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2' x 4' aluminum fan filter unit with HEPA filter and energy-efficient, smart EC motor with network connection for cleanrooms | 6601-24-H-EC-CF displayed
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Fan Filter Unit; Aluminum, 2'x4', HEPA, EC Motor, Constant Flow, RSR, Room-Side Replaceable, 115 V

Warranty: 1 year parts, 90 days labor
  • Available Certified ISO Grade Designs: ISO 7, ISO 8
  • Constant airflow design dynamically adjusts for changes in static pressure, filter load, and other conditions to maintain set airflow
  • Electrically commutated (EC), high-efficiency motor regulates torque and speed to provide consistent air volume
  • EC motor shows high performance at low energy requirements at only 110 watts at average speed
  • Internal baffling plates and diffuser panel provide uniform air speed across the filter face, ensuring laminar airflow
  • Roomside replacement with gel seal filter element; filter is replaceable from below the ceiling

• Type: Constant Flow, RSR

• Material: Aluminum

• Filter Replacement Access: Room-Side

• Size: 2'x4'

• Filter Frame Material: Aluminum

• Filter Type: HEPA, RSR

• Filter: HEPA

• Motor Type: Electronically Commutated (EC)

• Airflow: Positive Pressure

• Speed Control: Universal Control Card

• Blower Type: Forward Curved

• Active Filter Face Area: 5.3 ft²

• FFU Control: Automatic

• Unit of Measure: EA

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Warranty: 1 year parts, 90 days labor
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6601-24-HR-EC-CF
Terra Part # 6601-24-HR-EC-CF
$2,791
Accessories related to Terra Part # 6601-24-HR-EC-CF
85556
Fan Filter Unit; Aluminum, 2'x4', HEPA, EC Motor, Constant Flow, RSR, Room-Side Replaceable, 115 V
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Product Details
  • Available Certified ISO Grade Designs: ISO 7, ISO 8
  • Constant airflow design dynamically adjusts for changes in static pressure, filter load, and other conditions to maintain set airflow
  • Electrically commutated (EC), high-efficiency motor regulates torque and speed to provide consistent air volume
  • EC motor shows high performance at low energy requirements at only 110 watts at average speed
  • Internal baffling plates and diffuser panel provide uniform air speed across the filter face, ensuring laminar airflow
  • Roomside replacement with gel seal filter element; filter is replaceable from below the ceiling
  • Finger guard-protected inlet to protect users and the equipment
  • 1/4" ( 6 mm) -20 threaded holes in top corners accommodate eyebolts to facilitate installation using suspended guy wires (order eye bolt package separately)
  • Mill finished aluminum exterior
  • Challenge port included
  • HEPA Filter: 99.99% efficient High-Efficiency Particulate Air, rated at particles 0.3µm diameter
  • Universal Control card, 3 modes available:
  •           Network mode – MODBUS RTU with RJ45 serial bus connection
  •           Analog model – 0 -10 VDC input
  •           Onboard Trim pot adjustment
  • Sound level is approximately 48 dBA, at average air flow velocity of 90 FPM (0.46 m/s)
  • Walkable plenum (excluding pre-filter) rated to 250 lbs.
  • Replacement filter (order separately)
  • Snap-in washable MERV 4 pre-filter
  • Because filters are delicate and subject to damage during handling, all filter sales are final; no failure claims can be accepted

• Type: Constant Flow, RSR

• Material: Aluminum

• Filter Replacement Access: Room-Side

• Size: 2'x4'

• Filter Frame Material: Aluminum

• Filter Type: HEPA, RSR

• Filter: HEPA

• Motor Type: Electronically Commutated (EC)

• Airflow: Positive Pressure

• Speed Control: Universal Control Card

• Blower Type: Forward Curved

• Active Filter Face Area: 5.3 ft²

• FFU Control: Automatic

• Unit of Measure: EA

• Marks & Listings: UL, ULC

• Electrical Specifications: 115 V, 5 A, 225 W, 1 Ph, 60 Hz

• Weight, Product: 71 lb

• Dimensions, Product: 23.63" W x 47.63" D x 16.42" H

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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
Overview video of Terra Universal's comprehensive portfolio of filter fan units Terra Universal WhisperFlow® Filter Fan Units Overview video of Terra Universal's comprehensive portfolio of filter fan units

Features and Benefits

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
Popular Accessories
For a full list of accessories, select a product then click Choose Accessories on that product page.
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    Fan Filter Unit Control System

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    Night Service Saves Energy, Extends Filter Life!

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    Filter Replacement Alarm

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