Fan Filter Unit, Explosion-Proof, 2'x4', HEPA, 120/240 V, Stainless Steel, WhisperFlow, BioSafe®, Terra Universal (CAT#: STEM-C-0076-ZJF)

The Explosion-Proof Fan Filter Unit 6601-24-HESS manufactured by Terra Universal provides a steady laminar flow stream of HEPA filtered air to the area below the mounted unit.
AC 1-speed blower motor:0.25HP, 1140 RPM, direct-drive, fan-cooled.
Optional Challenge Port Kit can be ordered separately.
Operating Ratings:
Average CFM (m^3/hr) 717 (1218)
Air Flow - FPM (m/s) 102 (0.51) (measured 6" (132mm) below filter face)
Internal baffling plate and diffuser panel make the air flow quiet and even.
Threaded holes 1/4 ( 6 mm) -20 in corners make the unit easy to hang and mount.
FDA-approved silicone sealant has good sealing, high safety and durability.
HEPA Filter: 99.99% efficient High-Efficiency Particular Air, rated at particles 0.3µm diameter.
All wiring is securely embedded in packed rigid conduits to meet class I/II requirements.
All wiring of the explosion-proof system shall be done on site by a licensed electrician according to local regulations to ensure the safety and effectiveness of the explosion-proof protection.
Explosion-proof motor meets NEC requirement for Class I Group C&D, Class II Group F&G, Division 1 hazardous locations.
At an average air velocity of 90 FPM, the noise is as low as 49 dB.
The model 6601-25 filter can be ordered separately for replacement.
All FFU data is based on a standalone unit using 1" prefilter and clean filters.
Data will change according to filter media and configurations with other products or systems.

Type: Explosion-Proof
Material: Stainless Steel
Filter Replacement Access: Top Side
Size: 2'x4'
Filter Frame Material: 304 Stainless Steel
Filter: HEPA
Motor Type: Permanent Split capacitor (PSC)
Airflow: Positive Pressure
Special Application: Explosion-Proof
Unit of Measure: EA
Marks & Listings: UL, ULC
Electrical Specifications: 120/240 V, 6.8 A, 816 W, 60 Hz
Weight, Product: 75 Lbs
Dimensions, Product: 23.72"W x 36"D x 19.86"H
Weight, Shipping: 95 lb
Dimensions, Shipping: 29"W x 53"D x 27"H
Package Type: Palletized
Warranty: 1 year parts, 90 days labor

Diffuser Panel Promotes Air Flow Uniformity and Protects Filter Integrity: Unlike other manufacturers, Terra's FFUs use a unique perforated panel like a shower head beneath the filter, to protect the filter and make laminar air flow more uniform by preventing 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.
Gel-Filled Channel on Room-Side Replaceable Filter: Gel-filled channel on room-side replaceable filter creates a closed passageway, so it allows the filter to be changed easily, safely and quickly during the operation of the fan filter unit.
Explosion-Proof Power Switches: UL-rated explosion-proof switches are connected to the circuit by special conduit. All electrical components are sealed to eliminate potential combustion hazards.
Explosion-Proof Potted Fittings: Conduit is filled with an expanded cement mixture to isolate the explosion-proof components from potential ignition sources; 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 wire frame embedded in the prefilter to prevent sparks.
Non-Sparking Direct-Drive Motor: Explosion-proof motors use a non-sparking polypropylene fan and cast-iron brackets connected to the heavy-duty rolled steel frame.
Explosion-Proof Junction Box: The reinforced junction box can withstand and contain the explosive reaction in the conduit.
Airflow Uniformity Improves Laminar Flow: Unique WhisperFlow® FFU baffling system and anodized diffuser plate minimize turbulence and effectively carry away contaminating particles by making laminar airflow more uniform.
Network of International Reps: Terra Universal has an international network of more than 20 local sales reps trained to provide comprehensive service for all Terra Universal's products.

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