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Stainless Steel WhisperFlow® Fan Filter Unit includes 99.995% efficient ULPA filter for ISO 3 compliance | 6601-23-HSS displayed
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Fan Filter Unit; WhisperFlow, 2'x3', ULPA, 120 V, Stainless Steel, BioSafe®

  • Available Certified ISO Grade Designs: ISO 5, ISO 6, ISO 7, ISO 8

• Type: WhisperFlow

• Material: Stainless Steel

• Filter Replacement Access: Top Side

• Size: 2'x3'

• Filter Frame Material: 304 Stainless Steel

• Filter: ULPA

• Motor Type: Permanent Split capacitor (PSC)

• Motor HP: 1/4 hp

• Airflow: Positive Pressure

• Speed Control: 3-Speed Switch

• Blower Type: Forward Curved

• Active Filter Face Area: 5.2 ft²

• Pre-Filter: MERV 7

• Certified ISO Grade Design: ISO 5

• ISO Rated Air Cleanliness: ISO 4

• RoHS: Compliant

• Unit of Measure: EA

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Stocked ULus Listed WhisperFlow BioSafe classic logo Quick Ship +
Terra Part #: 6601-23-USS
Manufactured By: Terra Universal
Warranty: 1 year parts, 90 days labor
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6601-23-USS
Terra Part # 6601-23-USS
$2,287
Usually ships in 0-2 business days

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62717
Fan Filter Unit; WhisperFlow, 2'x3', ULPA, 120 V, Stainless Steel, BioSafe®
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Product Details
  • Available Certified ISO Grade Designs: ISO 5, ISO 6, ISO 7, ISO 8
  • Ultra-Low Particulate Air (ULPA) Filter: 99.999% efficient at 0.12µm particle diameter
  • All-304 stainless steel BioSafe® housing, baffle plate, filter face grille, filter frame and impeller ensure optimal cleanliness and stand up to alcohol and other cleaning agents
  • AC 3-speed blower motor
  • 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
Show more

• Type: WhisperFlow

• Material: Stainless Steel

• Filter Replacement Access: Top Side

• Size: 2'x3'

• Filter Frame Material: 304 Stainless Steel

• Filter: ULPA

• Motor Type: Permanent Split capacitor (PSC)

• Motor HP: 1/4 hp

• Airflow: Positive Pressure

• Speed Control: 3-Speed Switch

• Blower Type: Forward Curved

• Active Filter Face Area: 5.2 ft²

• Pre-Filter: MERV 7

• Certified ISO Grade Design: ISO 5

• ISO Rated Air Cleanliness: ISO 4

• RoHS: Compliant

• Unit of Measure: EA

• Marks & Listings: UL, ULC

• Electrical Specifications: 120 V, 3.8 A, 1 Ph, 60 Hz

• Weight, Product: 53 lb

• Dimensions, Product: 23.63"W x 35.63"D x 13"H

• Weight, Shipping: 73 lb

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

• Package Type: Palletized

Show more
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Fan Filter Units

  • Terra Universal WhisperFlow® Filter Fan Units Terra Universal WhisperFlow® Filter Fan Units
  • Portable HEPA Filtration System Watch Terra's Portable HEPA Filtration System Video
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
Portable HEPA Filtration System
Terra's in stock portable HEPA filtration systems provide high quality and medical grade air filtration for your ambient environment. Watch Terra's Portable HEPA Filtration System Video The mobile/ self contained filtration system converts to any room to a negative pressure isolation room which then makes it well suited for medical clinics, schools, waiting rooms and other confined areas.

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.

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.

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.

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).

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).

Wide Selection of Global Shipping Options

Terra offers a broad range of global shipping services including door-to-door and white glove delivery. Each product is safely packaged in a heat-treated wooden crate that meets international shipping standards.

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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