Terra Part # 6601-24A-H-EC-BP
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Smart® ECM Fan Filter Unit with integrated UPS battery system, 2'x4', HEPA, 120/230 V, Powder-Coated Steel
  • Energy efficient Smart FFU with integrated UPS battery system arrives fully assembled, ready for use
  • Handy and convenient Uninterruptible Power Supply (UPS) provides power when and where you need it
  • Battery system provides approx. 1-2 hr runtime depending on FFU speed setting
  • EC motor offers high performance, low energy consumption, and low noise levels (40 dB)
  • Suitable for mobile transport or applications that require protection from unexpected power outages
  • Ships in 120V configuration. Can be easily be reconfigured to 230V
  • Uninterruptible Power Supply (UPS) battery system:
  • UPS systems provide a backup battery-power supply that keeps critical equipment running without interruption when utility power supply is unavailable.
  • UPS System includes main UPS and add-on external rechargeable battery pack for longer runtimes.
  • Fully assembled plug-and-play design speeds up installation. No time-consuming connection of internal batteries by user required.
  • Intelligent battery management system extends battery life.
  • Estimated Runtimes:
  • 180W Load: 123 minutes.
  • 350W Load (max speed): 55 minutes.
  • NOTE: All estimates based on new, fully charged batteries under typical office environmental conditions.
  • Front panel LEDs alert you to a variety of performance conditions, including AC line present, automatic voltage regulation, UPS load level and replace battery.
  • External battery can be “hot-swapped” (safely removed or swapped without shutting down the UPS).
  • For Power Outages: UPS Protects against all types of power problems including blackouts, brownouts, surges and line noise. In the event of a power outage, the UPS immediately activates without interruption. The UPS keeps your FFU running long enough to either: (1) safely store away contamination-sensitive materials and works-in-progress before shutting down operations, or (2) switch to a back-up power generator.
  • For Mobile Applications: Use the UPS to create a mobile battery-powered cleanroom on wheels to safely transport sterile materials through a dirty space. The UPS provides adequate time to transfer out of one cleanroom and relocate to another cleanroom in a different part of the facility. With the FFU mounted on top of the cabinet, the battery-powered system supplies uniform HEPA-filtered air flow to prevent airborne contamination while moving the cabinet through a dirty environment. Once the cart arrives at its destination, simply plug the system back into a wall outlet to recharge the batteries.
  • Smart® EC FFU:
  • 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 and low noise levels (40 dB).
  • MODBUS® networking control card with closed-loop control capability 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 minimizes leaks for improved efficiency. It is also food-grade and resistant to a wide variety of chemicals and environments for a long service life.
  • Internal baffling plate and diffuser panel provide quiet uniform air flow across the filter face.
  • Filters are leak tested in accordance with IEST standards and meet UL 900.
  • Includes MERV 7 pre-filter to extend service life of HEPA filter.
  • See performance data and submittal sheets for additional information.
  • Optional Accessories: challenge port kit, power plug adapter, replacement filter, filter replacement alarm, ionizing bar, pre-filter safety cover for CE conformance.
  • All filter sales are final; returns for this item cannot be accepted.

Type: Smart® ECM

Material: Powder-Coated Steel

Filter Replacement Access: Top Side

Size: 2'x4'

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: 7.1 ft²

Pre-Filter: MERV 7

Unit of Measure: EA

Marks & Listings: CE, UL, ULC

Electrical Specifications: 120/230 V, 4.128 A, 1 Ph, 50/60 Hz

Weight, Product: 130 lb

Dimensions, Product: 23.63" W x 47.63" D x 16.5" H

Weight, Shipping: 170 lb

Dimensions, Shipping: 51" W x 25" D x 20" H

Package Type: Palletized

Manuals & Resources
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  1. Provides a stream of static-neutralizing ions to protect ESD-sensitive components.
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  2. Holds fan filter units secure in ceilings without grid. | 6604-01 displayed
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  3. Simplifies filter leak testing and connection of Filter Backpressure Alarm | 6601-99 displayed
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  4. Cable Extension, PVC, 4 Poles, 5M, 22awg, 300V, straight male to straight female with close-up | 6601-39 displayed
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  5. Safety Cover Aluminum For CE Applications | 6601-15 displayed
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  6. FFU Testing and Certification; Flow Rate and Filter integrity
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  7. FasTrak 24-7 Expediting Service
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  8. High Efficiency Particle Filter is rated 99.99% efficient @ 0.3 µm diameter particles | 6601-25 displayed
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  9. MERV 7 pre-filter for Terra Fan Filter Units (FFUs) | 6601-34 displayed
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  10. Uninterruptible Power Supply (UPS) mounted on top of FFU; main UPS unit plus add-on battery for extended runtime; status indicator lights provide visual alerts | 6601-24A-H-EC-BP displayed
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  11. High Efficiency Particle Filter is rated 99.99% efficient @ 0.3 µm diameter particles | 6601-25 displayed
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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.

Fan Filter Unit with External UPS Battery System

Uninterruptible Power Supply (UPS) system provides backup battery power supply to keep critical equipment running without interruption when utility power supply is unavailable. The separate system can be retrofitted to an existing 2’x4’ FFU. Stainless steel model available.

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.

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).

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.

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.

Main UPS Battery Tower for FFU, 120V

Main UPS tower provides power to the Fan Filter Unit and switches to battery power when AC power is disconnected.

Add-On 24V Battery Pack for UPS Battery System

External 24V battery pack offers extended battery runtime when used with main tower UPS system.

Catalog of CE-Marked Products

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

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