Ductless Fume Hood

General Application Ductless Fume Hoods

Purair® Basic ductless fume hoods are designed to protect the user and the environment from hazardous vapors generated on the work surface. These high-efficiency fume hoods are expertly designed to meet specific applications and certified for quality construction. Available in 24", 36", and 48" widths with two depth options.

Key Features

• High efficiency ebm-papst EC blower
• Energy saving LED lighting
• Protects the operator from fume and (with added HEPA/ULPA filter) particle hazards
• Improved filter clamping eliminates bypass leakage
• Low airflow alarm
• 22–50 watt energy consumption based on cabinet size
• Meets or exceeds OSHA, ANSI, and other international standards
• 360 degree visibility with clear back and side panels
• Face velocity of 100 fpm in compliance with US and international safety and performance standards

Applications

• Compounding
• Balance Enclosures, Microscopes, and Robotic Equipment
• Forensics
• Histology
• Educational
• Microscopy
• Mobile and Classroom Demonstrations
• Pharmaceutical
• Powder Fingerprinting
• Powder Weighing
• Sample Prep Work
• Soldering
• Solvent Cleaning and Welding
• Veterinary
• Dental

Ductless Technology Benefits

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. Carbon filters are available in more than 14 configurations for use with vapors of organic solvents, acids, mercury, and formaldehyde. HEPA/ULPA filters can be added for 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 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: Cabinet airflow and face velocity protect users from incidental exposures to fumes.

Self-Testing: Electronic airflow monitoring assures continuous safety. An electronic gas sensor monitors carbon filter performance (select models).

Design Features

• Filter I.D. Window: A convenient, strategically placed front cover window shows the installed filter part number and installation date to encourage timely filter replacement
• Control Panel: Electronic controls and displays include switches for the blower and low airflow alarm
• Airflow Alarm: Low airflow alarm continuously monitors filter loading and alerts user when service is needed
• Steel Support Frame: Chemical resistant epoxy coated steel frame adds mechanical strength
• Hinged Front Sash: When closed, the cabinet sash protects the contents from inadvertent external contact and better isolates the air within
• Pass Through Ports: Electrical cords and cables are safely routed into the cabinet through ports on the back
• Electrostatic Pre-Filter: Accessible from inside the chamber and 91% effective down to 1-3 microns
• Filter Door Key: Filter access keys prevent unauthorized removal or accidental exposure to dirty filters
• Dynamic Filtration Chamber: Prevents any possible leakage of contaminated air by pressurizing the fan plenum (positive air) and depressuring the filter compartment (negative air)
• Internal Manual Speed Controller: Authorized personnel may set the EC blower speed as desired

Filtration Technology

At the heart of the Purair product line is innovative filtration technology. The Multiplex Filtration System consists of a pre-filter, main activated carbon filter, and optional HEPA/ULPA filter. The system permits a customized combination of filter media and configuration for chemical and physical adsorption specific to each application need.

The Air Science carbon filtration technique is based on enhanced, activated carbon particle formulations from specially selected, naturally occurring raw material that is superior to wood or other organic sources. The carbon is treated to attain the proper porosity and aggregate surface area and to react with several ranges of aerosolized chemicals moved through the filter by an air handling blower.

Multiplex Filtration System Components

• Electrostatic Pre-Filter (P): Protects the main filters from aerosols, mists, dust, and particulates
• Activated Carbon Main Filter (C): A single or stacked filter configuration
• HEPA/ULPA Filter, Optional (H): Both HEPA and ULPA filters use micro-glass fiber media designed to capture fine particles and biologicals. Both filters can capture particles smaller than the micron size for which they are tested. HEPA and ULPA filter efficiencies are 99.995% at 0.3 microns and 99.9995% at 0.12 microns respectively

Airflow Operation

Contaminated air is pulled through the Multiplex Filtration System. Activated carbon adsorbs chemical vapors and optional HEPA/ULPA filters capture particulates. Clean air is returned to the room. The main filters are easy to replace with no tools required. The filter clamps tightly against the filter gasket to prevent filter bypass and maintain filter integrity. The pre-filter may be replaced while unit is in operation.

Filter Configuration Options

The Multiplex feature permits one or more filtration options to be combined to meet a wider range of multiple-use applications. The Purair Basic can be equipped with a single activated carbon main filter or with a stacked configuration which combines two main filters, each activated to adsorb one or more specific vapors or family of vapors. For safety against particulates, an optional HEPA or ULPA filter can also be added. When used with a HEPA/ULPA filter, the ductless fume hood may be applied as a Class I Biological Safety Cabinet.

Available Filter Formulas

Model Specifications

Dimensions and Weight

Product Specifications

Note: Energy consumption disclosure is based on internal testing with primary filters during normal operation. Power consumption published is nominal and dependent on cabinet size. Noise measured 12" (30 cm) from the cabinet front and 15" (38 cm) above the work