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Filter Replacement Access

ISO Class

Terra Part # Price Ships in
120 V Powder-Coated Steel Integrated LED and Ionizer 2'x2' HEPA Room-Side ISO 5 6601-22-HRLI 76038 $3,827 1-3 Days 2
Quick Ship+ 16 in stock
120 V Powder-Coated Steel Integrated LED and Ionizer 2'x3' HEPA Room-Side ISO 5 6601-23-HRLI 76041 $3,827 1-3 Days 3
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120 V Powder-Coated Steel Integrated LED and Ionizer 2'x4' HEPA Room-Side ISO 5 6601-24-HRLI 76043 $3,479 1-3 Days 4
Quick Ship+ 77 in stock
120 V Powder-Coated Steel Integrated LED Light 2'x2' HEPA Room-Side ISO 5 6601-22-HRL 76025 $2,464 1-3 Days 5
Quick Ship+ 11 in stock
120 V Powder-Coated Steel Integrated LED Light 2'x3' HEPA Room-Side ISO 5 6601-23-HRL 76028 $2,465 1-3 Days 6
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120 V Powder-Coated Steel Integrated LED Light 2'x4' HEPA Room-Side ISO 5 6601-24-HRL 76030 $2,241 1-3 Days 7
Quick Ship+ 81 in stock
220 V Powder-Coated Steel Integrated LED and Ionizer 2'x2' HEPA Room-Side ISO 5 6601-22-HRLI-220 76040 $3,424 5-7 Days 8
220 V Powder-Coated Steel Integrated LED and Ionizer 2'x3' HEPA Room-Side ISO 5 6601-23-HRLI-220 76042 $3,473 5-7 Days 9
220 V Powder-Coated Steel Integrated LED and Ionizer 2'x4' HEPA Room-Side ISO 5 6601-24-HRLI-220 76044 $3,522 5-7 Days 10
220 V Powder-Coated Steel Integrated LED Light 2'x2' HEPA Room-Side ISO 5 6601-22-HRL-220 76026 $2,298 5-7 Days 11
220 V Powder-Coated Steel Integrated LED Light 2'x3' HEPA Room-Side ISO 5 6601-23-HRL-220 76029 $2,583 1-3 Days 12
Quick Ship+ Only 5 left in stock
220 V Powder-Coated Steel Integrated LED Light 2'x4' HEPA Room-Side ISO 5 6601-24-HRL-220 76031 $2,396 5-7 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.

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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
Product Details
  • Available ISO Ratings: ISO 5, ISO 6, ISO 7, ISO 8
  • Turnkey system combines HEPA-filtered fan unit, LED light and ion bar
  • Easily installs into cleanroom, laminar flow hood or HEPA-filtered storage cabinet
  • 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
  • All FFU data is based on a standalone unit using 1” prefilter and clean filters
  • Includes a MERV 7 pre-filter
  • Data will vary depending on filter media and configurations with other products/systems, such as ductwork or hoods.

Unit of Measure: of 1

Marks & Listings: CE

Fan Filter Units

  • Terra Universal WhisperFlow® Filter Fan Units Terra Universal WhisperFlow® Filter Fan Units
Terra Universal WhisperFlow® Filter Fan Units
Features & Benefits

Features and Benefits

Learn More: Filter Fan Unit Testing

The ISO 14644-3 Guidelines for Cleanrooms and Associated Controlled Environments details a list of required and optional tests performed during certification of a cleanroom. Included in the list of optional tests is the installed filter system leakage test, including criteria for aerosol challenge testing, HEPA filter leak scanning, and leak penetration testing. These tests, as evidenced below, may not be required for a given application and should be mutually selected and agreed upon by the customer and supplier prior to order placement.

Table 2 lists other tests appropriate for testing of an installation. These tests can be applied in each of the three designated occupancy states. These tests may not be all-inclusive, nor may all of the tests be required for any given certification project. Tests and test methods should be selected in a manner agreed between the customer and supplier. Selected tests can also be repeated on a regular basis as part of a routine facility monitoring program (see ISO 14644-2). Guidelines for the selection of tests and a checklist of tests are given in Annex A. Test methods are outlined in Annex B.

The test methods described in Annex B are in outline form only. Specific methods should be developed to meet the needs of the particular application.

Optional tests Reference in ISO 14644-3:2005 Referenced in
Principle Procedure Apparatus
Airborne particle count for ultrafine particles 4.2.1 B.2 C.2 ISO 14644-1
Airborne particle count for macroparticles 4.2.1 B.3 C.3 ISO 14644-1
Airflow testa 4.2.2 B.4 C.4 ISO 14644-1 and ISO 14644-2
Air pressure difference testa 4.2.3 B.5 C.5 ISO 14644-1 and ISO 14644-2
Installed filter system leakage test 4.2.4 B.6 C.6 ISO 14644-2
Airflow direction test and visualization 4.2.5 B.7 C.7 ISO 14644-2
Temperature test 4.2.6 B.8 C.8 ISO 7726
Humidity test 4.2.6 B.9 C.9 ISO 7726
Electrostatic and ion generator test 4.2.7 B.10 C.10 -
Particle deposition test 4.2.8 B.11 C.11 -
Recovery test 4.2.9 B.12 C.12 ISO 14644-2
Containment leak test 4.2.10 B.13 C.13 ISO 14644-1 and ISO 14644-2
a: This is a required test based on ISO 14644-2. These optional tests are not presented in order of importance. The order in which tests should be performed may be based upon the requirements of a specific document or after agreement between the customer and supplier.

Most cleanroom applications will necessitate the required tests, based on the ISO 14644-2 and 14644-3 guidelines: an airborne particle count test, an air flow test, and an air pressure difference test. Specific applications, such as class 10 or cleaner aseptic spaces, or industrial regulations, such as USP <797> guidelines for sterile drug compounding, stipulate additional, regularly optional tests, including, but not limited to, filter system leakage measurements.

For the majority of cleanroom applications, Terra offers a standard, roomside-replaceable HEPA-filtered fan unit, designed to meet published specifications and industry standards. For certain applications requiring filter system leakage tests, Terra offers a premium, roomside-replaceable HEPA-filtered fan unit tested and certified in accordance with the ISO 14644-2 and 14644-3 guidelines for leakage rates.

Each customer must specify either the standard filter fan unit or the leak-tested filter fan unit prior to order placement in order to ensure the appropriate units are delivered to meet the unique specifications of each application.

Fan Filter Unit with Integrated Ionizer

Our FFU unit seamlessly merges filtration and ionization. The integrated ionizer releases negative ions, actively purifying the air. This unit enhances your environment, effortlessly capturing and neutralizing airborne particles for a cleaner space and protects sensitive parts.

Diffuser Panel Promotes Air Flow Uniformity and Protects Filter Integrity

Unlike other manufacturers, Terra’s FFUs include a unique perforated panel beneath the filter, acting as a shower head, to guarantee filter protection and laminar air flow uniformity, which prevents localized air swirling, particle build-up and turbulence.

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

Airflow Uniformity Improves 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.

WhisperFlow Quiet Operation Reduces Distracting Background Noise

Exposure to loud noises can lower the ability to focus on work and listen selectively, which may also lead to safety issues. Typical AC units can be annoyingly loud, measuring in the range of 70 dB (comparable to a vacuum cleaner). 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 (roughly 75% quieter than 70dB).

Catalog of CE-Marked Products

Terra offers over 1,700 CE-marked products configured for international voltage requirements

Products Compliant With Your ISO Rating

High-capacity, durable, ISO-compliant system rated for thousands of operating hours.
Available Accessories
Popular Accessories
For a full list of accessories, select a product then click Choose Accessories on that product page.
  • Energy-Efficient Lighting

    Energy-efficient LED lighting panels and strips help to lower electrical costs and minimize heat build-up in temperature-controlled environments.
  • 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.
  • 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.
  • 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).
  • 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.
  • 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).
  • 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.
  • 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).
  • Replacement Filters

    Purchase replacement filters ahead of time to prevent costly operational interruptions and avoid damage to fan blowers caused by excessive backpressure from long overdue filter replacements.
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Manuals & Resources
Manuals & Resources

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