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Filter Replacement Access

ISO Class

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
Quick Ship+ Available
120/230 V Powder-Coated Steel 2'x4' HEPA Top Side ISO 4 6601-24-HW-EC 83600 $3,304 5-9 Days 7
Quick Ship+ Available
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
Filter Replacement Access
ISO Class
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.

Some ship in:
Usually Ships in:
Free shipping in contiguous USA
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
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

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

Fan Filter Units

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  • 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
Portable HEPA Filtration System
Features & Benefits

Features and Benefits

Learn More: Filter Fan Units Prevent Infection

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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