Worldwide Pricing and Secure Global Shipping Available!
Terra Universal Home
Menu
Units
US
Account
Shopping Cart
Cart 99+
Quote Cart
Quote
Explosion-Proof Reverse-Flow FFUs isolate and contain electrical components to safely exhaust combustible powders | 6601-22-UVFSS displayed
Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan/Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units
Product Group:
6601-PP-19
6601-PP-19

Explosion-Proof Fan Filter Units, Reverse Flow

Manufactured By: Terra Universal
  • Available Certified ISO Grade Designs: ISO 5, ISO 6, ISO 7, ISO 8
  • Exhaust flow fan filter unit converts any room into a negative pressure isolation/containment room
  • Explosion-proof FFU meets NEC requirements for Class I/Class II, Division 1 Hazardous locations
  • Non-sparking motor, mounted in a cast-iron, explosion-proof housing
  • Mounts into ceiling bay to remove sub-micron particles and provide safe exhaust
  • Minimize cleanroom service downtime with room-side-replaceable (RSR) fan filter units

• Certified ISO Grade Design: ISO 5

Read more
Stocked CE Mark Logo ULus Listed WhisperFlow Explosion Proof Icon BioSafe classic logo ISO 5 Icon
Manufactured By: Terra Universal
Need Help?

(714) 578-6100

Mon-Fri, 7am - 6pm PST

Chat

Want a quote quickly ?
Submit a QuickQuote request
Learn More: Terra's Stocking Programs
Select Product
Voltage

Sort Order:
Material

Sort Order:
Size

Sort Order:

Unit of Measure:
Filter

Sort Order:
Filter Replacement Access

Sort Order:

Unit of Measure:
Special Application

Sort Order:

 Terra Part #Price Ships in
120/240 V Stainless Steel 2'x3' ULPA Room-Side w/ Dust Collector Pan Explosion-Proof 6601-23A-UEVRSS $6,532 10-10 Days2
120/240 V Stainless Steel 2'x3' ULPA Top Side Explosion-Proof 6601-23-UEVSS $6,761 0-2 Days3
Quick Ship+ Available Only 4 left in stock
120/240 V Stainless Steel 2'x4' ULPA Room-Side w/ Dust Collector Pan Explosion-Proof 6601-24A-UEVRSS $6,533 0-2 Days4
Only 7 left in stock
120/240 V Stainless Steel 2'x4' ULPA Top Side Explosion-Proof 6601-24-UEVSS $6,148 0-2 Days5
Quick Ship+ Available Only 5 left in stock
120/240 V Stainless Steel 2'x2' ULPA Room-Side w/ Dust Collector Pan Explosion-Proof 6601-22A-UEVRSS $6,532 10-14 Days6
120/240 V Stainless Steel 2'x2' ULPA Top Side Explosion-Proof 6601-22-UEVSS $6,761 1-3 Days7
Quick Ship+ Available Only 4 left in stock
Voltage
Material
Size
Filter
Filter Replacement Access
Special Application
ORDERED
Item ordered before. Click on bagde to see the order.

Up to 30-day trial periods, free return shipping and on-site training available for qualified equipment.

Request demo from your product specialist or add note to your order or quote request.

* *
*See discounts and promos in cart Web-exclusive discount applies only to quotes/orders placed directly on our website; not valid for phone, email, or other ordering methods.
*includes web discount for online orders Web-exclusive discount applies only to quotes/orders placed directly on our website; not valid for phone, email, or other ordering methods.
CONFIGURE & ADD TO CART
− +
− +
Custom-configured product. Contact Terra by phone, chat or email for a project-specific quote.
− +
Custom-configured product. Contact Terra by phone, chat or email for a project-specific quote.
See Product Details
Free shipping in contiguous USA
Some ship in:
Usually Ships in:
Back to product group
Show more
Product Details
Product Details
Features & Benefits
Available Accessories
Products similar to this one
Buy Accessories
Manuals & Resources
Product Details
Product Details
  • Available Certified ISO Grade Designs: ISO 5, ISO 6, ISO 7, ISO 8
  • Exhaust flow fan filter unit converts any room into a negative pressure isolation/containment room
  • Explosion-proof FFU meets NEC requirements for Class I/Class II, Division 1 Hazardous locations
  • Non-sparking motor, mounted in a cast-iron, explosion-proof housing
  • Mounts into ceiling bay to remove sub-micron particles and provide safe exhaust
  • Minimize cleanroom service downtime with room-side-replaceable (RSR) fan filter units
  • Performance Data and Submittals
  • Explosion-Proof Design:
  • Explosion-proof motor meets NEC requirement for Class I Group C and D, Class II Group F and G, Division 1 hazardous locations.
  • All wiring embedded in filled, rigid conduit in accordance with Class I/II requirements.
  • NOTE: Proper installation of explosion proof equipment is critical to maintaining the explosion-proof protection aspects of the system. Customer must hard wire the motor/ffu in correlation to their specified voltage at time of installation. Therefore all wiring for explosion proof systems should be done in the field per local code by a licensed electrician.
  • FFU Design:
  • All-304 stainless steel BioSafe® housing, baffle plate, filter face grille, and filter frame ensure optimal cleanliness and stand up to alcohol and other cleaning agents.
  • Internal baffling plate and diffuser panel provide quiet uniform air flow across the filter face.
  • 1/4 (6 mm) -20 threaded holes in top corners accommodate eyebolts to facilitate installation using suspended guy wires (order eye bolt package separately).
  • FDA-approved silicone sealant without harmful chemicals seals inside housing to prevent air leakage (specify acrylic urethane or other required sealant type when FFU is ordered).
  • ULPA Filter: 99.999% efficient Ultra-Low Penetration Air, rated at particles 0.12µm diameter, shipped uninstalled to prevent damage during shipping.
  • Medical grade filters are leak tested in accordance with IEST standards and meet UL 900.
  • See performance data and submittal sheets for additional information.
  • NOTE: Because filters are delicate and subject to damage during handling, all filter sales are final; no returns can be accepted.
  • Room-Side Replaceable (RSR) Filter for Bag-in/Bag-out (BIBO) Replacement:
  • RSR designs allow quick and safe Bag-in/Bag-out (BIBO) filter replacement from the inside of the room for contact-free removal of filters with potentially hazardous airborne contaminants. Because it eliminates the need for roof access or breaching the cleanroom, an RSR model also greatly reduces maintenance time and related costs.
  • Gel-sealed filter seats securely against a knife-edge on the fan housing.
  • Easy-open clips allow fast filter replacement from the room side without breaching the cleanroom ceiling.
  • Filter shipped uninstalled to prevent shifting in the mounting gel that could cause leaks.
  • Dust Collector Pan:
  • Collector pan accumulates dust particles that dislodge from the HEPA filter, preventing contaminants from re-entering the cleanroom. Collector pan is easily removed for cleaning or maintenance.
  • For applications involving toxic fumes or biohazards, module seamlessly integrates with bag-in/bag-out system for safe filter disposal and replacement.
  • Optional Accessories:
  • Stainless steel surface mount frame for installing FFU in ceiling without T-grid.
  • 12" duct adapter for connection to safe exhaust outside of room.
  • Top safety cover, for CE conformance.
  • Replacement filters.
  • Eye bolt package for cable suspension.
  • Includes:
  • (1) Dust collector pan.
  • (1) MERV 7 filter (30% ASHRAE rated), 19.5" x 19.5" x 7/8" thk.

• Certified ISO Grade Design: ISO 5

• Marks & Listings: UL, ULC

Show more

Fan Filter Units

  • Terra Universal WhisperFlow® Filter Fan Units Terra Universal WhisperFlow® Filter Fan Units
Terra Universal WhisperFlow® Filter Fan Units
Overview video of Terra Universal's comprehensive portfolio of filter fan units Terra Universal WhisperFlow® Filter Fan Units Overview video of Terra Universal's comprehensive portfolio of filter fan units
Features & Benefits

Features and Benefits

Learn More: Filter Fan Units Prevent Infection
Print Copy Copied

Did You Know?
HEPA/ULPA Filters Do More Than Meet ISO Requirements - they also prevent infection.

Most cleanroom professionals understand that HEPA and ULPA filters capture contaminants that degrade particle-sensitive samples. But they also help remove bacteria, mold spores, and many viruses that contribute to a host of infections.

Most common bacteria are contained by the 0.3-micron pore size of high-efficiency particular air (HEPA) filters. Ultra-Low Penetration Air (ULPA) filters, which are rated 99.999% efficient at retaining particles of 0.12 microns and larger in diameter, capture ultra-fine contaminants, including many large viruses and mold spores.

These filters also remove aerosol-born pathogens - germs that hitch a ride on larger particles and liquid droplets that are captured in a HEPA or ULPA filter. HEPA- or ULPA-based Fan/Filter Units (FFUs) thus can play an important role in infection prevention in surgical theaters, ICUs and other medical settings.

Additionally, HEPA filters can help filter pollen, tiny insects, bacteria, mold, and other fungal spores that might be present during plant tissue culture or cannabis production. Contaminants such as these can find a way in via personnel or normal HVAC units and can blight crops and reduce yields. HEPA Filters help increase crop yields, pass inspection/meet regulations, and reduce contamination.

Here is a list of common human pathogens that HEPA/ULPA filters capture and remove from circulation:

Pathogens: Bacteria and Diseases
  • SARS-CoV-2: Coronavirus (COVID-19)
  • Escherichia coli: Gastrointestinal infection
  • Bacillus anthracis : Anthrax
  • Aspergillus brasiliensis: Sinus infections
  • Francisella tularensis: Tularemia
  • Bordetella pertussis : Whooping cough
  • Mycoplasma pneumoniae: Pneumonia
  • Chlamydia pneumoniae: Bronchitis
  • Chlamydia psittaci : Psittacosis
  • Klebsiella pneumoniae: Opportunistic infections
  • Haemophilus influenzae : Meningitis
  • Coxiella burnetii: Q fever
  • Pseudomonas aeruginosa: Opportunistic infections
  • Actinomyces israelii: Actinomycosis
  • Legionella pneumophila: Legionaire's disease
  • Thermoactinomyces sacchari: Farmer's lung
  • Alcaligenes: Opportunistic infections
  • Streptococcus pyogenes: Scarlet fever
  • Mycobacterium Tuberculosis: Tuberculosis

Protect Against Contaminants and Pathogens

HEPA and ULPA filters help capture many bacteria, viruses (COVID-19), and mold spores that contribute to a host of infections for both humans and plant/animal tissue cultures

Non-Sparking Direct-Drive Motor

Explosion-proof motors use a non-sparking polypropylene fan and cast-iron brackets attached to the heavy duty rolled steel frame

Gel-Filled Channel on Room-Side Replaceable Filter

Gel-filled channel on room-side replaceable filter forms a tight seal against knife edge on fan housing, allowing fast, simple filter replacement from inside the cleanroom without the need for costly cleanroom shut-down.

Explosion-Proof Junction Box

The reinforced junction box of the explosion-proof fan filter unit is built to withstand and contain an explosive reaction within the conduit system.

Long Running FFU Motors

Terra’s filter fan unit motors are rated for 5 years of continuous, 24/7 operation, if the HEPA filters are consistently replaced. To accurately monitor your HEPA filter’s saturation levels, purchase Terra’s audible and visual filter replacement alarm system.

Easy-Release Filter Clamp on Room-Side Replaceable FFU

Easy-release clamps rotate to release filter on Room-Side Replaceable Fan Filter Units, simplifying filter servicing without the need for a cleanroom shut-down.

Explosion-Proof Power Switches

UL-rated explosion-proof switches are connected to the lights and blowers using specialized conduit with potted fittings. All electrical components are sealed to eliminate potential ignition points.

Explosion-Proof Potted Fittings

Conduit is filled with an expanding cement mixture to isolate explosion-proof components from potential sources of ignition; explosion-proof fittings meet requirements of NEC for Class I, Division 1 hazardous locations.

Pre-Filter Grounding Clip

A grounding wire connects the body of the Explosion-Proof FFU to a metal wireframe embedded in the pre-filter as a safeguard against sparking.

WhisperFlow Quiet Operation Reduces Distracting Background Noise

Exposure to loud noises can lower the ability to focus on work and listen selectively, which may also lead to safety issues. Typical AC units can be annoyingly loud, measuring in the range of 70 dB (comparable to a vacuum cleaner). Terra’s WhisperFlow design produces far lower noise levels for a quiet environment comparable to a library. At 90 ft/min output, units measure under 50 dB from only 1 ft away (roughly 75% quieter than 70dB).

Product Prices Honored Worldwide

From Argentina to Zimbabwe, Terra's customers pay a single web-listed price for each product

Catalog of CE-Marked Products

Terra offers over 1,700 CE-marked products configured for international voltage requirements

Products Compliant With Your ISO Rating

High-capacity, durable, ISO-compliant system rated for thousands of operating hours.
Available Accessories
Popular Accessories
For a full list of accessories, select a product then click Choose Accessories on that product page.
  • Energy-Efficient LED Lighting Panels

    Energy-Efficient Lighting

    Energy-efficient LED lighting panels and strips help to lower electrical costs and minimize heat build-up in temperature-controlled environments.
  • Explosion-Proof 40W LED Light Installed in Fume Hood

    Explosion-Proof 40W LED Light

    UL-listed for Class I, Division 1 and 2, Groups C and D areas, this low profile LED light produces 3,600 lumens and operates from 120 to 277VAC, 50/60Hz. The heat-dissipating housing increases the efficiency and lifespan of the LEDs.
  • Explosion-Proof Powder Distribution Module

    Explosion-Proof Power Distribution Module

    Explosion-Proof Power Distribution Module (PDM) meets NEC code for a Class I/Division 1 hazardous location; includes all relays, breaks and other cleanroom electrical components

  • Challenge Port for Fan Filter Unit

    Challenge port for Fan/Filter Units simplifies filter leak testing and connection of Filter Backpressure Alarm (shown with optional pressure gauge; must be ordered with FFU).
  • 2’x2’ replacement filter for roomside replaceable (RSR) Fan Filter Unit (FFU), inside view
    Learn More

    Replacement Filters

    Purchase replacement filters ahead of time to prevent costly operational interruptions and avoid damage to fan blowers caused by excessive backpressure from long overdue filter replacements.
Products similar to this one
Other products you may find relevant
  1. 2'W x 4'D LED panel mounted in Terra Universal Cleanroom | 3800-41 displayed
    Group of 7 products
    LED Light Panels From
    As low as $141
    Some ship in 1 - 3 days
  2. Cleanroom control panel provides centralized control and monitoring of cleanroom functions; status indicator LED blinks when FFU filters need replacement | 6600-23A-NS displayed
    Group of 5 products
    Standard Control Panels for Fan Filter Unit (FFU) Systems From
    As low as $4,425
    Some ship in 5 - 7 days
  3. Cleanroom control panel with built-in Tier 4 touchscreen console; datalogging (pressure/temp/RH) and FFU control for up to 16 rooms, 200 FFUs | 6607-04 displayed
    Group of 7 products
    Smart® Control Panels for Fan Filter Unit (FFU) Systems From
    As low as $5,696
    Some ship in 1 - 3 days
  4. Holds fan filter units secure in rigid ceilings without a T-bar grid. | 6604-00 displayed
    Group of 4 products
    Fan Filter Unit Mounting Frames From
    As low as $341
    Some ship in 0 - 2 days
  5. Lightweight 6-channel airborne particle counter with a sensitivity range from 0.2- 2.0 μm; ideal for spot-checking critical environments and cleanrooms
    Group of 4 products
    Lighthouse Handheld Airborne Particle Counters by LWS From
    As low as $4,346
    Some ship in 5 - 10 days
  6. Filter alarm enclosure with PLC features a digital touchscreen display, buzzer bypass switch, and conduit fittings for complete filter status monitoring | 2625-54C-SS displayed
    Group of 2 products
    Filter Replacement Alarm System for Fan Filter Units From
    As low as $799
    Some ship in 0 - 6 days
  7. Provides efficient disinfection of cleanrooms and laboratories | 3800-26 displayed
    Germicidal UV Illuminator; for Modular Cleanrooms, Universal, 120 V
    $3,013
    Usually Ships in 1 - 3 days
  8. fixture contains four UV light tubes for fluorescence detection | 3800-27 displayed
    Fluorescent Detection UV Illuminator; for Modular Cleanrooms, Universal
    $573
    Usually Ships in 5 - 7 days
  9. Be prepared! Don't get left in the dark. Emergency lighting panels give you enough time to get to safety or to work through a minor power interuption. | 3800-47A displayed
    Group of 2 products
    Cleanroom LED Light Panel with Built-In Emergency Battery From
    As low as $1,121
    Some ship in 2 - 4 days
  10. Wall-mount canopy fume hood provides 1200 CFM exhust fume ventilation with 4 blower speeds | 5015-14 displayed
    Group of 11 products
    Wall-Mount Canopy Fume Hoods From
    As low as $1,814
    Some ship in 1 - 3 days
  11. Ion bar kit safely neutralizes charges to protect against electro-static charges. Attaches to inside ceiling of glovebox. Ion bar sold separately. | 2005-92 displayed
    Group of 4 products
    Ionizing Bars From
    As low as $587
    Some ship in 1 - 3 days
  12. Automatically detects sensor fault | 5401-32A displayed
    Combustible Gas Leak Detector With Alarm, 120 V
    $350
    Usually Ships in 5 - 7 days
  13. 2' x 2' Cleanroom LED light panel with emergency battery back-up in case of power failure | 3800-48 displayed
    LED Light Panel with Built-In Emergency Battery, 2' x 2', Cleanroom-Grade
    $1,121
    Usually Ships in 2 - 4 days
  14. Filter Integrity and Performance Certification
    Filter Integrity and Performance Certification
    Request Quote
  15. Explosion-Proof fan ventilates fumes through carbon filters for safe indoor release (not for hazardous fumes; order work surface and light separately) | 2400-14 displayed
    Group of 20 products
    Floor-Mounted Explosion-Proof Ductless Fume Hoods From
    As low as $7,159
    Some ship in 1 - 3 days
  16. Four foot Protector Premier laboratory fume hoods by Labconco shown with optional storage cabinets | 3649-00 displayed
    Group of 6 products
    Protector Premier Explosion-Proof Laboratory Fume Hoods by Labconco From
    As low as $12,075
    Some ship in 41 - 43 days
  17. Sure-Grip EX safety can storage cabinets protect workers, reduce fire risks, and improve productivity by storing hazardous liquids in high performance | 2820-00A displayed
    Group of 10 products
    Sure-Grip® Flammable Liquid EX Safety Can Storage Cabinets from Justrite From
    As low as $1,188
    Some ship in 3 - 5 days
Buy Accessories
Manuals & Resources

On a tight schedule? Choose FasTrak 24/7 Priority Service to help meet your critical schedule for Terra-manufactured products, either before or after your order is placed.*

  • FasTrak 24/7 provides a 24/7 commitment to meet the shipping date YOU specify, regardless of quoted lead times.
  • FasTrak 24/7 assigns a dedicated production team plus a dedicated senior expeditor working three shifts to meet your delivery specification.
  • FasTrak 24/7 guarantees* to meet the agreed-to specified ship date.

Call for pricing. FasTrak service fees cover costs of additional services only, without additional profit.

 * Terra's FasTrak services limited guarantee: to ship on the ESD or date specified OR to refund up to 100% of FasTrak charges. This guarantee covers no direct, special, consequential or other damages and is strictly limited to up to 100% of the amount paid for FasTrak service. When a specified ship date is missed due to factors outside Terra's control (vendor performance, deliveries by shipping companies, etc.) and random factors such as accidents, the credit of up to 100% of the FasTrak 24/7 may not apply. FasTrak service requested after order placement will be quoted and accepted based on available time remaining before required ship date.