Fume Hood Duct Less

Duct less fume hoods provide protection to both laboratory personnel and the environment from toxic fumes. Ductless fume hoods are considered as independent systems that do not require connection to the extraction systems. Ducted laboratory fume hood from Weiber protect the operator from toxins via a revolutionary gas phase bonded-carbon filter.  These polypropylene microprocessor based-hoods filter out chemical fumes and recycle air directly back to the laboratory, providing energy savings, personnel and environmental protection, without ducted system offering independent working.  It is either ceiling suspended or mounted on wall. Weiber specializes in both standard and customized fume hoods.

Construction Details
Fume hood duct less are developed and designed to be used as semi conductor ventilated enclosures so as to protect the user from harmful and toxic fumes and vapors and to eliminate the possibility of accidental fire which may lead to emission of inflammable gases during the course of experiments. Hence, the materials of fume hoods are carefully chosen between industrial grades fire resistant commercial wooden boards covered with laminated sheets and lined completely with epoxy coating/FRP lining or corrosion resistant steel sheets having epoxy coating from inside, duly painted with attractive stove enamel/drying spray paint.
 
The work table is made of heavy gauge construction material fortified with acid proof glazed tiles/stainless steel grade ss-304 grade. The work bench is provided with a small made of stainless steel ss-304 grade. All fume hoods are provided with sliding sash made of special grade shatter proof glass duly framed in wooden/ aluminum frame with sliding motion and counter weight balanced mechanism.

Volume of Exhaust
It is generally known that fume hoods are capable of maintaining a constant exhaust volume.

Testing Procedures of Contaminants
Ductless Fume hoods are specifically to decrease the loss of static pressure at a given baffle opening position. According to the standard procedures the average loss of static pressure at any given four points at ninety degree and 3 duct dia from the fume hood, that will not exceed 75 feet per minute at 0.25 inch, with full slash opening and face velocity of 100 feet per minute.

Noise and Sound Levels
Our stainless steel ducts less fume hoods are designed with lower noise levels and the performance of these fume hoods are comparatively better than the industry standards of 60db, and approximately 15cm distance from the sash.

Illumination Levels at Work Space
Our versatile fume hoods make sure that a maximum of 800 lux light is available on the work table through diffuser fluorescent light arrangement.  

Exhaust Assembly
These modular and automatic ductless fume hoods are incorporated with an extremely durable and strong exhaust system that generally persists a range of 500-1250 CM. These exhaust assembly comprises of balanced centrifugal impellers that are combined with a heavy duty three phase motor of Crompton greaves.

Exhaust Ducting
These advanced and mobile ductless fume hoods are also integrated with a FRP ducting of required dimension as per the requirements of the user.

Features

• Portable
• Activated charcoal filters
• Toxic fumes detector
• Chemical resistant
• Durable
• Reliable
• NABL & NSF certified
• CE marked

Technical Matrix: Fume Hood