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500 lbs capacity on each side of fan filter unit
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,Cleanroom Conversions,Cleanroom Conversions,Cleanroom Conversions,Cleanroom Conversions,Cleanroom Conversions,Cleanroom Conversions,Cleanroom Conversions,Cleanroom Conversions,Featured Products
Product Group:
6601-PP-68
6601-PP-68 83408

Smart® Walkable Fan Filter Units

• Filter Type: HEPA

• Available ISO Ratings: ISO 4, ISO 5, ISO 6, ISO 7, ISO 8

• ISO Class: ISO 4

• Unit of Measure: of 0

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Latest model - What's new
  • Stainless steel/ Powder-coated steel construction
  • EC (electronically commutated) brushless motor
  • HEPA filter
  • Walkable plenum rated to 250 pounds
CE Mark Logo ULus Listed WhisperFlow BioSafe classic logo ISO 4 Icon
Manufactured By: Terra Universal
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 Terra Part # Price Ships in
120/230 V Powder-Coated Steel 2'x2' HEPA Room-Side ISO 5 6601-22-HRW-EC 83582 $3,170 5-9 Days 2
120/230 V Powder-Coated Steel 2'x2' HEPA Top Side ISO 4 6601-22-HW-EC 83583 $3,304 5-9 Days 3
120/230 V Powder-Coated Steel 2'x3' HEPA Room-Side ISO 4 6601-23-HRW-EC 83597 $3,170 5-9 Days 4
120/230 V Powder-Coated Steel 2'x3' HEPA Top Side ISO 4 6601-23-HW-EC 83598 $3,304 5-9 Days 5
120/230 V Powder-Coated Steel 2'x4' HEPA Room-Side ISO 4 6601-24-HRW-EC 83599 $3,170 5-9 Days 6
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120/230 V Powder-Coated Steel 2'x4' HEPA Top Side ISO 4 6601-24-HW-EC 83600 $3,304 5-9 Days 7
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120/230 V Stainless Steel 2'x2' HEPA Room-Side ISO 5 6601-22-HRW-SS-EC 83557 $2,532 5-9 Days 8
120/230 V Stainless Steel 2'x2' HEPA Top Side ISO 5 6601-22-HW-SS-EC 83563 $1,581 5-9 Days 9
120/230 V Stainless Steel 2'x3' HEPA Room-Side ISO 5 6601-23-HRW-SS-EC 83566 $2,532 5-9 Days 10
120/230 V Stainless Steel 2'x3' HEPA Top Side ISO 5 6601-23-HW-SS-EC 83567 $1,581 5-9 Days 11
120/230 V Stainless Steel 2'x4' HEPA Room-Side ISO 5 6601-24-HRW-SS-EC 83568 $2,532 5-9 Days 12
120/230 V Stainless Steel 2'x4' HEPA Top Side ISO 5 6601-24-HW-SS-EC 83569 $1,581 5-9 Days 13
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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.
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Product Details
  • Top side or room-side replaceable fan filter unit
  • Ships in 120V configuration. Can be easily be reconfigured to 230V
  • High Efficiency Particulate Air (HEPA) Filter: 99.99% efficient at 0.3µm particle diameter
  • All-304 stainless steel or powder-coated steel BioSafe® housing, baffle plate, filter face grille, filter frame and impeller ensure optimal cleanliness and stand up to alcohol and other cleaning agents
  • Walkable plenum rated to 500 lbs on each side (excluding pre-filter)
  • Electronically commutated (EC) brushless motor with internal microprocessor
  • EC motor offers high performance, low energy consumption & low noise levels (40 dB)
  • Can be incorporated into Building Management Systems (BMS) to allow remote monitoring and control
  • MODBUS® networking control card with closed-loop control capability that supports air pressure, air flow, and particle count sensors
  • Motor control panel includes diagnostic indicator lights, manual speed adjustment, test probe jacks, CAT5e ports, control mode switch, and MODBUS® address DIP switch bank
  • FDA-approved silicone sealant
  • Internal baffling plate and diffuser panel provide quiet uniform air flow across the filter face
  • 1/4-20 UNC threaded inserts on corners to allow suspension by guy-wires
  • MERV 7 pre-filter, 30% ASHRAE rated
  • Low-profile design is ideal for cleanrooms with limited ceiling space
  • Removable yellow power cord with 4-pin connector for easy installation to Terra cleanrooms (connector may be used with an optional wall plug adapter; or  may be removed entirely to hard-wire the FFU)
  • Filters are leak tested in accordance with IEST standards and meet UL 900
  • See performance data and submittal sheets for additional information
  • Optional Accessories:
  •           Challenge port kit
  •           Power plug adapter
  •           Stainless surface mount frame for installing FFU in ceiling without T-grid
  •           12” ducted inlet connection adapter
  •           Replacement filter
  •           Filter replacement alarm
  •           Eye bolt package
  •           Ionizing bar
  •           Pre-filter safety cover, for CE conformance
  •           Control panel with night mode switch and power distribution modules
  • All filter sales are final; returns for this item cannot be accepted
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• Filter Type: HEPA

• Available ISO Ratings: ISO 4, ISO 5, ISO 6, ISO 7, ISO 8

• ISO Class: ISO 4

• Unit of Measure: of 0

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Fan Filter Units

  • Terra Universal's Walkable FFU
  • Terra Universal WhisperFlow® Hoods and Filter Fan Units
  • Portable HEPA Filtration System Watch Terra's Portable HEPA Filtration System Video
  • Watch Terra's Video on a HEPA Filtered Laminar Flow Cabinet Smoke Test
  • Fan Filter Unit with Vapor-Removal and Sanitizing Module Full Range of Designs, Configurations!
  • COVID-19 Contamination Control Products by Terra Universal
  • Ducted Reverse-Flow Fan Filter Unit COVID-19 Infection Control
  • EC HEPA Fan Filter Unit Smart WhisperFlow Fan Filter Unit with EC Motor
  • Room Side Replaceable Fan Filter Units (FFUs) Room Side Replaceable WhisperFlow® Fan Filter Units (FFUs)
  • Stainless Steel WhisperFlow Fan and Filter Units Stainless Steel WhisperFlow Fan and Filter Units, 2' x 4'
  • 2' x 4' Ducted HEPA Filter Unit Ducted HEPA Filter Unit, 2' x 4'
  • Cleanroom HEPA or ULPA Fan Filter Unit WhisperFlow Cleanroom HEPA Fan Filter Unit
Terra Universal's Walkable FFU allows for easier access and maintenance across the top of cleanroom builds. Terra Universal's Walkable FFU Terra Universal's Walkable FFU allows for easier access and maintenance across the top of cleanroom builds.
Terra Universal WhisperFlow® Hoods and Filter Fan Units This video gives an overview of our WhisperFlow® Laminar Flow Hoods and Filter Fan Units.
This video demonstrates the airflow of our vertical laminar flow hoods. The UL-Listed blower module with cleanroom-grade HEPA filter provides positive pressure laminar airflow to sweep away particulate contamination from the work surface.
Portable HEPA Filtration System
Terra's in stock portable HEPA filtration systems provide high quality and medical grade air filtration for your ambient environment. Watch Terra's Portable HEPA Filtration System Video The mobile/ self contained filtration system converts to any room to a negative pressure isolation room which then makes it well suited for medical clinics, schools, waiting rooms and other confined areas.
This smoke test demonstrates the airflow properties of Terra Universal's HEPA Filtered Laminar Flow Cabinet Watch Terra's Video on a HEPA Filtered Laminar Flow Cabinet Smoke Test This smoke test demonstrates the airflow properties of Terra Universal's HEPA Filtered Laminar Flow Cabinet
Fan Filter Unit with Vapor-Removal and Sanitizing Module
WhisperFlow® FFUs come in all styles: room-side replaceable, all-stainless steel, HEPA or ULPA filtration, EC energy-saving fans, reverse flow and more | 6602-30A displayed Full Range of Designs, Configurations! WhisperFlow FFUs come in all styles: room-side replaceable, all-stainless steel, HEPA or ULPA filtration, EC energy-saving fans, reverse flow and more (shown: vapor filtration module with UV sanitation lamp).
Terra Universal offers an extensive portfolio of COVID-19 contamination control products for employee protection, surface disinfection and product sterilization COVID-19 Contamination Control Products by Terra Universal As personal and professional lives shift dramatically in response to the COVID-19 pandemic, businesses are searching for methods to reduce the transmission risk of COVID-19 in the workplace. Terra Universal offers an extensive product portfolio to support employee protection, surface disinfection and product sterilization. Let’s take a closer look at two products designed to control the spread of COVID-19.
Ducted Reverse-Flow Fan Filter Unit
Terra’s reverse flow ducted fan filter units create negative pressure for airborne infection isolation spaces | 6601-24A-HVR displayed COVID-19 Infection Control Terra’s in-stock ceiling-mounted reverse-flow ducted filter fan units convert any space into a negative pressure isolation room
EC HEPA Fan Filter Unit
Smart WhisperFlow® Fan Filter Units feature electronically commutated motors for energy efficiency, quiet operation and remote speed control | 6601-24-H-EC displayed Smart WhisperFlow Fan Filter Unit with EC Motor Smart WhisperFlow® Fan Filter Units feature electronically commutated (EC) motors for improved energy efficiency, low noise, remote speed control and pressure balancing.
Room Side Replaceable Fan Filter Units (FFUs)
Room-Side Replaceable (RSR) WhisperFlow™ Fan/Filter Units allow filter replacement from inside of the cleanroom | 6601-24A-HR displayed Room Side Replaceable WhisperFlow® Fan Filter Units (FFUs) Room-Side Replaceable (RSR) WhisperFlow™ Fan/Filter Units allow HEPA or ULPA filter replacement from inside of the cleanroom; WhisperFlow® baffle system and anodized aluminum diffuser promote uniform air velocity across filter face.
Stainless Steel WhisperFlow Fan and Filter Units
Stainless Steel WhisperFlow® Fan/Filter Units feature a corrosion-resistant, ultra-smooth housing for aseptic facilities | 6601-24-USS displayed Stainless Steel WhisperFlow Fan and Filter Units, 2' x 4' Stainless Steel Fan/Filter Units feature a corrosion-resistant, ultra-smooth housing, filter frame and diffuser with ULPA filter for aseptic facilities requiring frequent sterilization; WhisperFlow® blffling system promote uniform air velocity across filter face.
2' x 4' Ducted HEPA Filter Unit
Ducted filter unit provides uniform flow of HEPA- or ULPA-filtered air to an enclosure (requires remote air handler) | 6601-24-HD displayed Ducted HEPA Filter Unit, 2' x 4' Ducted filter unit provides HEPA- or ULPA-filtered air to an enclosure (requires remote air handler). WhisperFlow baffling system ensures uniform face velocity (2 x 4 model shown).
Cleanroom HEPA or ULPA Fan Filter Unit
WhisperFlow Fan Filter Units (FFUs) provides a uniform flow of microfiltered air to meet cleanliness standards down to Class 10/ISO 4 | 6601-24-H displayed WhisperFlow Cleanroom HEPA Fan Filter Unit WhiperFlow Fan FIlter Units features internal baffling and adodized an aluminum diffuser that provide uniform air speed across the filter face for ISO-compliant laminar flow of HEPA or ULPA-filtered air.
Features & Benefits

Features and Benefits

Learn More: Filter Fan Units Prevent Infection
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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 pertusis : Whooping cough
  • Mycoplasma pneumoniae: Pneumonia
  • Chlamydia pneumoniae: Bronchitis
  • Clamydia 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
  • Alkaligenes: Opportunistic infections
  • Streptococcus pyogenes: Scarlet fever
  • Mycobacterium Tuberculosis: Tuberculosis

Walkable HEPA Fan Filter Unit

With this new sturdy walkable fan filter unit operators can now adjust and maneuver product as desired. HEPA filters on the fan filter unit provide a clean environment to meet all workspace needs.
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Air Shower Protection for Cannabis Grow Rooms

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