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WhisperFlow™ Stainless Steel ULPA Fan Filter Unit captures 99.995% of 0.12-µm particles; stainless steel housing and filter frame | 6601-24-USS displayed
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Base Part # 6601-24-USS

Fan Filter Unit; WhisperFlow®, 2'x4', 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'x4'

• 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: 7.1 ft²

• Pre-Filter: MERV 7

• Certified ISO Grade Design: ISO 5

• ISO Rated Air Cleanliness: ISO 4

• RoHS: Compliant

• Unit of Measure: EA

Read more
Stocked ULus Listed WhisperFlow BioSafe classic logo ISO 4 Icon Quick Ship +
Terra Part #: 6601-24-USS
Manufactured By: Terra Universal
Warranty: 1 year parts, 90 days labor
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System Summary
Fan Filter Unit; WhisperFlow®, 2'x4', ULPA, 120 V, Stainless Steel, BioSafe®
Fan Filter Unit; WhisperFlow®, 2'x4', ULPA, 120 V, Stainless Steel, BioSafe®

In stock

$3,639 / system Estimated Total: Tax calculated at checkout $3,639 *

*includes web discount for online orders Web-exclusive discount applies only to quotes/orders placed directly on our website; not valid for phone, email, or other ordering methods.
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Quick Ship+ Available
Usually ships in 1-3 business days
Want it faster? Read about FasTrak
Selected Items
    Customize Fan Filter Unit; WhisperFlow®, 2'x4', ULPA, 120 V, Stainless Steel, BioSafe®
    Replacement HEPA and ULPA Filters

    Replacement Filters

    To avoid shutdowns, order replacement filters at time of Fan/Filter Unit purchase
    Fan Filter Unit; WhisperFlow®, 2'x4', ULPA, 120 V, Stainless Steel, BioSafe®
    Fan Filter Unit; WhisperFlow®, 2'x4', ULPA, 120 V, Stainless Steel, BioSafe® 6601-24-USS Quick Ship+ Available 1 required Only 2 left in stock
    $1,859
    Increase Down Increase Up
    Filter; ULPA, 2'x4', 304 Stainless Steel, Rated 99.999% efficient
    Filter; ULPA, 2'x4', 304 Stainless Steel, Rated 99.999% efficient Quick Ship+ Available In stock
    $1,102
    Increase Down Increase Up
    MERV 7 Pre-Filters for FFUs; Replacements, 4 Pack, 19.5
    MERV 7 Pre-Filters for FFUs; Replacements, 4 Pack, 19.5" x 19.5" x 7/8 thk. Quick Ship+ Available 377 in stock
    $175
    Increase Down Increase Up
    MERV 7 Pre-Filters for FFUs; Replacements, 12 Pack, 19.5
    MERV 7 Pre-Filters for FFUs; Replacements, 12 Pack, 19.5" x 19.5" x 7/8 thk. Quick Ship+ Available 30 in stock
    $466
    Increase Down Increase Up

    Design

    Select optional design modifications. Unavailable for items from stock.
    Upgrade FFU to Walkable Design
    Upgrade FFU to Walkable Design
    Custom-configured product. Contact Terra by phone, chat or email for a project-specific quote.
    Request Quote
    Ionizing Bar End

    Ionizing Equipment

    Provide a continuous stream of static neutralizing ions to protect sensitive materials against ESD.
    Ion Bar, 44
    Ion Bar, 44", 8 Emitters, Uninstalled, 120 V Quick Ship+ Available In stock
    $997
    Increase Down Increase Up
    System Integration Fee, Class D
    System Integration Fee, Class D 9998-IntegrationD
    Custom-configured product. Contact Terra by phone, chat or email for a project-specific quote.
    Request Quote
    Ion Bar Installation Kit For Cleanrooms/FFUs
    Ion Bar Installation Kit For Cleanrooms/FFUs 2005-91 Quick Ship+ Available 1 required In stock
    $84
    Increase Down Increase Up
    Transformer, 120V, 60Hz, for Ionbar or Ionizing Air Gun
    Transformer, 120V, 60Hz, for Ionbar or Ionizing Air Gun 2005-09A Quick Ship+ Available 1 required In stock
    $57
    Increase Down Increase Up
    Power Cable, 8-ft. for Ionizing Bar
    Power Cable, 8-ft. for Ionizing Bar 2005-27 Quick Ship+ Available 1 required In stock
    $21
    Increase Down Increase Up

    Accessories

    Optional add-ons designed to enhance your system
    Cord Adapter, MIN4 PL to 16AWG Power Cord for Terra Fan/Filter Unit, 300V, 10A
    Cord Adapter, MIN4 PL to 16AWG Power Cord for Terra Fan/Filter Unit, 300V, 10A Quick Ship+ Available In stock
    $64
    Increase Down Increase Up
    Challenge Port, Kit; for Fan/Filter Unit
    Challenge Port, Kit; for Fan/Filter Unit In stock
    $89
    Increase Down Increase Up
    Module, UV-C Sanitizing; Residential Air Treatment System; 120V, 1.1A, 60Hz
    Module, UV-C Sanitizing; Residential Air Treatment System; 120V, 1.1A, 60Hz In stock
    $230
    Increase Down Increase Up
    Adapter, Vapor-Removal, Powder-Coated Steel, 20
    Adapter, Vapor-Removal, Powder-Coated Steel, 20"W x 20.25"D x 7.625"H; for Fan Filter Units 6602-30A Quick Ship+ Available 1 required 12 in stock
    $708
    Increase Down Increase Up
    Charcoal Cartridge for FFU Vapor-Removal Adapter
    Charcoal Cartridge for FFU Vapor-Removal Adapter 6602-35A 1 required In stock
    $222
    Increase Down Increase Up
    Photo-Catalytic Oxidation Panel, for FFU Vapor-Removal Adapter
    Photo-Catalytic Oxidation Panel, for FFU Vapor-Removal Adapter 6602-36 1 required In stock
    $688
    Increase Down Increase Up
    Eyebolts, 1/4
    Eyebolts, 1/4" - 20 thread, for FFU, 4 pack Quick Ship+ Available 169 in stock
    $23
    Increase Down Increase Up

    Ducting Accessories

    Ducting accessories for HVAC units
    None
    Remove
    FFU Connect Pack for Cleanrooms, 12
    FFU Connect Pack for Cleanrooms, 12" Dia. x 25'L Insulated Ducting In stock
    $222
    Increase Down Increase Up
    Remove
    Duct Flange Adapter for standard FFUs; 12
    Duct Flange Adapter for standard FFUs; 12" dia, 19.5" W x 19.5" D x 2" H, galvanized steel Quick Ship+ Available 191 in stock
    $153
    Increase Down Increase Up
    Remove

    Services

    Select services to request details and quotes.
    Service, ISO Grade Certificate, ISO 5
    Service, ISO Grade Certificate, ISO 5
    Request Quote
    ISO Rated FFU Testing and Certification; Flow Rate and Filter integrity
    ISO Rated FFU Testing and Certification; Flow Rate and Filter integrity
    Custom-configured product. Contact Terra by phone, chat or email for a project-specific quote.
    Request Quote
    Warranty; 5 Year, Fan Filter Units, Parts
    Warranty; 5 Year, Fan Filter Units, Parts
    Custom-configured product. Contact Terra by phone, chat or email for a project-specific quote.
    Request Quote

    * Required Fields

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      ISO Rated FFU Testing and Certification; Flow Rate and Filter integrity
      Request Quote
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    1. ULPA Replacement Filter for FFU, with durable stainless steel frame to improve corrosion resistance | 6601-28-S displayed
      Filter; ULPA, 2'x4', 304 Stainless Steel, Rated 99.999% efficient
      $1,102
      Usually Ships in 1 - 3 days
    2. MERV 7 pre-filter for Terra Fan Filter Units (FFUs)), 4 pack | 6601-34 displayed
      MERV 7 Pre-Filters for FFUs; Replacements, 4 Pack, 19.5" x 19.5" x 7/8 thk.
      $175
      Usually Ships in 1 - 3 days
    3. MERV 7 pre-filter for Terra Fan Filter Units (FFUs)), 12 pack | 6603-84 displayed
      MERV 7 Pre-Filters for FFUs; Replacements, 12 Pack, 19.5" x 19.5" x 7/8 thk.
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      Upgrade FFU to Walkable Design
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      Ion Bar, 44", 8 Emitters, Uninstalled, 120 V
      $997
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    6. Four-pin power cord adapter for fan/filter unit allows connection to standard 120VAC/60Hz power receptacle | 6601-13 displayed
      Cord Adapter, MIN4 PL to 16AWG Power Cord for Terra Fan/Filter Unit, 300V, 10A
      $64
      Usually Ships in 0 - 2 days
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      Challenge Port, Kit; for Fan/Filter Unit
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      Eyebolts, 1/4" - 20 thread, for FFU, 4 pack
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      FFU Connect Pack for Cleanrooms, 12" Dia. x 25'L Insulated Ducting
      $222
      Usually Ships in 5 - 5 days
    11. Galvanized steel flange adapter mounts to standard FFUs for sealed duct connections and long-term cleanroom airflow performance | 6601-03 displayed
      Duct Flange Adapter for standard FFUs; 12" dia, 19.5" W x 19.5" D x 2" H, galvanized steel
      $153
      Usually Ships in 1 - 3 days
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      Usually Ships in 5 - 9 days
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      ISO Rated FFU Testing and Certification; Flow Rate and Filter integrity
      Request Quote
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      Warranty; 5 Year, Fan Filter Units, Parts
      Request Quote

    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.