. This compact-sized and simplified ductless fume hood is complete with internal lighting, worktop, and microprocessor control system. Ducted vs Ductless Range Hoods. They’re appropriate when there’s a potential for being exposed to high volumes of. Hauslane Chef Series WM-639 Wall Mount Range. 800. Understanding which hood is right for your laboratory takes experience and an intricate knowledge of the science behind laboratory filtration. Sentry Air Systems’ OSHA compliant Portable Spray Booths are built with stringent quality control measures and superior craftsmanship. Submit Request. 3 goes on to say that where ventilation is not adequate (less than ten air exchanges), "a local exhaust hood should be installed for the containment of glutaraldehyde vapor. Sort By. e. Our ductless filtering fume hood does not pollute the outside. ago You should be fine with any sort of airflow. •Choose ducting that’s the same size as or slightly larger than the vent opening. acid digestion applications. At the heart of the Purair Advanced ductless fume hood product line is the innovative Air Science® Multiplex™. The fume hood is an important safety staple in chemistry classrooms and research labs. Total daily contaminant exposure per employee should not. Once you’ve got the materials precut and sized, the next step is to cut the edges. Conduct a literature review of ductless fume hoods in engineering and industrial hygiene journalsDucted Fume Hood. Indoor/Outdoor. 68 - $480. 6 m/s. Request for Quote. They are a conventional fume extraction unit designed so that airborne contaminants are contained in the enclosure prevented from entering the room or laboratory by means of a protective air barrier between the user and the materials placed. All air that flows through these stand alone fume hoods will get recycled back into the laboratory space. Biosafety cabinets have high-efficiency particulate air (HEPA) filters while chemical fume hoods do not. Captair Smart Ductless Fume Hood by Erlab. 7 in. This hood comes standard as large as 16 feet wide x 43. 46” Wide AirHawk Ductless Fume Hood Optimize your workspace with the technologically advanced features of the AirHawk. MSDS data sheet for specific details of each chemical used. Downsides. • An expensive ducting and external blower system that is often difficult to maintain is not required. Esco Ascent™ Opti (SPD) ductless fume hood offers excellent containment and ergonomic features at a great value. Attach the supports together, creating a box frame. For ducted fume hoods, ensure that theA hood with missing side panels or cracked sashes will not provide adequate exposure control. 00. Build a hood with an appropriately sized blower and add a scrubber to remove emissions in need of scrubbing, like NOx, or the Sulfur. 120 6th Street Fort Myers, FL 33907 T 239-489-0024 Toll Free 800-306-0656 F 800-306-0677 5 USER OPERATION MANUAL: Purair Basic Series I . True bag-in/bag-out allows for safe filter replacement and HEPA filter disposal system. Unrestricted front and side access permits applications requiring complex user involvement. 9. Ductless Fume Hoods. It is completely molded of fire retardant fiberglass. Myth #3: “Explosion proof hoods are designed to protect the user in the event of an explosion”. SEE IT. These type of fume hoods filter out chemical fumes and recycle air directly back to the laboratory. e. Includes hood, fluorescent illuminator, blower module, two. We have a wide range of chemical fume hoods for our labs, be it an R&D lab, QC lab, educational lab or a third-party testing lab; you are all covered with LabGuard fume hoods. Paramount Ductless Enclosures are self-contained work stations, also known as ductless fume hoods, that use carbon filters to rid the laboratory of annoying or unsafe concentrations of organic solvents, formaldehyde, acid gases, ammonia, or radioisotopes. The Ductless Fume Hood - MID offers all the basic funcionalities, in addition to an air velocity display and alarm. The ductless fume hoods from METHOD provide the user with a secured workspace for the repetitive manipulations of small chemicals quantities. These devices work by using a fan to draw air into a chamber, through one or more filters, and back into the laboratory. DUCTLESS FUME HOOD FEATURES & BENEFITS • DFH are available in 3 standard sizes. Is a fume hood the same. Product dimensions: 8. Selain itu, fungsi fume hood adalah untuk mencegah pelepasan zat berbahaya ke dalam ruangan. Protecting People and Processes. Draw a. When deciding if you need a. Fume hoods are built with a safety glass sash that provides a physical barrier, however, it is still glass. Unlike traditional fume hoods, installation costs are very low and no ductwork is required. 48″ Fume Hood Vertical Sash. 5 in. ₹ 1,80,000/ Unit Get Latest Price. Insert the interior damper into the back of the range hood. 9 cm. Length: 750, 900, 1,200, 1,500, 1,800 mm. After passing through the pre-filter, the air continues onto the main filter. 4K subscribers Subscribe 23K views 10 years ago This is the first part in a series of. Chemcap hoods are ductless with recirculatory filtration, they incorporate efficient ‘Chemcap’ carbon filters for fume removal and HEPA filters for particulates. . • Energy Efficient. The self-contained assembly maximizes filter. Over time, filters become saturated with the chemicals they’re designed to intercept. The distance between the side of the fume hood and a doorway should be at least 3’ feet. 00 $ 489. The operating cost is significantly less for ductless units. Because filtered air is returned to the room, no Ductless fume hood, sometimes called carbon-filtered enclosure or filtered fume hood, are self-contained, filtered laboratory enclosure that remove hazardous fumes, vapors and particles from the laboratory. 99% at 0. All LabGuard fume hoods are type-tested for ASHRAE 110:2016 and EN 14175:2003 performance standards and. The most common type of fume hood, bench top units are installed on top of lower base units and most typical cabinets (base cabinets). Ductless Fume Hoods- Portable. Pros. . Paramount Ductless Enclosures (also known as ductless fume hoods) use carbon filters to rid the work area of hazardous fumes and vapors. Description. e. Depending on the chemicals you process and the lab’s air ventilation system limitations, ordering. $ 10,728. Airflow costs an estimated $8 USD per cubic foot per minute (CFM) on average, with a range from $5 to $13 USD depending on the climate of the lab’s location. 5 cm) round duct transition. Cut a window in your last panel. Fume hoods are designed to provide personnel protection from toxic or volatile chemicals by continuously shifting airflow away from the user and to the work area. A unique filter clamping design eliminates bypass leakage outside the cabinet. The carbon filter is sized to fit the specified product model number and configured to optimize airflow across 100% of the filter surface area. This attractive, portable and easy to maintain system is. Fume scrubbing is a different matter. Fume hoods are often the most used piece of equipment in research laboratories and frequently shared by lab personnel. Here I show how I built my home-made chemical fume hood for use in gold recovery from electronic scrap. A ducted fume hood that requires 500 CFM could cost as much as $4,000 USD per year to operate. Filter blockage alarm. 4-0. Functionality and durability in mind, our fume hoods are designed for the harshest laboratory environment today. Most ducted fume hoods are low and have a vertical sliding sash. Aeromech make Fume Exhaust Hood. This fume hood box design is perfect for adding more filters. Constant Monitoring of Temperature and Humidity Mystaire® ductless fume hoods are self-contained, filtered enclosures that remove hazardous fumes, vapors and particles from virtually any laboratory application. A ductless fume hood can save a lot of money when it comes to new lab buildings. Portable Fume Hood Portable fume hoods, also known as ductless fume hoods, are movable enclosures with a sash that filters hazardous vapors, particles, and fumes from the lab by use of carbon and/or HEPA filters which can be chemical specific. An exhaust fan situated on the top of the laboratory building pulls air and airborne contaminants through connected ductwork and exhausts them to the atmosphere. Between 600-900 CFM, install 6” duct. Here are the best practices in maintaining. We manufacture a complete series of high efficiency ductless fume cupboards, ductless workstations, laboratory filtration products, and custom enclosures. Select Options. Photo: homedepot. Erlab are experts in air filtration, protecting the safety of lab personnel for over 50+ years. View Items to Compare. 66. A ductless fume hood is a contained working space that uses powerful negative airflow to pull harmful fumes, vapors or particulate away from the operator’s. Our ductless fume hoods are safe and convenient to. Once the air is drawn in, it moves through a filter called the pre-filter. Best Splurge. Esco Ascent™ Max-B Series (ADC-B) is the standard ductless fume hood model. Purchaser of a DFH can be a Project Manager, an Area Manager, a PI, a department administrator, or any. These exhaust hoods are fitted with fans that. At the forefront of efforts to keep pace. The final tip concerns the duct size. 33 CAD / Each. OSHA 29 CFR Part 1910. These enclosures serve as barriers against exposure that could be detrimental to tests or health. Preparing the Fume Hood for WorkDucted Fume Hoods. Feature chemical-resistant fiberglass, composite panel liners, Eco-Foil™ air foil and aerodynamic Clean-Sweep™ airflow openings. A floor mount fume hood is typically a large stationary equipment enclosed on five. Ductless fume hoods are stand-alone enclosures that use carbon and/or HEPA filters to remove fumes, vapors and particulates from air drawn through the device and then discharge the filtered air back into the laboratory. Range Hood Size (Width) 30 in. Unlike traditional fume hoods, they require no ducting so they can be moved from lab to. TopAir Ductless Fume Hoods are made of high-quality non-corrosive polypropylene with excellent chemical resistance that regular metal hoods cannot compete with. 2. Fume hoods remove the fumes as air flows into the hood and then out via the laboratory exhaust system. Ductless fume hood means a non-ducted fume hood utilized for the safe removal of low hazard chemical or other nuisance vapors and/or fumes, and is often referred to as a “green” fume hood, and referred to in this. Name and Email are required. $489. Since they have a lifespan, they will need to be installed, replaced, and purchased. Unlike conventional fume hoods, ductless fume. 6 m/s at proper sash height level. Height (English) Sash Opening. This is accomplished by drawing contaminates within the hood’s work area away from the user, so that inhalation and contact are minimized. Combined with a powerful airflow, advanced electronics, and a compact enclosure, the AirHawk provides optimal respiratory protection for a wide variety of commercial, laboratory, and medical applications. The harmful fumes or vapors. Harm may occur to the operator,. The H14 Hepa filter which is the most efficient will stop 99,97% of the particles whith a diameter equal or bigger than 0,3 µm. e. Description. Many units are portable and may be moved from one location to the next with minimal down-time and without filter changes. The Echo is the world's most advanced chemical filtration system coupled with the versatility of the Labconco Protector Fume Hood platform that laboratories trust. Available in ducted or recirculating formats, the front sash may be moveable and is constructed from clear safety glass for easy. Find carbon filters, HEPA filters, biosafety. Made out of panelized fiberglass, the design allows for wider and deeper standard sizes. Also designed to protect an RNA or DNA sample from contamination the Captair Bio range uses air from. fume hoods are advised to be placed side by side rather than facing each other. The distance between the sash of the fume hood and a doorway should be at least 4’ 6”. Ductless Technology: The Eco-Friendly Choice. The Echo is the world's most advanced chemical filtration system coupled with the versatility of the Labconco Protector Fume Hood platform that laboratories trust. $517. Attach the damper with screws.