We just received our unit. Where is my Operating Manual?

Typically these are taped to the unit. Call us at 1-800-977-2125 and we will send you one via email or US mail.

How long do the filters last?

The answer to this question depends on the application being performed and how much particulate is being generated. The total area of filter media in our solutions ranges from 150 to 600 square feet, with efficiencies ranging from 90% at 1.0 microns and 99.97% at 0.3 microns. This may help paint a picture of how much area can be utilized to capture particulate.
Due to the self-contained (non-ducted) nature of DualDraw downdraft equipment, if the application generates lots of dust, fumes, or smoke (for example, plasma cutting thick steel) the filters will need to be changed on a frequent basis to maintain efficiency. For lighter duty applications, such as buffing or soldering, we have seen our filters last up to a year or more.
To determine when a change is necessary, a user can read the pressure gauge located on the downdraft unit and during the buying process we can guide our customers based on our experience in this area. Ultimately, a change is determined when the suction on the table is not effectively capturing the particulate of concern.
Filter replacement is affordable and straightforward. We offer discount filter programs and make it easy to order replacements through our website. See DualDraw Filters for more information.

Aluminum – Titanium – Magnesium: do you have downdraft tables that will work for these substances?

Yes, we manufacture downdraft tables and downdraft paint booths to capture all types of dust, fumes, or smoke. Aluminum, titanium, and magnesium specifically are all explosive dusts and need to be specially handled.
We manufacture dry downdraft collectors for aluminum dust that are designed specifically for aluminum grinding only. We also sell wet downdraft tables that can be used for all three types of dust – aluminum, titanium, and magnesium. See DualDraw Wet Downdraft Tables for more information.

Do DualDraw downdraft tables work for capturing dust from deburring?

Yes, we have many customers that use our downdraft equipment to capture the dust created from a deburring application.
See DualDraw Downdraft Equipment for Dust Collection.

Do DualDraw downdraft tables work for capturing welding smoke?

Yes, we have many customers that use our downdraft equipment to capture the smoke created from welding. Our first solutions in 1995 were designed to capture welding smoke.
See DualDraw Downdraft Equipment for Welding for more information.

Do DualDraw downdraft tables work for fume control?

Yes, our activated carbon filter pack is designed to help customers reduce volatile fumes and noxious odors.
We match customer MSDS reports to our filter solution to ensure that our downdraft tables effectively capture the concerned fume.
See DualDraw Downdraft Equipment for Fume Control for more information.

What are your standard delivery terms?

All of our equipment is built-to-order, tested, and inspected prior to leaving our plant. Typically this happens in four weeks or less however our standard terms are four to five weeks depending on plant capacity.
We also offer expedited pricing which prioritizes your order and decreases ship time by two to two and a half weeks – please inquire.

The unit will not turn on, what’s the problem?

Check your power cord. Make sure your unit is plugged into an operable outlet.
If your unit has an on/off switch, ensure this is in the “on” position.
If your unit is a Mailroom Inspection Workstation or AirCHX unit, ensure that the HEPA filter is sealed correctly and the safety button on the filter seal is depressed.
Compare the unit voltage with the source voltage. If there is a mismatch, you may have an issue with your motor.

The suction on my unit is not strong enough, how do I address this?

Check your filter gauge. The gauge located on your unit should be used as a proxy to tell the user when to change the filter based on the manufacturer’s recommended settings as typically indicated on the gauge and/or in the operator’s manual. If the gauge needle is above the recommended reading, it is time to check your filters and at a minimum change your pre-filter.
Check your filters. If suction is poor but the gauge does not indicate that the filter needs to be changed, check your filters. If the filters appear dirty, the gauge setting may be incorrect. This may be caused by changes in the atmospheric pressure. To determine the setting that should be used to indicate when the filters should be changed, first establish a gauge reading with clean filters. Then, block the filters 75% with cardboard and take another gauge reading. This method acts as a good proxy to determining a gauge setting for which you should change the filters.
Ensure that your motor is wired correctly. If you motor is wired backwards, the fan will spin in the opposite direction. It will only provide very limited suction if this is the case.
You may need to upgrade to a stronger motor or decrease the area of suction depending on the type of hazard that needs to be contained. DualDraw configures each unit based on industrial hygiene requirements as they relate to the process being performed on the table surface. If this process changes over time, the unit may need to be upgraded.

My unit arrived damaged, what do I do?

While very rare, sometimes during shipment our units will become damaged. If your unit arrives damaged or not to your liking, please call us immediately and we will work with you to get you a new unit or fix your existing unit with replacement parts. We take photographs of every unit that leaves our plant and will be able settle with the shipping company later.

I need to order more filters, how do I place an order?

Give our Filter Sales Person a call at 1-800-977-2125 for a quote. We offer discounts for bulk ordering! You can also order directly from our website at DualDraw Filters.

The filters in my unit are getting dirty very quickly, what do I do?

A significant benefit of self-contained filter systems is that you do not need to cut a hole in your ceiling and constantly replace the ambient air in a room (causing HVAC costs to increase dramatically). This also allows for mobility within an operation. However, a reality of a self-contained downdraft unit is it needs to have its filters changed– some more frequently than others.
Depending on the process you are performing on the unit, frequent filter change may be normal. For example, processes such as plasma cutting a surface greater than ¼” thick will create an abundance of smoke that may “flash” your filters. Or, you may be generating a moderate amount of dust but run your operations 24 hours a day. In both of these “high-use” scenarios, you will be required to change your filters often, perhaps even daily. This is not typical, but some processes require a daily filter change. If your process is considered “high-use” we are happy to work out a discounted bulk filter program with you or guide you to one of our self-cleaning units.
In rare circumstances, there are certain design changes that we may be able to employ to help your filters last longer. Call us if you are interested in discussing further: 1-800-977-2125.

My unit is for fume control – how come I still smell fumes?

Our carbon filters do an excellent job on most noxious fumes and vapors however a user may still smell some fumes and be somewhat concerned. Typically, the amount of fumes that escape un-captured and back into the environment is far below the TLV for the particular fume. However, a professional measurement of the exhaust fumes will quickly determine if there is an on-going issue. If so, we can discuss either adding more carbon to the filter pack or changing to a carbon/potassium permanganate mixture which works well on different kinds of fumes.

Can I use my unit for painting?

Typically, we do not sell our equipment as heavy-duty paint booths. However, we have sold to a number of graphic designers and artists who will use our equipment for light spray painting, hand painting, drawing, gluing, and other adhesive work.

How flammable are the filters in my unit?

All DualDraw filters are Class II ASHRAE fire retardant. Class I ASHRAE fire resistant filters are available if requested.

Why does my light not work?

Most lights that come on DualDraw units are wired separately from the main power so the light should have its own switch mounted to the side of the unit.
Additionally, each light typically has a switch on the fixture itself and this may need to be turned to the “on” position.