6601-23B-HR-EC
Terra Part # 6601-23B-HR-EC
$2,156
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Fan Filter Unit; Smart® ECM, RSR, 2'x3', HEPA, 120/230 V, Powder-Coated Steel, WhisperFlow
Product Details
  • Available ISO Ratings: ISO 5, ISO 6, ISO 7, ISO 8
  • Customer must determine if filter system leakage testing is required for their application. This unit is not full seam welded. If a leak test is required, full seam welded units leak-tested to meet ISO 14644-3 are optionally available.
  • 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
  • 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

Type: Smart® ECM, RSR

Material: Powder-Coated Steel

Filter Replacement Access: Room-Side

Size: 2'x3'

Filter Frame Material: Aluminum

Filter: HEPA

Motor Type: Electronically Commutated (EC)

Motor HP: 1/3 hp

Airflow: Positive Pressure

Speed Control: Variable Speed Control Card

Blower Type: Forward Curved

Active Filter Face Area: 5.3 ft²

Pre-Filter: MERV 7

RoHS: Compliant

Unit of Measure: EA

Marks & Listings: CE, UL, ULC

Electrical Specifications: 120/230 V, 4.1 A, 1 Ph, 1 Ph

Weight, Product: 53 lb

Dimensions, Product: 23.63" W x 35.63" D x 15" H

Weight, Shipping: 53 lb

Dimensions, Shipping: 53" W x 53" D x 20" H

Package Type: Palletized

Manuals & Resources
Buy Accessories
  1. Provides a stream of static-neutralizing ions to protect ESD-sensitive components.  |  2005-16A displayed
    $847
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  2. 2’x3’ perforated 304 stainless steel, 12 gauge screen for room-side-replaceable fan filter unit  |  6601-63 displayed
    $168
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  3. Holds fan filter units secure in ceilings without grid.  |  6604-01 displayed
    $326
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  4. Cable Extension, PVC, 4 Poles, 5M, 22awg, 300V, straight male to straight female with close-up  |  6601-39 displayed
    $80
    Increase Down Increase Up
  5. Simplifies filter leak testing and connection of Filter Backpressure Alarm  |  6601-99 displayed
    $89
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  6. Eyebolt with 1/4"-20 thread for lifting FFUs  |  6601-02 displayed
    $23
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  7. Night service switch, shown mounted on Modular Hardwall Cleanroom panel, puts FFUs in low-energy mode during off-hours  |  6601-70 displayed
    $147
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  8. Four-pin power cord adapter for fan/filter unit allows connection to standard 120VAC/60Hz power receptacle  |  6601-13 displayed
    $64
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  9. Safety Cover Aluminum For CE Applications  |  6601-15 displayed
    $43
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  10. FFU Connect pack includes flexible ducting and all hardware required to connect and seal the duct.  |  6601-01 displayed
    $202
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  11. Duct Flange Adapter for standard FFUs; 12" dia, 19.5" W x 19.5" D x 2" H, galvanized steel
    $153
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  12. FFU Testing and Certification; Flow Rate and Filter integrity
    Request Quote
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  13. FasTrak 24-7 Expediting Service
    Request Quote
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  14. Roomside replaceable filters offers gel-sealed filter seats securely against "knife-edge" on blower housing to form a tight seal  |  6601-27-R displayed
    $748
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  15. MERV 7 pre-filter for Terra Fan Filter Units (FFUs)  |  6601-34 displayed
    $183
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  16. Roomside replaceable filters offers gel-sealed filter seats securely against "knife-edge" on blower housing to form a tight seal  |  6601-27-R displayed
    $748
    Increase Down Increase Up

Fan Filter Units

  • Terra Universal WhisperFlow® Filter Fan Units Terra Universal WhisperFlow® Filter Fan Units
Terra Universal WhisperFlow® Filter Fan Units

Features and Benefits

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

Gel-Filled Channel on Room-Side Replaceable Filter

Gel-filled channel on room-side replaceable filter forms a tight seal against knife edge on fan housing, allowing fast, simple filter replacement from inside the cleanroom without the need for costly cleanroom shut-down.

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.

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).

Smart Fan Filter Unit with EC Motor

Smart WhisperFlow® Fan Filter Units are quiet, energy-efficient and easily adjustable, either manually or via automatic smart console, for centralized fan speed control and cleanroom pressure balancing.

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.
Popular Accessories
For a full list of accessories, select a product then click Choose Accessories on that product page.
  • 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 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).
  • 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.
  • Challenge Port; for Fan/Filter Unit

    Challenge port for Fan/Filter Units simplifies filter leak testing and connection of Filter Backpressure Alarm (shown mounted on SS FFU, 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).
  • 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.
  • 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.

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.