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FFU Type


Terra Part #PriceShips in
Powder-Coated Steel2'x3'ULPATop SideDuctless240 V 6601-23-UV-220-CE $1,5351-3 Days2
Powder-Coated Steel2'x3'ULPATop SideDuctless120 V 6601-23-UV $1,2881-3 Days3
Powder-Coated Steel2'x3'HEPATop SideDucted240 V 6601-23-HVF-220 $1,5915-9 Days4
Powder-Coated Steel2'x3'HEPATop SideDucted120 V 6601-23-HVF $1,4465-9 Days5
Powder-Coated Steel2'x3'HEPATop SideDuctless240 V 6601-23-HV-220 $1,2761-3 Days6
Powder-Coated Steel2'x3'HEPATop SideDuctless120 V 6601-23-HV $1,1601-3 Days7
Powder-Coated Steel2'x4'ULPATop SideDuctless240 V 6601-24-UV-220 $1,2881-3 Days8
Powder-Coated Steel2'x4'ULPATop SideDuctless120 V 6601-24-UV $1,2881-3 Days9
Powder-Coated Steel2'x4'HEPATop SideDucted240 V 6601-24-HVF-220 $1,5911-3 Days10
Powder-Coated Steel2'x4'HEPATop SideDucted120 V 6601-24-HVF $1,4465-9 Days11
Powder-Coated Steel2'x4'HEPATop SideDuctless240 V 6601-24-HV-220 $1,2761-3 Days12
Powder-Coated Steel2'x4'HEPATop SideDuctless120 V 6601-24-HV $1,1601-3 Days13
Powder-Coated Steel2'x2'ULPATop SideDuctless240 V 6601-22-UV-220 $1,2881-3 Days14
Powder-Coated Steel2'x2'HEPATop SideDucted240 V 6601-22-HVF-220 $1,5915-9 Days15
Powder-Coated Steel2'x2'HEPATop SideDucted120 V 6601-22-HVF $1,4465-9 Days16
Powder-Coated Steel2'x2'HEPATop SideDuctless240 V 6601-22-HV-220 $1,2761-3 Days17
Powder-Coated Steel2'x2'HEPATop SideDuctless120 V 6601-22-HV $1,1601-3 Days18
Stainless Steel2'x3'ULPATop SideDucted120 V 6601-23-UVFSS $1,8745-9 Days19
Stainless Steel2'x3'ULPATop SideDuctless120 V 6601-23-UVSS $1,7335-9 Days20
Stainless Steel2'x4'ULPATop SideDucted120 V 6601-24-UVFSS $1,8745-9 Days21
Stainless Steel2'x4'ULPATop SideDuctless120 V 6601-24-UVSS $1,7335-9 Days22
Stainless Steel2'x4'HEPATop SideDuctless120 V 6601-24-HVSS $1,6271-3 Days23
Stainless Steel2'x2'ULPATop SideDucted120 V 6601-22-UVFSS $1,8745-9 Days24
Stainless Steel2'x2'ULPATop SideDuctless120 V 6601-22-UVSS $1,7335-9 Days25
Powder-Coated Steel2'x2'HEPATop SideDuctless240 V 6601-22-HV-220-CE $1,4061-3 Days26
Powder-Coated Steel2'x2'ULPATop SideDuctless240 V 6601-22-UV-220-CE $1,5941-3 Days27
Powder-Coated Steel2'x3'HEPATop SideDuctless240 V 6601-23-HV-220-CE $1,4061-3 Days28
Powder-Coated Steel2'x4'HEPATop SideDuctless240 V 6601-24-HV-220-CE $1,4061-3 Days29
Powder-Coated Steel2'x4'ULPATop SideDuctless240 V 6601-24-UV-220-CE $1,5351-3 Days30
Filter Replacement Access
FFU Type
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Product Details

• Converts any space into negative pressure isolation room

• Ducted version includes a 12"-diameter flange for connection to exhaust systems

• Removes submicron particles for safe air release into cleanroom or laboratory

• Ideal for containing dust generated during maintenance or construction

• Applications: enclosures for cleanroom renovations, equipment repair

• Select HEPA filter (99.99% efficient @ 0.3 µm particles) or ULPA filter (99.999% efficient @ 0.12 µm particles)

• Quiet, low-vibration WhisperFlow design: only 50 dBA, measured 30" from filter face @ 90 FPM

• Provides airflow of 640+ CFM under filter load at Medium speed

• Three-speed switch simplifies air balancing

• Provides years of no-maintenance, 24/7 operation depending on your air quality

• Internal baffling plate and diffuser panel provide quiet uniform air flow across the filter face

• MERV 7 pre-filter, 30% ASHRAE rated

• 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

Features & Benefits

Features & Benefits

Filter Fan Units Prevent Infection

Did You Know?
Fan/Filter Units Do More Than Meet ISO Requirements—they also prevent infection.

Most cleanroom professionals understand that FFUs capture contaminants that degrade particle-sensitive samples. But they also remove bacteria and many viruses and mold spores 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
  • Escherichia coli: Gastrointestinal infection
  • Bacillus anthracis : Anthrax
  • Aspergillus brasiliensis: Sinus infections
  • Francisella tularensis: Tularemia
  • Bordetella pertusis : Whooping cough
  • Mycoplasma pneumaoniae: 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

Eliminate Contaminants and Pathogens

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

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

Available Accessories

Popular Accessories

For a full list of accessories, select a product then click Choose Accessories on that product page.
  • Cord Adapter, MIN4 PL to 16AWG Power Cord for Terra Fan/Filter Unit
    Four-pin power cord adapter for fan/filter unit allows connection to standard 120VAC/60Hz power receptacle.
  • Stand for Cleanroom Fan Filter Unit
    Powder coated steel Fan Filter Unit stand supports up to two Fan/Filter Units for horizontal-flow applications (order FFU separately)
  • Filter Replacement Alarm
    The filter replacement alarm monitors filter backpressure and issues an alarm when filter needs replaced (requires selection of fan filter unit with challenge port, order separately).
  • 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).

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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.

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