Ducted Fume Hoods vs Ductless Fume Hoods

Businesses use laboratories inside a multitude of strategies today. And, with limited budgets, limited square footage, transforming company dynamics and basic safety criteria involved, enterprises occasionally battle when it comes to purchasing lab home furniture.

Just one vital decision will come when it’s time to purchase a chemical fume hood on your new laboratory or all through a redesign.

And, let’s be sincere, the stakes might be substantial. Just consider this information a few tragic laboratory incident at UCLA to begin to see the opportunity consequences of Operating 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, operate within the framework of one's setting up infrastructure and pull contaminants out of your setting up through the HVAC method.

Ducted fume hoods Possess a base, perform surface area, hood, blower and ducting that carries the air outside of the creating. The engineer from the heating, air flow and air-conditioning (HVAC) process desires to ascertain If the home has more than enough air to offer the required volume of ventilation to the hood.

The maintenance of the fume hood is executed as Section of the constructing's servicing, and is usually carried out by These in control of the mechanical methods.Usually, the Maintenance or Environmental Health and Basic safety staff deal with any concerns.

Your HVAC engineer can function with all your crew to supply optimum air source and harmony, in order that every little thing functions properly 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 allow for ducted fume hoods within their facilities to take care of worker and student basic safety.


Safer for lab employees
Can deal with several different chemical compounds
Straightforward to operate and keep
Small to no contamination in lab
Down sides

More expensive
Tougher to install
Stationary from the lab
More difficult to move or relocate
Use much more Electrical power

The Alternative – Ductless Fume Hoods
Ductless fume hoods work off a carbon filter technique that recirculates filtered air into your developing. Ductless hoods will often be called re-circulating range hoods. They filter the air and afterwards return the thoroughly clean air back again in to the workspace. They are really self-contained filtered laboratory enclosures. Their Major features are mobility, they preserve Electricity, are simple to setup and less expensive mainly because no ductwork is required.

The downside is usually that workers are in a greater chance of chemical publicity, filter upkeep is necessary, they can be noisy on account of The inner blower and you'll find confined applications for filter possibilities.

Ductless fume hoods are perfect for labs that demand mobility, cope with light to moderate chemical masses and are seeking a cost-successful possibility from each an set up and operational standpoint.


Less expensive
Simple to set up
Cell within the lab
Simply moved or relocated
Use fewer Power

Handles Minimal substances
Require to exchange filters
Not as productive at removing chemical fumes
Not for constant use

How Do I Choose?
There are numerous inquiries that ought to be questioned to ascertain 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?
Do you think you're dealing with smaller or significant volumes of substances?
Does your lab Have got a high volume of inexperienced individuals working with chemical substances, such as a university lab?
Does your making have an HVAC procedure and a team to manage it?
Is mobility necessary for your Procedure?
Do you have got techs that can thoroughly maintain a procedure, e.g. switching out filters?
Will the substances that you are applying sufficiently filter by way of carbon?
Answering these questions on how you work with chemicals inside your lab can help you figure out the appropriate software for your requirements.

Laboratory security and workload ought to be check here the primary deciding components as part of your determination. In the ductless fume hood, there needs to be no Intense heating, not more than ten chemical substances ought to be utilized for every application, little volumes of chemicals need to be applied (about 500 mls or less) and publicity time must be inside two-three hours per day.

There are a selection of filters that have different chemical trapping capacities, but In the event your software doesn’t match accessible filters you’ll be needed to go forward that has a ducted fume hood. Discuss with your fume hood provider about the varied filters for chemical groups.

Last of all, establish how often you will end up replacing your carbon filter, this will also offer you a a lot more exact fiscal Price. Remember the fact that the filter daily life depends upon the substances employed, evaporation level, chemical volume, period of utilization as well as temperature in the substances.

It is necessary to make sure that you might have the right fume hood in your lab application, since the protection of the do the job along with your workforce is at stake.

It is usually finest to consult with a specialist fume hood company, so that your lab won't go up in smoke!

Leave a Reply

Your email address will not be published. Required fields are marked *