Ducted Fume Hoods vs Ductless Fume Hoods

Businesses use laboratories in the large number of techniques in recent times. And, with tight budgets, constrained sq. footage, altering enterprise dynamics and protection concerns involved, businesses at times battle On the subject of buying lab home furniture.

Just one vital conclusion comes when it’s time to buy a chemical fume hood on your new laboratory or all through a redesign.

And, let’s be sincere, the stakes might be substantial. Just look at this article about a tragic laboratory accident at UCLA to see the possible implications of Functioning in the fume hood.

Below we glance at your choices...a ducted fume hood or simply a ductless fume hood?

The Standard – Ducted Fume Hood
Ducted fume hoods have ventilated enclosures, work within the framework of your building infrastructure and pull contaminants out within your making in the HVAC procedure.

Ducted fume hoods have a foundation, work surface, hood, blower and ducting that carries the air beyond the building. The engineer of your heating, air flow and air-conditioning (HVAC) program wants to find out Should your area has ample air to offer the necessary volume of air flow to your hood.

The upkeep on the fume hood is carried out as Portion of the developing's maintenance, and is generally executed by All those in command of the mechanical programs.Normally, the upkeep or Environmental Health and fitness and Basic safety crew care for any issues.

Your HVAC engineer can do the job with all your crew to supply optimal air source and harmony, in order that every thing functions thoroughly in the fume hood.

Ducted fume hoods are deemed safest for personnel in laboratories, and its generally the simplest for employers to keep up. Numerous universities ONLY make it possible for ducted fume hoods within their facilities to keep up worker and university student basic safety.


Safer for lab workers
Can tackle various chemical substances
Easy to function and preserve
Very little to no contamination in lab
Down sides

Harder to set up
Stationary inside the lab
More challenging to move or relocate
Use additional Vitality

The choice – Ductless Fume Hoods
Ductless fume hoods function off a carbon filter process that recirculates filtered air into your creating. Ductless hoods will often be called re-circulating vary hoods. They filter the air then return the clean air back again into the workspace. They can be self-contained filtered laboratory enclosures. Their primary capabilities are mobility, they conserve Vitality, are uncomplicated to put in and more cost-effective since no ductwork is necessary.

The disadvantage is always that personnel are at a increased risk of chemical exposure, filter servicing is required, they are often noisy resulting from the internal blower and you can find confined applications for filter possibilities.

Ductless fume hoods are perfect for labs that need mobility, cope with light to moderate chemical loads and are searhing for a price-effective alternative click here from both equally an installation and operational viewpoint.


Less costly
Uncomplicated to setup
Mobile inside the lab
Quickly moved or relocated
Use less Electrical power

Handles Confined substances
Require to exchange filters
Not as productive at removing chemical fumes
Not for continuous use

How Do I Choose?
There are various thoughts that ought to be questioned to determine probably the most acceptable fume hood in your laboratory challenge - ducted or ductless.

Here are some:

Do you're employed with greater than 10 various chemical substances?
Will you be dealing with compact or large volumes of chemicals?
Does your lab have a higher volume of inexperienced folks working with chemical substances, like a university lab?
Does your constructing have an HVAC technique in addition to a staff to deal with it?
Is mobility essential for your Procedure?
Do you might have techs which will adequately retain a process, e.g. switching out filters?
Will the substances you will be working with sufficiently filter by way of carbon?
Answering these questions on how you work with chemicals inside your lab can help you determine the appropriate software for your requirements.

Laboratory security and workload ought to be the primary selecting components as part of your determination. Within a ductless fume hood, there ought to be no extreme heating, not more than ten chemical substances should be made use of for every application, small volumes of substances really should be employed (roughly five hundred mls or a lot less) and exposure time should be in just 2-3 several hours daily.

There are a range of filters which have diverse chemical trapping capacities, but Should your application doesn’t match readily available filters you’ll be necessary to move ahead using a ducted fume hood. Talk to your fume hood company about the assorted filters for chemical teams.

And finally, figure out how frequently you can be replacing your carbon filter, this could also give you a extra correct financial Charge. Remember that the filter everyday living is dependent upon the chemicals applied, evaporation charge, chemical quantity, duration of utilization and also the temperature with the chemicals.

It is crucial to make certain that you may have the correct fume hood for your personal lab application, as the safety of your respective work and also your employees is at stake.

It is usually most effective to consult with a specialist fume hood manufacturer, so that your lab would not go up in smoke!

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