FREE CONSULTATION714-578-6100
  1. Home
  2. Modular Cleanrooms
  3. Fan Filter Units (FFUs), Lights, Ionizers

Fan Filter Units (FFUs), Lights, Ionizers
All in stock for immediate shipping!

WARNING:
Test the Airflow Uniformity of Your Fan/Filter Units!
Airflow uniformity is critical for applications requiring adherence to ISO, FDA or cGMP cleanliness requirements. More . . .
Fan/Filter Units provide the micro-filtered airstream that controls particulate contamination in a cleanroom or laminar flow clean bench. Terra's comprehensive line includes models based on High-Efficiency Particulate Air (HEPA) filters, rated 99.99% efficient @ 0.3 µm particles, and Ultra Low Penetration Air (ULPA) filters, rated 99.999% efficient @ 0.12 µm particles. Select the lights and other ceiling grid accessories to complete your system.

Fan Filter Units (FFUs) and Controls

WhisperFlow Fan/Filter Unit

WhisperFlow Fan/Filter Unit

WhisperFlow Fan Filter Units are quiet with low-vibration; cleanrooms get a constant uniform airflow to meet strict cleanliness standards

Stainless Steel WhisperFlow Fan/Filter Unit

Stainless Steel WhisperFlow Fan/Filter Unit

Stainless Steel WhisperFlow Fan Filter Units meets requirements for cleanliness and chemical compatibility

Room-Side Replaceable Fan/Filter Unit

Room-Side Replaceable Fan/Filter Unit

Minimize cleanroom downtime with these easy-to-replace filter units; direct room access prevents cleanroom breaches

Explosion Proof Fan/Filter Unit

Explosion Proof Fan/Filter Unit

Rest assured with this non-sparking, cast-iron, explosion-proof fan/filter unit; it provides uniform flow of HEPA- or ULPA-filtered air in hazardous locations

Explosion-Proof RSR FFU

Explosion-Proof RSR FFU

NEC hazardous locations that also need to be particle-free, benefit from explosion-proof fan/filter units. Room-side replaceable modules allow in-room access

Smart WhisperFlow ECM Fan Filter Units

Smart WhisperFlow ECM Fan Filter Units

Innovative Fan Filter Units have low-energy, electronically commutated (EC) motors. Unique design uses backward-inclined fans to reduce operating costs

Low Energy DC 4x4 Fan Filter Units

Low Energy DC 4x4 Fan Filter Units

Increase laminar flow performance in large cleanrooms with this 4’ x 4’ Low-Energy DC HEPA fan filter unit with electrically-commutated motor

Reverse-Flow Fan/Filter Unit

Reverse-Flow Fan/Filter Unit

Low-profile exhaust FFUs remove sub-micron particles, aerosols and fine dust allowing safe release of HEPA- or ULPA-filtered air without an exhaust system

Vapor Removal & Sanitizing Module

Vapor Removal & Sanitizing Module

Add carbon filtration to your fan/filter unit to attack vapors, and a UV sanitizer to wipe out most biological hazards inside the cleanroom

Ducted Filter Modules

Ducted Filter Modules

Low-profile, roomside replaceable modules provide ducted HEPA or ULPA filtered air when connected to an air handler or other air source

Narrow Fan/Filter Unit

Narrow Fan/Filter Unit

16-inch wide WhisperFlow HEPA fan/filter unit from Terra is a space-saving FFU featuring low noise, low vibration and three speeds for uniform airflow

Power Distribution Modules and Control Panels

Power Distribution Modules and Control Panels

Simplify connection of power for lights, fan/filter units and other ceiling modules with this NEC-compliant PDM and energy-saving control system

Wireless Control System

Wireless Control System

Turn off lights and air conditioning system and put fan filter unit in energy-saving mode at the press of a button on your mobile device

Cleanroom Controls

Cleanroom Controls

Versatile control systems provide traceable process conditions for cGMP, FDA, and USP compliance. Monitor and adjust airflow from a central location

Filter Replacement Alarm

Filter Replacement Alarm

Program back-pressure set-point and receive an automated alert when filters need replacing; avoid electrical fire hazards from overworked FFU motors

FFU Challenge Port

FFU Challenge Port

Use the fan/filter unit challenge port to assist with leak testing and help set the filter replacement schedule based on your operational conditions

Lighting & Other Ceiling Modules

Cleanroom Lighting

Cleanroom Lighting

Illuminate your room with modular lights including fluorescent, space-saving teardrop, flow-through modules and energy-efficient LED

Germicidal UV-C Lamp

Germicidal UV-C Lamp

Our Germicidal UV-C Lamp helps disinfect cleanrooms, labs and aseptic environments. A built-in safety sensor will turn off when motion is detected

Cleanroom Ionizers

Cleanroom Ionizers

Create a homogeneous stream of positive and negative ions to neutralize surface static charges with these Ionizing Bars. Stop ESD before it starts!

Ceiling Grid Panels

Ceiling Grid Panels

Effectively seal unoccupied ceiling grid bays with panels made of application-specific material. They are firmly held in place with ceiling clips

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

Pathogens: Bacteria   Disease
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
 

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

WARNING:
Don't underestimate the importance of uniform airflow!

ISO, FDA or cGMP laminar flow requirements necessitate uniform airflow velocity across the filter face of fan/filter units (FFUs). Many FFUs that appear to meet nominal cleanliness requirements fail to provide this uniformity, threatening the integrity of your clean processes.

What is airflow uniformity?
Certifiers measure air velocity at multiple (typically six or eight) locations across a filter face. Ideally, air speed measurements taken at these locations vary by no more than 15% from mean values. For example, in an ISO 5 laminar flow system with a specified minimum average air velocity of 90 fpm (feet per minute), the minimum air speed measurements typically should be in the range of 80 – 100 fpm.

Discrepancies greater than this create turbulence as the faster air streams (lamina) are drawn into the localized areas of lower pressure created by the slower ones.

The greater the airspeed differential, the more likely and the more severe this turbulence becomes, resulting in swirling that can suspend minute particles rather than sweeping them downward and out of the laminar flow system. Worse, localized turbulence can create second-pass air that swirls up and re-enters the downward flow, drawing particles upward and redistributing them into other locations inside the classified work space. Under such conditions, a cleanroom or laminar flow cabinet fails to meet ISO laminar flow conditions – and ceases to be a clean!

How does airflow uniformity differ from airflow average?
Some FFU manufacturers specify an average airflow (or average velocity) that can mask serious performance deficiencies.

In the case below, a Fan/Filter Unit produces an average airflow of 1004 CFM (cubic feet per minute) and average air speed of 125 fpm on high speed, perfectly acceptable performance values. However, individual lamina measurements demonstrate substantially non-uniform filter face velocity and flow, with discrepancies of over 60% at various locations across the filter (30% from mean values). FFU performance will create areas of turbulence due to this lack of uniformity.

turbulent zone illustration Turbulent zone created
by non-uniform velocity (characterization of competitor's FFU air velocity performance, in feet/minute)

How does a Fan/Filter Unit achieve airflow uniformity?
Several design and construction features help to ensure uniform FFU performance in Terra-manufactured FFUs. Most importantly, these FFUs include an internal baffling system and plenum chamber that equalize the air pressure across the filter face as the air exits the motorized impeller. Uniform inlet pressure correlates to uniform exit velocity, assuming a high-quality filter medium of uniform density and flow resistance.

In addition, Terra FFUs include a perforated anodized aluminum exit plate that both protects the filter medium against damage and helps to reinforce even air distribution across the filter face.

Finally, sound-deadening foam contributes to the rigidity of the structure while dampening noise and vibration, resulting in whisper-quiet operation that won’t interfere with operator health or productivity.

Although these measures add to the manufacturing cost of Terra FFUs, they contribute substantially to their performance (see comparative data below).


Turbulent Performance: Fan/Filter Unit with non-uniform airflow
Measurements of non-baffled 2' x 4' HEPA Fan/Filter Unit with AC impellerized motor, taken 6" from filter face (source: measurements taken on Terra competitor 2' x 4' HEPA FFU)
Speed Setting: High
Noise: 73 dBA
Average Speed: 125.5 fpm
Average Flow: 1004 cfm
Max. Deviation from Mean: 27.5%
High Speed
Top Right:
157 fpm
Top Center:
95 fpm
Top Right:
122 fpm
Bottom Left:
160 fpm
Bottom Center:
109 fpm
Bottom Right:
110 fpm

Medium Speed
Top Right:
58 fpm
Top Center:
47 fpm
Top Right:
53 fpm
Bottom Left:
61 fpm
Bottom Center:
39 fpm
Bottom Right:
34 fpm
Speed Setting: Medium
Noise: 60 dBA
Average Speed: 48.7 fpm
Average Flow: 389 cfm
Max. Deviation from Mean: 30%

Speed Setting: Low
Noise:  55 dBA
Average Speed: 7.6 fpm
Average Flow: 61 cfm
Max. Deviation from Mean:  Out of Spec
Low Speed
Top Right:
0 fpm
Top Center:
0 fpm
Top Right:
0 fpm
Bottom Left:
46 fpm
Bottom Center:
0 fpm
Bottom Right:
0 fpm

Laminar Performance: Terra Fan/Filter Unit with uniform airflow
Measurements Terra’s 2' x 4' HEPA Fan/Filter Unit (No. 6601-24-H) with AC impellerized motor, taken 6" from filter face
Speed Setting: High
Noise: 55 dBA
Average Speed: 139 fpm
Average Flow: 980 cfm
Max. Deviation from Mean: 13%
High Speed
Top Right:
150 fpm
Top Center:
125 fpm
Top Right:
149 fpm
Bottom Left:
137 fpm
Bottom Center:
121 fpm
Bottom Right:
154 fpm

Medium Speed
Top Right:
131 fpm
Top Center:
120 fpm
Top Right:
111 fpm
Bottom Left:
121 fpm
Bottom Center:
108 fpm
Bottom Right:
112 fpm
Speed Setting: Medium
Noise: 54 dBA
Average Speed: 117 fpm
Average Flow: 823 cfm
Max. Deviation from Mean: 12%

Speed Setting: Low
Noise: 53 dBA
Average Speed: 100 fpm
Average Flow: 703 cfm
Max. Deviation from Mean: 5%
Low Speed
Top Right:
105 fpm
Top Center:
96 fpm
Top Right:
103 fpm
Bottom Left:
98 fpm
Bottom Center:
96 fpm
Bottom Right:
105 fpm

File Type File Name Publication Date
White Paper (PDF) Airflow Uniformity and Fan Filter Units
Fan filter units help to remove contaminants from controlled environments. They are effective if designed well. Variables like speed and baffles contribute to an FFU's ability to maintain uniform air speed and direction. Read more about how FFUs help you comply with ISO and other regulations.
05/28/2015
Tech Resource (PDF) Calculating Clean Room Cleanliness: How many FFUs and Lights?
This tutorial provides practical tips for correlating the desired cleanliness level (per ISO/FS209 standards) to the required number of fan/filter units (FFUs). Also provides guidelines for specifying lights based on the type of operations being conducted.
05/15/2015
Tech Resource (PDF) HEPA and ULPA Particle Filters
HEPA and ULPA filters remove sub-micron particles from the air, which are too small to see but create BIG problems in many critical manufacturing operations. Read about filter capability and airflow resistance testing.
05/18/2015
Tech Resource (PDF) Charcoal Filter Life
Unlike HEPA and ULPA particle filters, activated charcoal filters create no additional backpressure when they near the end of their service life. So when do you replace them? Here's how to tell.
05/18/2015
Tech Resource (PDF) Chemical Filtration Table
This document shows the recommended air filter to use when working with chemicals commonly found in laboratory and manufacturing environments. An estimate of filter capacity is also documented, to help plan for replacement intervals.
05/18/2015
Manual (PDF) HEPA/ULPA Fan Filter Unit (CE Marked): Doc 1800-34-CE.pdf
CE-marked Fan/Filter Unit (FFU) Quick Start User Guide
08/13/2015
Manual (PDF) WhisperFlow™ Fan/Filter Units: Doc. #1800-34
Fan/Filter Unit (FFU) Quick Start Operating Manual. Find installation and maintenance instructions along with unit specifications.
04/22/2016
Manual (PDF) Explosion-Proof Room-Side Replaceable Fan Filter Unit
Specifications and instructions for Terra's Room-Side Replaceable (RSR) Explosion-Proof Fan/Filter Unit. See step-by-step instructions on how to change the filter from inside the cleanroom enclosure.
09/10/2015
Manual (PDF) Smart WhisperFlow™ Fan Filter Units: Doc. #1788-14
See installation and maintenance instructions, along with specifications, for Terra's low-energy, ECM Fan/Filter Unit, installed in cleanrooms and hoods.
05/13/2016
Go to...
Go To
Laboratory-Equipment.com