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Air filtration for the protection
of laboratory personnel
CaptairFlex Ductless Fume Hood/Ductless Enclosure

Ductless Fume Hoods
Total filtration of toxic gases, fumes, odors, and powders

New! Discover the Reverso sash in ‘Features & Accessories’

CaptairFlex XLS483 Ductless Fume Hood


Total filtration of toxic gases, fumes, odors and powders

You can count on the CaptairFlex ductless fume hood to keep you safe during your chemical handlings.
It is safe, easy to install, and provides the added benefit of low running costs. Add a phenolic resin work surface for high chemical and moisture resistance.
The containment and filtration effectiveness of the CaptairFlex make this protective equipment a reliable, economical, flexible and environmentally-friendly solution for your lab.
Only Erlab offers a ductless enclosure that
guarantees safety by:
  • Adhering to the highest safety standard in the world for ductless fume hoods - AFNOR NFX 15-211: 2009 as recognized by ANSI Z9.5-2012. This standard guarantees that the emissions concentration at the filter exhaust will always be lower than 1% of the Threshold Limit Value (TLV)
  • Providing a published chemical listing with the retention capacity for our filters  
  • Evaluation and approval of the chemical handlings performed in the hood  
  • A Certificate of Validation verifying the chemical usage, filter type, and filter lifetime.
Over 100,000 Erlab ductless fume hoods are in use worldwide without failure, click to see why.

application worksheet

request a quote
Typical Applications :
  • Animal Perfusion
  • Dissolution
  • Distillation
  • Drying
  • Evaporation
  • Extraction
  • Filtration
  • Food Analysis
  • Food Safety
  • Microscopy
  • Mixture
  • TLC
Erlab ductless enclosures provide total filtration of toxic gases, fumes, odors, and powders
  • Meets the containment and filtration standards of AFNOR NF X 15-211:2009 filtration safety standard as recognized by ANSI Z 9.5-2012
  • Your safety is guaranteed because we adhere to the strict process of evaluating the chemicals that will be used in the hood before approving the application. This assures applicability and provides a true filter life cycle, guaranteeing that the emissions concentration at the filter exhaust will always be lower than 1% of the TLV during normal operation.
  • Automatic filter breakthrough alarm
  • Class 1 product with the addition of a second layer of filters
Performance and Flexibility
  • With Erlab's Flex Technology, you can configure the filtration that best suits our application -  liquid, powder, or liquid & powder applications
  • Select the filter that best suits your application
  • Our BE+ filter offers a high retention capacity of solvents, acids, and bases

Investment and energy savings
  • No ducting to the building ventilation system is required
  • Eliminates the energy consumption linked to the air renewal (air supply/extraction, filtration, dehumidification, air conditioning)
  • Very low energy consumption ranging from 70W to 261W

Ergonomic desgin
  • New front sash is now available! Front panel pivoting on horizontal rotation axis. See the technical datasheet.

Erlab's amazing filtration made easy
  • No ductwork necessary, your unit is up and running in minutes
  • Completely mobile and easy to relocate within your lab or to a new building

Energy efficient
  • No direct emission of pollutants into the atmosphere
  • We stand by our products with a lifetime warranty
Ductless Enclosure Model
Energy consumption
 Dimensions (inches)
(W x D x H)
Datasheet (PDF)  

CaptairFlex S321 CaptairFlex S321
(only available in the US)

consommation energetique - 70 W
Ext: 31 1/2 x 22 x 39 3/4
min 47’’ maxi.
Int: 30 1/8 x 19 x 26 1/2
Only available in the US
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CaptairFlex_hotte_a_filtration M321
CaptairFlex M321
(& Midcap version)

consommation energetique - 70 W
Ext: 800 x 630 x 1160/1345
Int: 764 x 543 x 866

Ext: 31 1/2’’x 24 2/3’’x 45 3/4’’min.-53’ max.
Int: 30 1/8’’x 21 1/2’’x 34’’
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CaptairFlex_hotte_a_filtration M391
CaptairFlex M391

consommation energetique - 70 W
Ext: 1000 x 630 x 1160/1345
Int: 965 x 543 x 866

Ext: 39 3/8’’x 24 3/4’’x 45 3/4’’ min 53’’ maxi.
Int: 38’’x 21 1/2’’x 34’’

For USA :

 go to

CaptairFlex_hotte_a_filtration M481
CaptairFlex M481

consommation energetique - 70 W

Ext: 1275 x 630 x 1160/1345
Int: 1240 x 543 x 866

Ext: 50 1/4’’x 24 3/4’’x 45 3/4’’ min 53’’ maxi.
Int: 48 7/8’’x 21 1/2’’x 34’'

For USA :

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CaptairFlex M632
(Only available in the US)

consommation energetique - 121 W
Ext: 63’’x 24 3/4’’x 45 3/4’’ min 53’’ maxi.
Int: 61 3/4’’x 21 1/2’’x 34’’

Only available in USA :
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CaptairFlex_hotte_a_filtration XLS392
CaptairFlex XLS392

consommation energetique - 121 W

Ext: 1000 x 800 x 1315/1495
Int: 965 x 695 x 1040

Ext: 39 1/2’’x 31 1/2’’x 51 3/4’’ min 59 7/8’’ maxi.
Int: 38’’x 26 1/4’’x 41’’

For USA :
 go to

CaptairFlex_hotte_a_filtration XLS483
CaptairFlex XLS483

consommation energetique - 191 W

Ext: 1275 x 800 x 1315/1495
Int: 1173 x 695 x 1040

Ext: 50 1/4’’x 31 1/2’’x 51 3/4’’ min 59 7/8’’ maxi.
Int: 48 7/8’’x 26 1/4’’x 41’’

For USA :

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CaptairFlex_hotte_a_filtration XLS633
CaptairFlex XLS633

consommation energetique - 191 W

Ext: 1600 x 800 x 1315/1495
Int: 1566 x 695 x 1040

Ext: 63’’x 31 1/2’’x 51 3/4’’ min 59 7/8’’ maxi.
Int: 61 3/4’’x 26 1/4’’x 41’’

For USA :
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CaptairFlex_hotte_a_filtration XLS714
CaptairFlex XLS714

consommation energetique - 261 W

Ext: 1800 x 800 x 1315/1495
Int: 1765 x 695 x 1040

Ext: 71’’x 31 1/2’’x 51 3/4’’ min 59 7/8’’ maxi.
Int: 69 1/2’’x 26 1/4’’x 41’’

For USA :

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NEW Sash Option
Reverso sash
Designed with you in mind.
The rotation of the panel allows you to optimize the total work area to meet the requirements of your applications and processes. The Reverso sash allows access to the lower or middle section of the enclosure, which provides an ergonimic position for the user.
Containment is maintained in both positions to guarantee users safety.

Download technical data sheet
Features on an Erlab CaptairFlex Ductless Enclosure
 control panel flex
Control panel
Flow monitor

This device monitors the air flow and ensures the user that the fan is working properly. 
Programmable Timer
This timer counts down the running hours of the unit and informs the user after every 60 hours of use a to perform a saturation detection test of the molecular filter.
(this feature is compliant with the AFNOR NF X 15- 211: 2009 standard)

flex-light Internal lighting
18 Watts - 500 Lux - IP68. Compact fluorescent lighting. From 1 to 3 tubes needed, depending on the model.

Sampling port Sampling port
It allows taking an air sample from the detection chamber in the filtration module in order to check the molecular filter saturation level, with the help of color coded tubes (not supplied).

 Air Flow meter
Air Flow meter
It measures the air face velocity which must be between 0.4 and 0.6 m/s
(this feature is compliant with the AFNOR NF X 15- 211: 2009 standard)

Energy ports  Energy ports
Located on the enclosure side panels, they allow the passage of power cables/fluid pipes in the enclosure without discomfort for the user. 

 Chemical Listing
Chemical Listing: The list of approved chemicals for Erlab filters
Erlab provides a booklet containing an exhaustive list of chemicals, certified by an independent test laboratory, that can be handled in the ductless enclosure in the conditions described in the AFNOR NF X 15- 211: 2009 standard.
The listing contains : the chemical name, the chemical formula, CAS number, boiling point, molecular weight, and saturation vapor pressure.
This booklet also indicates the best filter optipn for each chemical and its retention capacity, the type of filter saturation detection system needed, the maximum quantity of the chemical that can be introduced within the enclosure
Molecode S  Molecode S
Large spectrum filter saturation detection alarm
(Requirement for class 1 ductless fume hoods in the AFNOR NF X 15-211 : 2009 standard)
1 cell located in the detection chamber allows for the automatic detection of filter saturation by solvents.
1 cell in contact with the laboratory environment indicates ambient air pollution levels.

Mobicap  Mobicap
Metal mobile rolling cart equipped with 4 wheels (2 locking wheels).
Allows the safe relocation of a CaptairFlex ductless fume hood.
*only available on Captair M321 and Captair M391 models

 Benchcap Benchcap
Metallic fixed work bench.
Equipped with two height adjusting jacks.

Shelf  Shelf
Metallic adjustable sliding shelf for Mobicap™ and Benchcap™

 Tempered glass work surface Tempered glass work surface
With rounded edges for arm rest and a comfortable working position

 Phenolic resin work surface Phenolic resin work surface
Work surface with built-in retention tray, made of phenolic resin, with ergonomic edges for arm rest and a comfortable working position. High chemical and mechanical resistance. Ideal for accurate weighing operations.

Inox work surface Work surface in stainless steel
High chemical and mechanical resistance. Rounded corners to facilitate cleaning operations. Built in spill tray.
(Only available for the models : M 321, M 391,
XLS 483, XLS 714

 Back panel access door Back panel access door
Metallic. Located on the enclosure back panel, allows for an easy rear access to heavy and bulky instrumentations. Ideal for maintenance operations.
(Only available on CaptairFlex XL models)

 Transparent back panel Transparent back panel
Made of acrylic. Offers a 360 degree visibility in the enclosure and optimizes natural lighting.

 Particular Pre-filter Particulate Pre-filter
40 % filtration efficiency for particles > 0,3 μm
How an Erlab ductless enclosure works
A ductless enclosure is a safety device used to protect laboratory workers when handling chemicals that pose an inhalation risk.

These enclosures are equipped with filtration technology that is specific to the type of chemicals handled. These filters capture toxic molecules and particles evaporated in the hood and make it possible to:
  • Protect users in an effective manner
  • Reduce the carbon footprint by not releasing any toxic emissions into the atmosphere
  • Reduce operating costs due to their very low energy consumption
  • Eliminate all set-up costs related to the installation of a ducted airflow system.
1 - Air intake throught the openings
Air from the laboratory enters the hood through ergonomic openings. The air face velocity creates a dynamic barrier between the user and the chemicals being handled.
2 - Filtration of particles and molecules
The device ventilation system draws the particles and any molecules that have evaporated in the hood toward the filtration system. The level of containment provided by the hood prevents any pollutants from being released into the laboratory.

3 - Clean air into the laboratory
The filtration technology customized to the application traps the molecules that have evaporated within the enclosure. The discharged air is free from all pollutants.

4 - Purification of the ambient air
The continuous recirculation of the filtered air helps to purify the ambient air of the laboratory.

Flex Technology

The unique configurable design of the filtration column makes the CaptairFlex line of ductless fume hoods adaptable to the needs of most chemical applications. The ability to stack carbon and HEPA filters allows the filtration column to be configured specifically for the applications carried out within the hood.