Stop venting your budget. Ductless fume hoods protect staff from 700+ chemicals, including formalin, powders, acids, and small-volume solvents – filtered, monitored, safe, responsible.
DUCTLESS FUME HOODS
CHEMICAL CONTAINMENT ANYWHERE
Save thousands annually vs. ducted
Install in hours,
not months
ANSI/ASSP
Z9.5-2022
compliant
700+ chemicals validated
Real-time safety monitoring
Move and reconfigure anytime
Get a quote in 90 seconds
Fill out this short form, and your dedicated rep will get back to you within the day to help you select the perfect ductless fume hood for your needs.
The Complete Ductless
Laboratory Hood Solution
Whether you’re ready to buy ductless fume hood systems today or evaluating options, Erlab’s filtration technology adapts to your evolving needs – from teaching labs to pharmaceutical QC. Custom sizing is available as well.
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| 321 | 391 | 392 | 481 | 483 | 633 | 714 | |
| Width (in) | 30.7 | 39.6 | 39.6 | 49.6 | 50.4 | 63.1 | 71.1 |
| Depth (in) | 24.4 | 24.4 | 29.5 | 24.4 | 29.5 | 29.5 | 29.5 |
| Height (in) (min) | 43.7 | 43.7 | 52.8 | 43.7 | 52.8 | 52.8 | 52.8 |
| Height (in) (max) | 50.6 | 50.6 | 59.6 | 50.6 | 59.6 | 59.6 | 59.6 |
| # of filters | 1 | 1 | 2 | 1 | 3 | 3 | 4 |
| Real time safety monitoring |
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| Learn More | Learn More | Learn More | Learn More | Learn More | Learn More | Learn More |
321
Dimensions
Width: 30.7″
Depth: 24.4″
Height (min): 43.7″
Height (max): 50.6″
# of filters: 1
Learn More
391
Dimensions
Width: 39.6″
Depth: 24.4″
Height (min): 43.7″
Height (max): 50.6″
# of filters: 1
Learn More
392
Dimensions
Width: 39.6″
Depth: 29.5″
Height (min): 52.8″
Height (max): 59.6″
# of filters: 2
Learn More
481
Dimensions
Width: 49.6″
Depth: 24.4″
Height (min): 43.7″
Height (max): 50.6″
# of filters: 1
Learn More
483
Dimensions
Width: 50.4″
Depth: 29.5″
Height (min): 52.8″
Height (max): 59.6″
# of filters: 3
Learn More
633
Dimensions
Width: 63.1″
Depth: 29.5″
Height (min): 52.8″
Height (max): 59.6″
# of filters: 3
Learn More
714
Dimensions
Width: 71.1″
Depth: 29.5″
Height (min): 52.8″
Height (max): 59.6″
# of filters: 4
Learn More
Register Your Warranty And Extend
Your Protection For a Lifetime
Connect safety monitoring
Activate your free, real-time safety monitoring platform, eGuard.
Extend your warranty
Every time you replace your filter, your warranty extends by a year.
Connect safety monitoring
Activate your free, real-time safety monitoring platform, eGuard.
Extend your warranty
Every time you replace your filter, your warranty extends by a year.
Your Personal Ecosystem Of
Lifelong Protection in Erlab Safety Program
Your ductless fume hood is protected and supported by a vibrant ecosystem of services within the Erlab Safety Program, making sure it serves you well forever, even as your testing protocols and sample volumes evolve.
All visible, traceable, and accountable in a single Safety Program dashboard.
eValiQuest
Tells you the truth before you spend a dime. We analyze your chemistry against our filters’ 700+ validated chemicals. If ductless won’t work safely, we’ll say so and suggest alternatives. No games.
eValiPass
Means your hood arrives, gets installed, tested, and validated by our techs. Not yours. It’s a white glove service at no extra cost. Your team gets trained. You get documentation. No surprises, no extra invoices.
eValiGuard
Keeps you protected as your needs evolve. Chemistry changes? We reconfigure at no charge. New regulations? We update your system. Forever support, because your safety doesn’t have an expiration date.
AFNOR Certification. The Standard Your EH&S Team Respects
Every Erlab ductless fume hood conforms to AFNOR NF X 15-211:2009 – the certification that matters when your EH&S team asks tough questions. AFNOR requires exhaust concentrations below 1% of TLV under normal operating conditions, with mandatory detection systems and defined filter classes. You’ll walk into approval meetings with documentation that makes your life easy.
AFNOR Certification. The Standard
Your EH&S Team Respects
Every Erlab ductless fume hood conforms to AFNOR NF X 15-211:2009 – the certification that matters when your EH&S team asks tough questions. AFNOR requires exhaust concentrations below 1% of TLV under normal operating conditions, with mandatory detection systems and defined filter classes. You’ll walk into approval meetings with documentation that makes your life easy.
You Made the Smart Choice.
Now Make It Safer
When you’ve decided to buy ductless fume hood equipment, you’re looking for more than carbon filtration. You need documented safety, proven reliability, and a ductless fume hood manufacturer who understands that your chemistry – and your safety requirements – aren’t negotiable.
You Made the Smart Choice.
Now Make It Safer
When you’ve decided to buy ductless fume hood equipment, you’re looking for more than carbon filtration. You need documented safety, proven reliability, and a ductless fume hood manufacturer who understands that your chemistry – and your safety requirements – aren’t negotiable.
Leading Innovation For
Half A Century
Erlab invented the ductless laboratory hood market. While others are still figuring out filtration, we’re on our fifth decade of refinement. As the original ductless fume hood supplier to laboratories worldwide, our Advanced Innovation Center has validated more chemicals, tested more combinations, and solved more “impossible” applications than anyone else. When you purchase ductless fume hood technology from Erlab, you’re investing in proven evolution.
Leading Innovation For
Half A Century
Erlab invented the ductless laboratory hood market. While others are still figuring out filtration, we’re on our fifth decade of refinement. As the original ductless fume hood supplier to laboratories worldwide, our Advanced Innovation Center has validated more chemicals, tested more combinations, and solved more “impossible” applications than anyone else. When you purchase ductless fume hood technology from Erlab, you’re investing in proven evolution.
Ask A Colleague About Their Erlab Hood
More than a year with this hood and it is still going strong.
For a ductless laboratory, it works really well. The customer service on this equipment exceeds all expectations. We were assisted from initial set up to adjustments and frequent monitoring to ensure our equipment is up to standard.
Irvin Vides
CCAgriculture
Great hood!
Service from the representative was fantastic. I received the complete analysis of my experimental work and needed approval from the scientific team prior to purchasing the hood. So I feel safe using the hood for the applications in my research lab. When I received the hood, it was easy to set up. The hood is also very easy to use. I would recommend purchasing the stand to support the hood.
Keyur Rana
North Jersey District Water Supply Commission
Can’t live without it!
Hood is very effective for the acid digestions performed daily in the unit. Staff are very happy with ease of use and design. Would definitely purchase another one.
Kristen Simonds
NYSDOT
It’s exactly what we have been looking for. Perfect match for our application.
The Fume Hood allows us to distill Nitric Acid in an enclosed area in our clean-room without affecting nearby equipment or the sample preparation that we carry out in a separate Laminar Flow hood. It’s easy to use and the sensors will automatically detect when filters need to be changed.
Dennis DiMarco
Precilab LLC
More than a year with this hood and it is still going strong.
For a ductless laboratory, it works really well. The customer service on this equipment exceeds all expectations. We were assisted from initial set up to adjustments and frequent monitoring to ensure our equipment is up to standard.
Irvin Vides
CCAgriculture
Great hood!
Service from the representative was fantastic. I received the complete analysis of my experimental work and needed approval from the scientific team prior to purchasing the hood. So I feel safe using the hood for the applications in my research lab. When I received the hood, it was easy to set up. The hood is also very easy to use. I would recommend purchasing the stand to support the hood.
Keyur Rana
North Jersey District Water Supply Commission
Can’t live without it!
Hood is very effective for the acid digestions performed daily in the unit. Staff are very happy with ease of use and design. Would definitely purchase another one.
Kristen Simonds
NYSDOT
It’s exactly what we have been looking for. Perfect match for our application.
The Fume Hood allows us to distill Nitric Acid in an enclosed area in our clean-room without affecting nearby equipment or the sample preparation that we carry out in a separate Laminar Flow hood. It’s easy to use and the sensors will automatically detect when filters need to be changed.
Dennis DiMarco
Precilab LLC
DUCTLESS FUME HOOD FILTERS
A Convenience. Never A Burden
Erlab Fume Hood Filter Advantages
No hazardous waste disposal
Longest chemical retention
Real-time saturation monitoring
Universal compatibility
Your Benefit
Save thousands annually on waste management
Replace filters less frequently
Know exactly when to change filters
Works with Air Science Purair, Esco, and other major brands
Already Own Ductless Fume Hoods?
Upgrade to Erlab’s superior ductless fume hood filters without replacing your infrastructure. Our filters fit all major manufacturers’ hoods while delivering better protection and no hazardous disposal costs.
Whether you’re buying new or maximizing existing equipment, Erlab filtration technology delivers protection month after month.
Haven’t Decided If Ductless Fume
Hoods Are Appropriate?
Why Ductless?
No Building Exhaust
No ductwork, roof penetrations, or
make-up air systems required
Fast Installation
Installs in hours, not months – just
plug and operate
Mobile & Reconfigurable
Move between labs, benches, or
buildings as needs change
Lower Energy Costs
Save up to 33% annually vs. ducted
hood operating costs
No Building Exhaust
No ductwork, roof penetrations, or
make-up air systems required
Fast Installation
Installs in hours, not months – just
plug and operate
Mobile & Reconfigurable
Move between labs, benches, or
buildings as needs change
Lower Energy Costs
Save up to 33% annually vs. ducted
hood operating costs
When chemistry is appropriate and filters are properly specified and maintained.
Is A Ductless Fume Hood Right For
Your Laboratory?
When does a ventless fume hood make sense, and when should you stick with ducted?
Where Ductless Excels
Known Chemistry
Predictable, validated chemicals
with established filter protocols
Limited Volumes
Small to moderate quantities that
match filter capacity
Specific Applications
Powder weighing, formalin
workflows, teaching labs, QC testing
Flexible Spaces
Leased buildings, temporary labs,
spaces without HVAC capacity
Known Chemistry
Predictable, validated chemicals
with established filter protocols
Limited Volumes
Small to moderate quantities that
match filter capacity
Specific Applications
Powder weighing, formalin
workflows, teaching labs, QC testing
Flexible Spaces
Leased buildings, temporary labs,
spaces without HVAC capacity
Powder Weighing & Balance
Stations
Your analytical balance needs stability, not turbulence. HEPA filtered fume hoods designed for weighing applications maintain the calm air your microbalance requires while capturing harmful particulates. Pharmaceutical QC labs, compounding pharmacies, and materials testing facilities choose ductless fume hood solutions specifically for this application.
Powder Weighing & Balance
Stations
Your analytical balance needs stability, not turbulence. HEPA filtered fume hoods designed for weighing applications maintain the calm air your microbalance requires while capturing harmful particulates. Pharmaceutical QC labs, compounding pharmacies, and materials testing facilities choose ductless fume hood solutions specifically for this application.
Histology & Pathology
Formalin and xylene are predictable, well-characterized chemicals – exactly what activated carbon filtration hoods handle best. Our specialty filters are validated for these specific compounds, with documented capacity and breakthrough monitoring.
Histology & Pathology
Formalin and xylene are predictable, well-characterized chemicals – exactly what activated carbon filtration hoods handle best. Our specialty filters are validated for these specific compounds, with documented capacity and breakthrough monitoring.
Teaching & Training Laboratories
When students work with limited chemical sets in controlled volumes, a portable chemical hood offers visibility, safety, and flexibility. Reconfigure your teaching lab each semester without calling facilities.
Teaching & Training Laboratories
When students work with limited chemical sets in controlled volumes, a portable chemical hood offers visibility, safety, and flexibility. Reconfigure your teaching lab each semester without calling facilities.
Leased Spaces & Temporary Labs
Can’t penetrate the roof? Working in a historic building? Setting up a temporary QC station? A self-contained fume hood installs anywhere with standard power – and moves with you when the lease ends.
Leased Spaces & Temporary Labs
Can’t penetrate the roof? Working in a historic building? Setting up a temporary QC station? A self-contained fume hood installs anywhere with standard power – and moves with you when the lease ends.
Where Ductless Doesn’t Belong
(And We’ll Tell You)
Hazardous Chemistry
Unknown chemistry, perchloric/hot
acids, highly toxic compounds
Radioactive Materials
Any work with radionuclides or
radioactive materials
Institutional Barriers
Some institutions prohibit or require
case-by-case EH&S approval
Hazardous Chemistry
Unknown chemistry, perchloric/hot
acids, highly toxic compounds
Radioactive Materials
Any work with radionuclides or
radioactive materials
Institutional Barriers
Some institutions prohibit or require
case-by-case EH&S approval
We won’t compromise your safety for a sale. Ductless fume hoods are NOT appropriate for:
- Perchloric acid or hot acid digestions (these require specialized wash-down ducted systems).
- Unknown or highly variable chemistry.
- Large-scale synthesis with significant heat generation.
- Radioactive materials.
- Any chemistry not validated through our eValiQuest process.
The Financial Reality
A traditional ducted hood costs between $4,600 and $9,300 just to operate – that’s documented by Harvard, LBNL, and peer-reviewed studies citing $3.70-$7.40 per CFM per year. Before you factor in the $15,000-$50,000 installation cost.
Your ductless fume hood cost includes the unit, installation, and ESP services. Yes, you’ll replace filters – typically $600-$1,200 every six months depending on usage.
But you’ll eliminate…
- Ductwork installation and permits.
- Roof penetrations and weatherproofing.
- Make-up air systems and rebalancing.
- Monthly energy waste from exhausting conditioned air.
Compliance Without Compromise
Your EH&S team will ask about standards. Here’s what matters.
- NFPA 45:2024 explicitly covers ductless hoods in sections 7.15 and 7.16.
- ANSI/ASSP Z9.5-2022 includes ductless in laboratory ventilation programs.
- ASHRAE 110 containment testing validates performance.
- CSA Z316.5 (Canada) specifically addresses ductless selection criteria.
Many universities require case-by-case approval for ductless laboratory hoods. We provide complete documentation packages including chemical validation, filter specifications, monitoring protocols, and test data. If your institution says no, we’ll help you understand why and work within their guidelines.
Signs You Need A Ductless Solution
These situations call for ductless fume hoods.
| Trigger | Your Situation |
|---|---|
Your Building Says No
|
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Your Timeline Says Now
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Your Budget Says Be Smart
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Your Chemistry Says It's Perfect
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If any of these sound familiar, a ductless fume hood might be your answer.
Extended Services. Free Value
Included In Your Investment
More than a manufacturer – your safety partner
eValiQuest
Know Before You Invest
Submit your chemical list. We’ll analyze each one against our validated database, calculate filter capacity, and provide honest recommendations. If ductless won’t work safely, we’ll tell you – and suggest alternatives from other manufacturers.
eValiPass
Professional Installation Included
Our certified technicians install, test, and validate your commercial ductless fume hood at no additional charge. We train your team, and ensure compliance with your institutional requirements.
eValiGuard
Lifetime Protection
Your chemistry evolves. Your recirculating fume hood should too. ValiGuard provides:
- Annual safety inspections.
- Filter optimization as chemistry changes.
- Software updates and monitoring upgrades.
- Complete reconfiguration if you change applications.
- All at no additional cost.
Your Concerns Are Valid.
And We Have The Answers
You worry about the same things your colleagues worry about. Here’s what we tell them.
| Your Concern | The Reality | The Proof |
|---|---|---|
| “Are these actually compliant and safe?” | NFPA 45:2024 explicitly covers ductless hoods in sections 7.15 and 7.16 | ASHRAE 110 containment tests, ANSI/ASSP Z9.5 compliance documentation provided |
| “Filters will saturate and break through” | AFNOR NF X 15-211 requires <1% of TLV at exhaust with automatic detection | Real-time monitoring alerts you before breakthrough - see our 700+ chemical validation list |
| “Our EH&S won’t allow ductless” | Many institutions require case-by-case approval - we handle that | Complete EH&S submission packet with chemistry list, filter specs, monitoring protocols, test data |
| “Total cost might be higher with filters” | Ducted: $4,600–$9,300/year energy + installation. Ductless: About 33% lower | We’ll calculate your specific TCO comparing avoided installation + energy vs. filter costs |
| “Where’s the performance proof?” | Recent Z9.5 documentation standard with every hood | Commissioning data, training records, and ongoing monitoring reports all included |
Every objection has been answered thousands of times. We’ve been doing this since 1968. Your concerns are exactly why we created eValiQuest – to evaluate your specific situation before you invest.
How Your Colleagues
And Mentors Go Ductless
Case studies from around the world and across industries.
See how an application that reflects yours benefits from ductless.
Tefal
In a new lab build, Tefal discovered the planned ventilation system could not accommodate the required number of fume hoods. The building’s system had been undersized despite the substantial investment.
Ajinomoto Omnichem
A lab in a rented building couldn’t accommodate the venting capacity needed for pesticide and surfactant R&D and QA. Relocating would incur monumental costs.
Harvard University
A basement lab studying ultracold atoms and quantum physics was inaccessible for ducted venting. A low flow fume hood didn’t meet EH&S standards for face air flow velocity.
Tefal
In a new lab build, Tefal discovered the planned ventilation system could not accommodate the required number of fume hoods. The building’s system had been undersized despite the substantial investment.
Ajinomoto Omnichem
A lab in a rented building couldn’t accommodate the venting capacity needed for pesticide and surfactant R&D and QA. Relocating would incur monumental costs.
Harvard University
A basement lab studying ultracold atoms and quantum physics was inaccessible for ducted venting. A low flow fume hood didn’t meet EH&S standards for face air flow velocity.
International Deployment
Since Day One
Europe, America, Asia… In 50 years, the group has established itself in all markets with high growth potential or strategic stakes. The winning spirit of Erlab’s men and women ensures a daily presence all over the world. Every day, Erlab’s teams innovate in Val-de-Reuil, a few kilometers north of Boston or a short hour’s drive from Shanghai.
USA
Europe
Asia
USA Headquarters
Erlab, Inc. 388 Newbutyport Turnpike Rowley,
MA 01969 USA
Tel: (800) 964-4434, (978) 948-2216
Fax: (978) 948-3354
[email protected]
European Headquarters
Erlab DFS SAS Parc d’Affaires des Portes –
BP403 27104 Val de Reuil Cedex FRANCE
Tel: +33 (0) 2 32 09 55 80
Fax: +33 (0) 2 32 09 55 90
[email protected]
Asia Headquarters
Kunshan Erlab DFS Co., Ltd No. 118 FENG QIN Rd.
KETD Kunshan Jiangsu Province PR China 215334
Tel: +86 (0) 512 5781 4085
Fax: +86 (0) 512 5781 4082
[email protected]
Frequently Asked Questions
Safety & Compliance
Are ductless fume hoods actually safe?
When properly specified for your chemistry, absolutely. Erlab hoods meet AFNOR NF X 15-211:2009, maintaining exhaust concentrations below 1% of TLV. We validate safety for 700+ specific chemicals and won't sell you a hood for chemistry we haven't verified.
What standards do Erlab hoods meet?
Our hoods comply with AFNOR NF X 15-211:2009 (the most stringent molecular filtration standard), and are designed to operate within NFPA 45:2024 guidelines, ANSI/ASSP Z9.5-2022 ventilation programs, and pass ASHRAE 110 containment testing.
Does my institution allow ductless hoods?
Policies vary. Some institutions prohibit them, others require case-by-case approval, and many embrace them for specific applications. We'll work with your EH&S team, providing documentation and test data to support the approval process.
Filters & Monitoring
How often do filters need replacement?
Typically every 6-12 months, depending on chemical usage, volumes, and hood operation hours. Our real-time monitoring alerts you before breakthrough, and EValiQuest provides estimated filter life based on your specific chemistry.
What happens if my chemistry changes?
Through ValiGuard, we'll reevaluate your need at no charge. This might mean different filters, adjusted monitoring parameters, or in some cases, determining that your new chemistry requires ducted ventilation.
How does breakthrough detection work?
Erlab's Smart technology continuously monitors exhaust air. When filter saturation approaches safe limits, you receive alerts through the hood display and mobile app - well before any safety risk.
What about filter disposal?
Spent filters can be disposed of with any other lab waste. They are not hazardous and do not leach contaminants into the environment.
Cost & ROI
What's the real cost comparison with ducted hoods?
Ducted hoods cost $4,600-$9,300 annually to operate (documented at $3.70-$7.40 per CFM per year), plus $15,000-$50,000 for installation. A ductless fume hood price includes the unit and ESP services, with filter replacement typically around 33% lower twice yearly. Most users see ROI within 18-36 months.
Are there hidden costs?
No. Your investment includes the hood, professional installation (ValiPass), and lifetime support (ValiGuard). The only ongoing cost is filter replacement, which we estimate during EValiQuest.
What about energy savings?
Ducted hoods exhaust conditioned air 24/7 - equivalent to the energy use of 3.5 homes per hood. Mobile fume hoods from Erlab recirculate filtered air, eliminating this energy penalty while maintaining safety.
Applications & Limitations
What chemistry works with ductless?
We've validated over 700 chemicals including common solvents, acids at room temperature, bases, and specialty compounds like formalin and xylene. EValiQuest determines compatibility for your specific list.
What absolutely won't work?
Perchloric acid, hot acid digestions, unknown chemistry, highly exothermic reactions, radioactive materials, and any chemicals not validated through our process. We'll be direct about limitations.
Can I use ductless for powder weighing?
Yes - it's actually ideal. HEPA filtered fume hoods maintain the stable air your balance needs while capturing particulates. Many pharmaceutical QC labs choose ductless specifically for weighing applications.
What about teaching laboratories?
Perfect fit. Known chemistry, controlled volumes, and the ability to reconfigure each semester make portable fume hoods ideal for education. The 360° visibility of many models enhances instruction.
Installation & Facilities
Do I need special electrical or ventilation?
Most models require only standard electrical outlets (115V or 230V). No external ventilation, ductwork, or make-up air systems needed.
How long does installation take?
Typically 2-4 hours. ValiPass includes delivery, setup, containment testing, and training. Compare that to weeks or months for ducted installation.
Can I move the hood later?
Yes. The mobile fume hood design means you can relocate as needs change - to a different bench, room, or even building. Just roll it to the new location and plug it in.
What about multi-user facilities?
Our app-based management system lets you monitor all Erlab hoods from a single interface. Set user permissions, track usage, schedule maintenance, and receive alerts for your entire facility.
When to Choose Ducted Instead
Do I need special electrical or ventilation?
Most models require only standard electrical outlets (115V or 230V). No external ventilation, ductwork, or make-up air systems needed.
How long does installation take?
Typically 2-4 hours. ValiPass includes delivery, setup, containment testing, and training. Compare that to weeks or months for ducted installation.
Can I move the hood later?
Yes. The mobile fume hood design means you can relocate as needs change - to a different bench, room, or even building. Just roll it to the new location and plug it in.
What about multi-user facilities?
Our app-based management system lets you monitor all Erlab hoods from a single interface. Set user permissions, track usage, schedule maintenance, and receive alerts for your entire facility.
Ready To Evaluate Your Ductless Options?
Whether you’re ready to buy ductless fume hood equipment for your expanding teaching lab, setting up powder weighing stations, or looking to reduce energy costs, let’s determine if our ductless fume hood technology fits your needs. As the leading ductless fume hood manufacturer since 1968, we’ll provide an honest assessment.
No obligations. No sales pressure. Just honest assessment of whether ductless technology matches your chemistry, your facility, and your safety requirements.
