DWS™ Downflow Workstations are high efficiency ductless fume hoods designed to protect the user and the environment from hazardous vapors generated on the work surface. Unrestricted front and side access facilitates applications requiring complex and intensive operator involvement, while downward airflow in the chamber protects the operator. The DWS™ Downflow Workstation product line is based on an innovative Multiplex™ Filtration Technology that creates a safe work environment over the widest range of applications in the industry.
Features

Filter I.D. Window: A strategically placed front cover window shows the installed filter part number and installation date for convenience and to encourage timely filter replacement.
Control Panel: Electronic controls and displays include switches for the blower, low airflow alarm and electronic hour counter.
Steel Support Frame: The chemical resistant epoxy coated steel frame adds mechanical strength. Optional all polypropylene construction is available if desired; see accessories.
Electrostatic Pre-Filter: The 99.5% effective electrostatic pre-filter can be changed from below the work surface while unit is operating, to prevent user exposure to chemical vapors and powders trapped in the filter.
Color: The cabinet is white with blue trim; optional side panels and front sash are clear. (Black color also available, see Options and Accessories.)
Airflow Alarm: A continuous air velocity monitoring system alerts the operator upon unacceptable values.
Manual Speed Controller: The operator may set the centrifugal fan motor speed as desired.
Stand: Optional mobile cart with locking casters.
Work Surface: Under the perforated stainless steel internal work surface is a polypropylene tray to retain any spillage.
Filter Door Key: Filter access keys prevent unauthorized removal or accidental exposure to dirty filters.
Integral Lighting: A vapor proof fluorescent lamp illuminates the interior of the workstation.

OTHER FEATURES

Side Panels and Front Sash: (Optional) When installed, optional side panels and optional front sash provide better containment of hazardous vapors. The Front Sash is easy to open and close.
270 Degree Visibility: Unrestricted user access to the front and sides of the workstation also admits ambient illumination and provides an unobstructed view of its contents.
Standards Compliant: Performance specifications and construction meet or exceed OSHA, ANSI and relevant international standards to assure operator safety.
Construction: All models are available in either metal or polypropylene construction. See selection chart for specifications and dimensions. Specify metal or polypropylene when ordering. Available in 110V, 60Hz or 220V, 50Hz models.

DUCTLESS TECHNOLOGY: The Eco-friendly Choice

Advanced carbon filtration technology offers a safe, high performance alternative to conventional ducted fume hood products for a broad range of applications.
Environmental Benefits. Air Science® ductless fume hoods isolate and trap chemical vapors to prevent ecological impact through release into the environment.
Versatile. Each filtration system is selected for its specific application. The Multiplex™ Filter broadens the range of applications. Carbon filters are available in more than 14 configurations for use with vapors or organic solvents, acids, mercury and formaldehyde. HEPA/ ULPA filters can add to biological safety.
Easy to Install. The ductless fume hood is self-contained and does not require venting to the outside. Many units are portable and may be moved from one location to the next with minimal downtime and without filter changes. Set-up, operation and filter maintenance are straightforward.
Energy Efficient. Because filtered air is returned to the room, no demands are required of the facility HVAC capacity for make-up air.
Cost Effective. Facility ductwork, HVAC and construction costs are eliminated.
Safe to Use. Workstation airflow and face velocity protect users from incidental exposures to fumes.
Self testing. Electronic airflow monitoring assures continuous safety. An optional electronic gas sensor monitors carbon filter performance.

Product Specifications
DWS™ Model

DWS24

DWS36

DWS48
Airflow CFM

145

290

435
Face Velocity FPM

80

80

80
Noise, dBA, 1 meter

< 52 < 52 < 52 Lighting Compact fluorescent lighting. Construction White epoxy coated steel frame and head unit. Clear side panels. Stainless steel spill tray. Blower ebmpapst™ centrifugal fan. Electrical 120V, 60Hz or 220V, 50Hz voltages available. Specify when ordering. Other voltage options available. Electrical Switches Main On/Off Monitoring Low airflow alarm, standard. Ordering Information Model Dimensions Weight (lbs/Kg) Metal Polypropylene Internal Height External Dimensions (W x D x H) Shipping (W x D x H) Net Ship DWS24 DWS24-PP 15.75" 400 mm 24" x 22.75" x 31.5" 610 x 580 x 800 mm 40" x 40" x 40" 1016 x 1016 x 1016 mm 120 / 55 160 / 73 DWS36 DWS36-PP 15.75" 400 mm 36" x 22.75" x 31.5" 915 x 580 x 800 mm 40" x 45" x 40" 1016 x 1143 x 1016 mm 131 / 60 227 / 103 DWS48 DWS48-PP 15.75" 400 mm 48" x 22.75" x 31.5" 1220 x 580 x 800 mm 40" x 55" x 40" 1016 x 1397 x 1016 mm 185 / 84 250 / 114