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Activated carbon filter Fan/Filter Units come with chemical adsorbing air-scrubbing carbon filters in place of HEPA filters | 6601-PP-72 displayed
Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan Filter Units,Fan/Filter Units
Product Group:
6601-PP-72
6601-PP-72

Activated Carbon Fan Filter Units

Manufactured By: Terra Universal
  • Available Certified ISO Grade Designs: ISO 6, ISO 7, ISO 8
  • Suitable for industries requiring frequent use of solvents and volatile organic compounds (VOCs)
  • Honeycomb activated carbon-equipped fan/filter unit (FFU) specialized for containing gaseous contaminants
  • Gas-phase filtration absorbs gaseous material at the molecular level too small for HEPA filters to capture
  • Activated carbon filters capture common odor-causing substances including ammonia, hydrogen sulfide, ozone
  • 2'x4' filters adsorb up to 7.5lbs (3.4kg) of VOCs; 2'x2' filters adsorb up to 3.7lbs (1.7kg) of VOCs

• Filter: Activated Carbon

• Certified ISO Grade Design: ISO 6

• ISO Rated Air Cleanliness: ISO 5

• Unit of Measure: of 1

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Stocked WhisperFlow ISO 6 Icon
Manufactured By: Terra Universal
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 Terra Part #Price Ships in
120 V Stainless Steel Reverse-Flow 1'x1' Activated Carbon 6601-11-CV $1,709 5-11 Days2
120 V Stainless Steel WhisperFlow® 1'x1' Activated Carbon 6601-11-C $1,709 5-11 Days3
120 V Powder-Coated Steel Reverse-Flow 2'x2' Activated Carbon 6601-22-CV $908 5-11 Days4
120 V Powder-Coated Steel Reverse-Flow 2'x4' Activated Carbon 6601-24-CV $908 5-11 Days5
120 V Powder-Coated Steel WhisperFlow® 2'x2' Activated Carbon 6601-22-C $758 5-11 Days6
120 V Powder-Coated Steel WhisperFlow® 2'x4' Activated Carbon 6601-24-C $758 5-11 Days7
None Powder-Coated Steel Ducted 2'x2' Activated Carbon 6601-22-CD $540 5-9 Days8
None Powder-Coated Steel Ducted 2'x4' Activated Carbon 6601-24-CD $581 1-3 Days9
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Up to 30-day trial periods, free return shipping and on-site training available for qualified equipment.

Request demo from your product specialist or add note to your order or quote request.

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*See discounts and promos in cart Web-exclusive discount applies only to quotes/orders placed directly on our website; not valid for phone, email, or other ordering methods.
*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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Custom-configured product. Contact Terra by phone, chat or email for a project-specific quote.
Custom-configured product. Contact Terra by phone, chat or email for a project-specific quote.
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Features & Benefits
Available Accessories
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Product Details
Product Details
  • Available Certified ISO Grade Designs: ISO 6, ISO 7, ISO 8
  • Suitable for industries requiring frequent use of solvents and volatile organic compounds (VOCs)
  • Honeycomb activated carbon-equipped fan/filter unit (FFU) specialized for containing gaseous contaminants
  • Gas-phase filtration absorbs gaseous material at the molecular level too small for HEPA filters to capture
  • Activated carbon filters capture common odor-causing substances including ammonia, hydrogen sulfide, ozone
  • 2'x4' filters adsorb up to 7.5lbs (3.4kg) of VOCs; 2'x2' filters adsorb up to 3.7lbs (1.7kg) of VOCs
  • Quiet, low vibration carbon filter system; only 43 dBA measured 30 in. from unit minimizes distracting background noises
  • Uses a lightweight, forward-curved fan powered by a 120V 60Hz motor
  • Variable speed dial simplifies air balancing
  • Internal baffling plate and diffuser panel provide quiet, uniform air flow across the filter face
  • Low-profile design is ideal for cleanrooms with limited ceiling space
  • FDA-approved silicone sealant without harmful chemicals seals inside housing to prevent air leakage (specify acrylic urethane or other required sealant type when FFU is ordered).
  • 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)
  • Activated Honeycomb Carbon:
  • Provides effective odor control and particle filtration in critical environments.
  • Made from high-quality, virgin coconut shell for superior pore size distribution and maximum adsorption capacity.
  • Effectively removes volatile organic compounds (VOCs) like carbon tetrachloride, trichloroethane, and ethylbenzene.
  • Designed for high performance and low particulate shedding, these bonded carbon panels eliminate the need for downstream filters, unlike loose-fill carbon trays or disposable honeycomb filters.
  • Suited for HVAC systems in critical environments.
  • All filter sales are final; returns for this item cannot be accepted

• Filter: Activated Carbon

• Certified ISO Grade Design: ISO 6

• ISO Rated Air Cleanliness: ISO 5

• Unit of Measure: of 1

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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 & Benefits

Features and Benefits

Stainless Steel Frame, Grille, and Mesh

Carbon filter features a sanitary, sterile stainless steel frame and grille contain compressed activated carbon media with the aid of a fine mesh

VOC-Adsorbing Activated Honeycomb Carbon Filter Media

High quality compressed activated honeycomb carbon features a low wind resistance and strong adsorption capacity to filter fumes, odors, and other contaminants.

High Throughput Activated Carbon Channel Grid

Honeycomb carbon media structure creates high efficency adsorpiton without sacrificing airflow due to constrictive fiber meshes.

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).

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.

Products Compliant With Your ISO Rating

High-capacity, durable, ISO-compliant system rated for thousands of operating hours.
Available Accessories
Popular Accessories
For a full list of accessories, select a product then click Choose Accessories on that product page.
  • Ionizing Bar Installed on Cleanroom Fan/Filter Unit

    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.
  • Fan Filter Unit Power Cord Adapter

    Cord Adapter, MIN4 PL to 16AWG Power Cord for Terra Fan/Filter Unit

    Four-pin power cord adapter for fan/filter unit allows connection to standard 120VAC/60Hz power receptacle.
  • 2’x2’ replacement filter for roomside replaceable (RSR) Fan Filter Unit (FFU), inside view
    Learn More

    Replacement Filters

    Purchase replacement filters ahead of time to prevent costly operational interruptions and avoid damage to fan blowers caused by excessive backpressure from long overdue filter replacements.
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Manuals & Resources
Manuals & Resources

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.