How are Ductless Fume Hoods classified?

How Are Ductless Fume Hoods Classified

You’ve heard about Fume hoods, but Ductless Fume Hoods are not much talked about. They’re an indispensable tool in any laboratory that works with chemical reagents. They’re known as plug & play fume hoods for a reason, and that’s because of the flexibility and adaptability that they offer.

Here, in this infographic, we’re discussing how the Scientific Equipment and Furniture Association (SEFA 9-2010) classifies ductless fume hoods & what sets them apart from each other.

If you’re looking to install ductless fume hoods in your laboratory, get in touch with us at Kewaunee International & we’ll help you pick out the best-in-class hoods in the market. You can view our current collection here.

Types	Characterisation
Type I	Most common ductless fume hood & is mainly for chemical hazards Used for experiments (clinical or educational) – those that use strong chemical reagents like staining, etc. Filter – Activated carbon (or) application-specific filter Not to use for dangerous chemical hazards – no detection mechanism
Type II	Also known as ductless fume cupboard Used for chemicals that are approved by manufacturer – Has a chemical detection mechanism – can identify chemical permeates Works with the HEPA filters
Type III	Type II ductless fume hood with a backup filter installed They’re best for chemical reagents that are not only hazardous to personnel but also environment Backup filters work with detection mechanism They remain stable for long periods despite constant detection & filtration

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