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Terra Part # Price Ships in
2'x2' ULPA Perforated Stainless Steel 6601-30-S 60771 $1,025 1-3 Days 2
Quick Ship+ Available 134 in stock
2'x3' ULPA Perforated Stainless Steel 6601-29-S 60770 $1,256 1-3 Days 3
Quick Ship+ Available 124 in stock
2'x4' ULPA Perforated Stainless Steel 6601-28-S 60769 $1,152 1-3 Days 4
Quick Ship+ Available 306 in stock
16" x 24" ULPA Perforated Stainless Steel 6601-43-S 70389 $912 1-3 Days 5
Quick Ship+ Available 25 in stock
16" x 36" ULPA Perforated Stainless Steel 6601-32-S 70392 $1,082 1-3 Days 6
Quick Ship+ Available 25 in stock
16" x 48" ULPA Perforated Stainless Steel 6601-33-S 70393 $1,157 1-3 Days 7
Quick Ship+ Available 25 in stock
Filter Type
Screen Type
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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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Usually Ships in:
Free shipping in contiguous USA
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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Product Details
Product Details
  • Available ISO Ratings: ISO 4, ISO 5, ISO 6, ISO 7, ISO 8
  • 99.9995% efficient at filtering particles down to 0.1 micrometers
  • Features a durable and corrosion resistant 304 stainless steel frame for stringent cleanliness requirements
  • Compatible with all industry-standard FFU brands in 2' x 2', 2' x 3' and 2' x 4' sizes
  • Certified and tested to UL 900 for fire safety
  • Designed to capture microscopic pathogens and particles.
  • Remove an extremely wide variety of contaminants from the air, including particles smaller than a micron.
  • Large quantities in-stock and packaged for immediate shipment.
  • Because filters are delicate and subject to damage during handling, all filter sales are final; no failure claims can be accepted.

Marks & Listings: UL

Fan Filter Units With HEPA & ULPA Filters

  • HEPA filters prevent infections HEPA Filters Prevent Infection
  • Terra Universal WhisperFlow® Filter Fan Units Terra Universal WhisperFlow® Filter Fan Units
HEPA filters prevent infections
Terra Universal WhisperFlow® Filter Fan Units
Features & Benefits

Features and Benefits

Products Compliant With Your ISO Rating

Provide Terra with your desired ISO rating. We will tailor the product to meet your rating and supply a certificate of compliance appended to your invoice, to be included in your compliance package. All certificates are archived in Terra's system for quick retrieval.

UL 900 Certified for Fire Safety

HEPA and ULPA filters are UL certified for UL 900 to meet local and state fire safety requirements for most applications. The standard covers requirements and tests for allowable combustibility and amount of smoke generated.

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.

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

Long Running FFU Motors

Terra’s filter fan unit motors are rated for 5 years of continuous, 24/7 operation, if the HEPA filters are consistently replaced. To accurately monitor your HEPA filter’s saturation levels, purchase Terra’s audible and visual filter replacement alarm system.
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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.