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All you Need to Know About Fume Hood Construction and Installation


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GdLabs are the leading laboratory fume hood manufacturers in India, specializes in manufacturing safe & efficient quality fume hoods. Get in touch now!

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All you Need to Know About Fume Hood Construction and Installation

  1. 1. © GD Vanguard. All Rights Reserved. All you Need to Know About Fume Hood Construction and Installation
  2. 2. © GD Vanguard. All Rights Reserved. Laboratory fume hoods are a type of ventilation that acts as a protective barrier. It prevents you from toxic inhalation exposures, chemical spills and laboratory accidents. To make your fume hood function smoothly, you need to maintain pressure in the interior of the hood to prevent contamination from escaping through the hood opening. Excessive face velocities can lead to turbulence and affect hood performance. While constructing or installing a fume hood, you need to keep track of some of the following guidelines to improve performance and productivity: ➔ The average air velocity at the fume hood face should range from 80-100 linear per minute. While some experiments might need higher velocities of about 125 linear feet per minute. Make sure the velocities don’t exceed 150 linear feet per minute. ➔ Your exhaust fan should be large enough to filter air out from your building or room. ➔ The minimum number of air changes for a chemistry lab should be 6. Keep track of the ‘air changes per hour’ on a case-by-case basis. ➔ Changes in air supply is a symbol of poor lab ventilation design. The type of chemicals used, heat load and type of fume hood can affect your ventilation. ➔ You might have difficulty in balancing the air supply and exhaust of supply hoods adequately. If the air supply is intemperate, then the employees might feel discomfort. During such conditions, the supply vent should be either shut or blocked off completely. Also, frequent movements can hinder the stream of air supply and degrade the fume hood performance.
  3. 3. © GD Vanguard. All Rights Reserved. ➔ The interior fume hood surfaces should be made of corrosion- resistant, non-combustible and non-porous materials like stainless steel or any other unique composite materials. ➔ Say no to plastic or fibreglass proof hoods. ➔ Opt for a recessed type fume hood to prevent work surface spills. Such spills can be effectively contained by the retaining lip. ➔ Invest in baffles with horizontal slots that can be placed at the rear and top interior of the fume hood floor. Choose two or more slots with an adjustable width to acquire the required face velocities inside the fume hood. ➔ All the newly installed or renovated fume hoods should be compatible enough to pass the capture efficiency test. Make sure you test each fume hood after proper installation. ➔ In chemical labs, exhaust fans should be connected to the emergency power to overcome sudden power cut. ➔ During such placements, you should have an equivalent volume of supply air, or it can be difficult to open emergency doors during emergencies. ➔ We hope you know that the noise from fans and ductworks shouldn’t exceed more than 65 dBA inside the laboratory. Adhere to the above guidelines to improve your fume hood performance significantly. Want to replace your old fume hood with a new one? GD is at your service!
  4. 4. © GD Vanguard. All Rights Reserved. GD is the first lab furniture manufacturer in the world to be SEFA certified across 3 categories – SEFA 1 for fume hoods, SEFA 8M for metal lab furniture and SEFA 10 for flexible and modular lab furniture. Contact us now!