Terra Part # 6601-22-UEVSS
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Accessories related to Terra Part # 6601-22-UEVSS
Fan Filter Unit; Explosion-Proof, Reverse-Flow, 2'x2', ULPA, 120 V, Stainless Steel, WhisperFlow, BioSafe®
Product Details
  • Available ISO Ratings: ISO 4, ISO 5, ISO 6, ISO 7, ISO 8
  • Exhaust flow fan filter unit convert any room into a negative pressure isolation/containment room
  • Explosion-proof FFU meets NEC requirements for Class I/Class II, Division 1 Hazardous locations
  • Non-sparking motor, mounted in a cast-iron, explosion-proof housing
  • Mounts into ceiling bay to remove sub-micron particles and provide safe exhaust
  • Explosion-Proof Design:
  • Explosion-proof motor meets NEC requirement for Class I Group C and D, Class II Group F and G, Division 1 hazardous locations.
  • All wiring embedded in filled, rigid conduit in accordance with Class I/II requirements.
  • NOTE: Proper installation of explosion proof equipment is critical to maintaining the explosion-proof protection aspects of the system. Customer must hard wire the motor/ffu in correlation to their specified voltage at time of installation. Therefore all wiring for explosion proof systems should be done in the field per local code by a licensed electrician.
  • FFU Design:
  • All-304 stainless steel BioSafe® housing, baffle plate, filter face grille, and filter frame ensure optimal cleanliness and stand up to alcohol and other cleaning agents.
  • Internal baffling plate and diffuser panel provide quiet uniform air flow across the filter face.
  • 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).
  • ULPA Filter: 99.999% efficient Ultra-Low Penetration Air, rated at particles 0.12µm diameter, shipped uninstalled to prevent damage during shipping.
  • Medical grade filters are leak tested in accordance with IEST standards and meet UL 900.
  • See performance data and submittal sheets for additional information.
  • NOTE: Because filters are delicate and subject to damage during handling, all filter sales are final; no returns can be accepted.
  • Optional Accessories:
  • Stainless steel surface mount frame for installing FFU in ceiling without T-grid.
  • Replacement filters.
  • Includes:
  • (1) MERV 7 filter (30% ASHRAE rated), 19.5" x 19.5" x 7/8" thk.

Type: Explosion-Proof, Reverse-Flow

Material: Stainless Steel

Filter Replacement Access: Top Side

Size: 2'x2'

Filter Frame Material: 304 Stainless Steel

Filter: ULPA

Motor Type: Permanent Split capacitor (PSC)

Airflow: Negative Pressure

Special Application: Explosion-Proof

Unit of Measure: EA

Marks & Listings: UL, ULC

Electrical Specifications: 120 V, 6.8 A, 816 W, 60 Hz

Weight, Product: 44 Lbs

Dimensions, Product: 23.72"W x 23.63"D x 19.86"H

Weight, Shipping: 64 lb

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

Package Type: Palletized

Manuals & Resources
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  1. Eyebolt with 1/4"-20 thread for lifting FFUs  |  6601-02 displayed
    Eyebolts, 1/4" - 20 thread, for FFU, 4 pack Quick Ship+ Available 372 in stock
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  2. Holds fan filter units secure in rigid ceilings without a T-bar grid.  |  6604-00 displayed
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  3. Simplifies filter leak testing and connection of Filter Backpressure Alarm  |  6601-99 displayed
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  4. FFU Testing and Certification; Flow Rate and Filter integrity
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  5. FasTrak 24-7 Expediting Service
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  6. Warranty; 2 Year, Terra-Manufactured Product, Parts
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  7. Warranty; 3 Year, Terra-Manufactured Product, Parts
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  8. ULPA Replacement Filter for FFU, with durable stainless steel frame to improve corrosion resistance  |  6601-28-S displayed
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  9. MERV 7 pre-filter for Terra Fan Filter Units (FFUs)  |  6601-34 displayed
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  10. MERV 7 pre-filter for Terra Fan Filter Units (FFUs)  |  6601-34 displayed
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  11. ULPA Replacement Filter for FFU, with durable stainless steel frame to improve corrosion resistance  |  6601-28-S displayed
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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

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.

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

Non-Sparking Direct-Drive Motor

Explosion-proof motors use a non-sparking polypropylene fan and cast-iron brackets attached to the heavy duty rolled steel frame

Explosion-Proof Junction Box

The reinforced junction box of the explosion-proof fan filter unit is built to withstand and contain an explosive reaction within the conduit system.

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.

Explosion-Proof Power Switches

UL-rated explosion-proof switches are connected to the lights and blowers using specialized conduit with potted fittings. All electrical components are sealed to eliminate potential ignition points.

Explosion-Proof Potted Fittings

Conduit is filled with an expanding cement mixture to isolate explosion-proof components from potential sources of ignition; explosion-proof fittings meet requirements of NEC for Class I, Division 1 hazardous locations.

Pre-Filter Grounding Clip

A grounding wire connects the body of the Explosion-Proof FFU to a metal wireframe embedded in the pre-filter as a safeguard against sparking.

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).

Product Prices Honored Worldwide

From Argentina to Zimbabwe, Terra's customers pay a single web-listed price for each product

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.
  • Explosion-Proof 40W LED Light

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  • Explosion-Proof Power Distribution Module

    Explosion-Proof Power Distribution Module (PDM) meets NEC code for a Class I/Division 1 hazardous location; includes all relays, breaks and other cleanroom electrical components
  • Challenge Port for Fan Filter Unit

    Challenge port for Fan/Filter Units simplifies filter leak testing and connection of Filter Backpressure Alarm (shown with optional pressure gauge; must be ordered with FFU).

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 * 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.