• Unit of Measure: of 1
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6601-PP-15 72260
WhisperFlow® Fan Filter Units
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Manufactured By: Terra Universal
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Product Details
• Minimizes cleanroom service downtime with room-side-replaceable fan filter units
• Room-side-replaceable filter units feature a Gel-sealed filter and easy-open clips to allow fast filter replacement from below without breaching the cleanroom ceiling
• WhisperFlow baffling technology supports uniform air speed across the filter face, ensuring laminar airflow
• Three speed settings simplify air balancing
• Low-profile design allows cleanroom installation inside rooms with standard 9-foot ceilings
• Meets IEST Recommended Practices
• Models with all-stainless steel housing and filter frame meet strictest cleanroom requirements
• Speak with a Terra sales associate for recommendations on quantities to meet specified requirements
• Quiet, low-vibration design: only 49 dBA, measured 30" from filter face @ 90 FPM
• Provides an average airflow velocity of 90+ feet per minute and airflow of 640+ CFM under filter load at Medium speed setting
• Choose from cold rolled steel or all stainless steel housing
• Choose from room-side-replaceable or top-side-replaceable filter
• HEPA (High-Efficiency Particulate Air) filters are rated 99.99% efficient at removing particles ≥ 0.3 microns
• ULPA (Ultra-Low Penetration Air) filters are rated 99.999% efficient at removing particles ≥ 0.12 microns
• Provides years of no-maintenance, 24/7 operation (depending on air quality)
• Motor: 1/4 HP Direct drive, thermally protected with automatic overload reset
• Forward-curved centrifugal fans
• 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
• 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
• Unit of Measure: of 1
• Marks & Listings: CE, UL, ULC
Features & Benefits
Features and Benefits
Filter Fan Units Prevent InfectionDid You Know?
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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
Air Flow Uniformity to Improve Laminar Flow
Non-uniform air speeds produce turbulence that can recirculate particles into the air stream. Unique WhisperFlow® FFU baffling system and anodized diffuser plate promotes uniform laminar airflow to minimize turbulence and effectively carry away contaminating particles.
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).
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
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.
Clean and Durable Powder Coat Finish
Terra’s signature white powder coat finish provides a clean aesthetic plus durable barrier to protect against corrosion. The formulation exceeds ASTM and ISO paint standards for hardness, thickness, humidity resistance, gloss and impact testing.
WhisperFlow Quiet Operation Reduces Distracting Background Noise
Exposure to loud noises can lower the ability to focus on work and listen selectively in conversations. Typical AC units measure ~60 dB at 100 ft. 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.
Highest Standards For Electronic Components
Terra’s electronic components are designed and built to the highest standards required by defense and semiconductor industries for long-term reliability and protection against damage, injuries, and electrical hazards.
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.-
Ionizing Bar; 22"L, with Installation Kit, for 24 x 24 Fan/Filter Unit
Ionizing bar, mounted to Fan/Filter Unit, provides a balanced stream of ions to the work area below to neutralize static charge and prevent electro-static discharge; 22" bar shown installed on 2' x 2' FFU. -
FFU Mounting Frame; Stainless Steel
Stainless steel Fan Filter Unit (FFU) mounting frame supports FFU on drywall or other rigid ceiling material, viewed from above ceiling panel (FFU not included). -
Night Service Saves Energy, Extends Filter Life!
Night service switch, shown mounted on Modular Hardwall Cleanroom panel, puts FFUs in low-energy mode during off-hours; saves 25% of fan operating costs and extends filter life. -
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). -
Fan Filter Unit Control System
Provides room-by-room monitoring and control of Smart WhisperFlow FFUs to maintain target pressure differentials for ISO classification; temperature, humidity and particle monitoring and data logging, as well as dynamic fan set-point control, also available. -
Power Distribution Modules for Cleanroom FFUs and Lights
UL-listed power distribution modules include all breakers, transformers and other electrical components for FFU/light connections; allows fast addition or relocation of FFUs or lights without the need for rewiring. -
Filter Covers Allow Ceiling Wash-Down
Ceiling panel covers allow wash-down and sterilization of cleanroom walls and ceilings without damage to filter medium; requires BioSafe glass or stainless steel wall panels, which stand up to biocides. -
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). -
Safely Mount FFU’s Above Floor for Horizontal Laminar Airflow
The portable FFU base stand can be easily positioned to supply Class 100 horizontal laminar flow into a room or enclosure. It can also be positioned next to sensitive equipment/materials that are mounted close to the floor.
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Manuals & Resources
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.
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