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All-SS Room-Side Replaceable WhisperFlow® Fan Filter Unit allows fast filter servicing without a cleanroom shut-down; all-stainless steel construction
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Base Part # 6601-22A-URSS

Fan Filter Unit; WhisperFlow®, RSR, 2'x2', ULPA, 120 V, Stainless Steel, BioSafe®

Terra Part #: 6601-22A-URSS
Manufactured By: Terra Universal
Warranty: 1 year parts, 90 days labor
LTL freight shipment. Dock or liftgate may be required.
  • Available Certified ISO Grade Designs: ISO 5, ISO 6, ISO 7, ISO 8

• Type: WhisperFlow®, RSR

• Material: Stainless Steel

• Filter Replacement Access: Room-Side

• Size: 2'x2'

• 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: 3.5 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 ISO 5 Icon Quick Ship +
Terra Part #: 6601-22A-URSS
Manufactured By: Terra Universal
Warranty: 1 year parts, 90 days labor
LTL freight shipment. Dock or liftgate may be required.
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System Summary
Fan Filter Unit; WhisperFlow®, RSR, 2'x2', ULPA, 120 V, Stainless Steel, BioSafe®
Fan Filter Unit; WhisperFlow®, RSR, 2'x2', ULPA, 120 V, Stainless Steel, BioSafe®

In stock

$2,813 / system Estimated Total: Tax calculated at checkout $2,813 *

*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
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Selected Items
    Customize Fan Filter Unit; WhisperFlow®, RSR, 2'x2', 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®, RSR, 2'x2', ULPA, 120 V, Stainless Steel, BioSafe®
    Fan Filter Unit; WhisperFlow®, RSR, 2'x2', ULPA, 120 V, Stainless Steel, BioSafe® 6601-22A-URSS Quick Ship+ Available 1 required Only 9 left in stock
    $2,717
    Increase Down Increase Up
    Filter; ULPA, 2'x2', 304 Stainless Steel, Rated 99.999% efficient
    Filter; ULPA, 2'x2', 304 Stainless Steel, Rated 99.999% efficient Quick Ship+ Available In stock
    $1,048
    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 306 in stock
    $187
    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 14 in stock
    $499
    Increase Down Increase Up
    Carbon Pre-Filters for FFUs; Replacements, 4 Pack, 19.5
    Carbon Pre-Filters for FFUs; Replacements, 4 Pack, 19.5" x 19.5" x 7/8" thk. 11 in stock
    $187
    Increase Down Increase Up
    Carbon Pre-Filters for FFUs; Replacements, 12 Pack, 19.5
    Carbon Pre-Filters for FFUs; Replacements, 12 Pack, 19.5" x 19.5" x 7/8" thk.
    $499
    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
    Filter; ULPA, RSR, 2'x2', 304 Stainless Steel, Rated 99.999% efficient, for Roomside Replaceable FFU, Roomside Challenge Port
    Filter; ULPA, RSR, 2'x2', 304 Stainless Steel, Rated 99.999% efficient, for Roomside Replaceable FFU, Roomside Challenge Port Only 8 left in stock
    $943
    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
    $237
    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 129 in stock
    $164
    Increase Down Increase Up
    Remove

    Accessories

    Optional add-ons designed to enhance your system
    Eyebolts, 1/4
    Eyebolts, 1/4" - 20 thread, for FFU, 4 pack Quick Ship+ Available 59 in stock
    $24
    Increase Down Increase Up
    CleanWatch+® Differential Particle Counter
    CleanWatch+® Differential Particle Counter In stock soon
    $2,598
    Increase Down Increase Up
    Universal™ Filter Replacement Alarm System with PLC; for Fan Filter Units, Email, Audible, & Visible Alert, Manual Override, Stainless Steel, 120 V
    Universal™ Filter Replacement Alarm System with PLC; for Fan Filter Units, Email, Audible, & Visible Alert, Manual Override, Stainless Steel, 120 V Quick Ship+ Available Only 5 left in stock
    $985
    Increase Down Increase Up
    Challenge Port, Kit; for Fan/Filter Unit
    Challenge Port, Kit; for Fan/Filter Unit 6601-99 1 required In stock
    $96
    Increase Down Increase Up

    Services

    Select services to request details and quotes.
    ISO Rated FFU Testing and Certification; Leak-Tested
    ISO Rated FFU Testing and Certification; Leak-Tested
    Custom-configured product. Contact Terra by phone, chat or email for a project-specific quote.
    Request Quote
    Service, ISO Grade Certificate, ISO 5
    Service, ISO Grade Certificate, ISO 5
    Request Quote
    Filter Integrity and Performance Certification
    Filter Integrity and Performance Certification
    Custom-configured product. Contact Terra by phone, chat or email for a project-specific quote.
    Request Quote
    Warranty; 2 Year, Fan Filter Units, Parts
    Warranty; 2 Year, Fan Filter Units, Parts
    Custom-configured product. Contact Terra by phone, chat or email for a project-specific quote.
    Request Quote
    UL Listing Declaration for Fan/Filter Units
    UL Listing Declaration for Fan/Filter Units
    Request Quote
    Sealed Filter Frame Upgrade for FFUs
    Sealed Filter Frame Upgrade for FFUs
    Custom-configured product. Contact Terra by phone, chat or email for a project-specific quote.
    Request Quote

    * Required Fields

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    Buy Accessories
    1. ULPA Replacement Filter for FFU, with durable stainless steel frame to improve corrosion resistance | 6601-28-S displayed
      Filter; ULPA, 2'x2', 304 Stainless Steel, Rated 99.999% efficient
      $1,048
      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.
      $187
      Usually Ships in 1 - 3 days
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    6. 500 lbs capacity on each side of fan filter unit
      Upgrade FFU to Walkable Design
      Request Quote
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    7. Roomside replaceable challenge port filter provides an optimized method for filter leak testing
      Filter; ULPA, RSR, 2'x2', 304 Stainless Steel, Rated 99.999% efficient, for Roomside Replaceable FFU, Roomside Challenge Port
      $943
      Usually Ships in 1 - 3 days
    8. FFU Connect pack includes flexible ducting and all hardware required to connect and seal the duct. | 6601-01 displayed
      FFU Connect Pack for Cleanrooms, 12" Dia. x 25'L Insulated Ducting
      $237
      Usually Ships in 5 - 5 days
    9. 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
      $164
      Usually Ships in 1 - 3 days
    10. Eyebolt with 1/4"-20 thread for lifting FFUs | 6601-02 displayed
      Eyebolts, 1/4" - 20 thread, for FFU, 4 pack
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      CleanWatch+® Differential Particle Counter
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      $985
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      Request Quote
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      Service, ISO Grade Certificate, ISO 5
      Request Quote
      Usually Ships in 5 - 9 days
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      Filter Integrity and Performance Certification
      Request Quote
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      Warranty; 2 Year, Fan Filter Units, Parts
      Request Quote
    17. UL Listing Declaration for Fan/Filter Units
      UL Listing Declaration for Fan/Filter Units
      Request Quote
      Usually Ships in 5 - 9 days
    18. Add-on design upgrade to have welded filter frames for USP 797 / 800 applications. | 9999-WF displayed
      Sealed Filter Frame Upgrade for FFUs
      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.