FAQs

Are ductless fume hoods safe?

Yes. Ductless fume hoods are as safe as ducted fume hoods when matched to the appropriate application. Ductless hoods are a good choice for laboratories to avoid costly HVAC upgrades and still be able to manage a variety of filtration requirements. You can read more about the differences between ducted and ductless fume hoods here.

How versatile are ductless fume hoods?

As your needs and applications change over time, ductless fume hoods can be adapted to fit new air filtration needs. Filters in ductless fume hoods are interchangeable and can be customized to protect against a wide variety of chemical families. Learn more about choosing a hood for your application here.

Do ductless fume hoods maintain consistent face velocity?

Ductless fume hoods have high capacity air handling systems to deliver 100 FPM face velocity. This velocity is sufficient to contain chemical fumes and particulates. Advanced monitoring technology also ensures that this face velocity is maintained consistently, if velocity decrease an audible alarm sounds to warn technicians. Learn more about monitoring and alarm systems here.

Will a ductless fume hood work in my laboratory?

Yes, if paired with the application correctly. There are certain considerations to take into account, such as what chemical families you are filtering, how much of each chemical, and whether the environment is caustic or corrosive. Ductless fume hoods are designed for easy installation. Mobile models can be moved around the laboratory as needed. Read about the benefits of using ductless fume hoods here.

How do I monitor my carbon filters?

Each ductless fume hood is equipped with a filter saturation alarm that alerts you when the filter needs to be changed, ensuring complete safety for your technicians and equipment. Filter management programs help busy laboratories manage the lifespan of the various ductless fume hood filters that are in use in the laboratory. Learn more here.

Are there safety filters in ductless fume hoods?

Yes. Ductless fume hoods can include optional safety filter to offer increased protection across the range of chemicals used in an application. A pre-filter is standard and is coupled with either a customized carbon filter or HEPA / ULPA filtration. Learn more about Multiplex filtration and its benefits here.

Are ductless fume hoods as technologically advanced as other types of hoods?

Yes, and sometimes more so. Ductless fume hoods have a variety of built-in alarms to monitor airflow and filter saturation. Manual speed controllers manage fan speed and a variety of control options can be operated independently or tied into a larger, remote controlled monitoring systems. Learn more about the different levels of automation by visiting this page.

What types of filtration are available in ductless fume hoods?

Carbon filters that protect against a variety of chemical families are available, as are HEPA and ULPA filters. Filtration guides are available to help choose the correct filter based on the chemicals in use in your hood. Additionally, a full application review can be performed to ensure that technicians are fully protected by the filters chosen.

How quiet are ductless fume hoods?

Most fume hoods have a noise level of less than 55 dba at one meter. Some units are even quieter, depending on the fan used and the required airflow inside the hood.

Are ductless fume hoods economical?

Yes. Ductless fume hoods not only save money on extensive HVAC and laboratory utility upgrades for installation, but also cut costs over time by operating more efficiently than other laboratory hoods. Efficient fan motors, low maintenance designs, and complete monitoring systems mean that ductless fume hoods can cut utility costs and provide a low cost solution for filtration in a variety of laboratories.

What industries currently use ductless fume hoods?

Most laboratories are good candidates for ductless fume hoods. Ductless hoods are installed around the world in a variety of industrial and laboratory applications. Ductless fume hoods can be used in the life sciences, pharmaceutical manufacturing, forensics and evidence collection, industrial research, education and environmental sciences. Learn more about different applications here.

Can I use ductless fume hoods and ducted fume hoods in the same facility?

Yes. In most laboratories, a combination of ducted fume hoods and ductless hoods is an effective way to ensure complete filtration for all chemical applications. Ductless fume hoods can be incorporated to help expand the capabilities of an existing lab, while avoiding additional construction costs and ongoing HVAC and utility expenses. Ductless hoods can also be on casters to allow the hood to be moved around within a facility, providing ultimate flexibility of placement.

Can ductless fume hoods be tied into my existing control network?

Yes. Many ductless hoods can have PLC-style control systems installed, which can then tie into your existing facility control and monitoring systems. This permits seamless control system integration and easy operation.

Do ductless fume hoods run continuously?

No, they do not have to run continuously, but can if that is what your application requires. If continuous operation is not required, power switch controls turn off the fan and other monitoring systems. This can help cut utility costs and save on equipment wear and tear.

How do ductless fume hoods affect future facilities planning?

Ductless fume hoods are invaluable in future facilities planning. If you only have a short term research contract, are a start-up operation, or are located in a building with no existing HVAC system or where one would be difficult to install, ductless fume hoods can allow you to get to work immediately. Once installed, you can have complete confidence that your investment will be 100% portable and re-usable.

Can ductless fume hoods increase productivity?

Yes, ductless fume hoods can increase productivity and safety. Locating hoods directly at the point of use, such as directly at the technician’s work station, eliminates lost time while technicians walk around the laboratory to find an open vented fume hood.