Explosion-proof RSR FFU allows filter access from inside the cleanroom enclosure. (6601-24-HRE model shown) | 6601-22A-URE displayed

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Explosion-Proof Fan Filter Units

• Unit of Measure: of 1

Manufactured By: Terra Universal

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Select Product Options

Voltage	Material	Size	Filter	Filter Replacement Access	Price	Usually Ships in	Stocked
120/240 V	Stainless Steel	2'x2'	ULPA	Room-Side	$3,331	10-14 Days
120/240 V	Stainless Steel	2'x2'	ULPA	Top Side	$3,833	0-6 Days
120/240 V	Stainless Steel	2'x3'	HEPA	Top Side	$3,164	1-3 Days	Stocked
120/240 V	Stainless Steel	2'x3'	ULPA	Room-Side	$3,331	10-14 Days
120/240 V	Stainless Steel	2'x4'	HEPA	Top Side	$3,164	10-14 Days
120/240 V	Stainless Steel	2'x4'	ULPA	Room-Side	$3,331	1-3 Days	Stocked

Summary

• Meets NEC requirements for Class I/Class II, Division 1 Hazardous locations

• Non-sparking motor, mounted in a cast-iron, explosion-proof housing

• Uniform airflow of HEPA- or ULPA-filtered air at an average speed of 90 fpm

• Proper installation of explosion proof equipment is critical to maintaining the explosion-proof protection aspects of the system. Therefore all wiring for explosion proof systems should be done in the field per local code by a licensed electrician.

• Room-side-replaceable filter units feature a Gel-sealed filter and easy-open clips to allow fast filter replacement from below without breaching the cleanroom ceiling

• Select HEPA filter (99.99% efficient @ 0.3 µm) or ULPA filter 99.999% efficient @ 0.12 µm)

• Average air flow: 650+ CFM under filter load

• Direct-drive 0.25HP fan-cooled motor is designed for continuous-duty operation

• All FFU data is based on a standalone unit using 1” prefilter and clean filters.

• Data will vary depending on filter media and configurations with other products/systems, such as ductwork or hoods.

Specifications

• Unit of Measure: of 1

Helena

• Marks & Listings: UL, ULC

Fan Filter Units

Explosion-Proof Fan-Filter Unit

Explosion-Proof WhisperFlow® Fan-Filter Units use sealed or non-sparking components for safe operation around flammable/explosive vapors and dusts Explosion-Proof Fan-Filter Unit Explosion-Proof WhisperFlow® Fan-Filter Units use sealed or non-sparking components for safe operation around flammable/explosive vapors and dusts; meet NEC standard for Class I, Division 1 hazardous locations.

Features and Benefits

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.

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.

Air Flow Uniformity to Improve Laminar Flow

Non-uniform air speeds produce turbulence that can recirculate particles into the air stream. Unique WhisperFlow® FFU baffling system and anodized diffuser plate promotes uniform laminar airflow to minimize turbulence and effectively carry away contaminating particles.

HEPA/ULPA filtration diagram with examples of filtered contaminants

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

Filter replacement alarm system with minihelic gauge and yellow power cable

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.

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.

Popular Accessories

For a full list of accessories, select a product then click Choose Accessories on that product page.

Explosion-Proof 40W LED Light
UL-listed for Class I, Division 1 and 2, Groups C and D areas, this low profile LED light produces 3,600 lumens and operates from 120 to 277VAC, 50/60Hz. The heat-dissipating housing increases the efficiency and lifespan of the LEDs.
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).
Safely Mount FFU’s Above Floor for Horizontal Laminar Airflow
The portable FFU base stand can be easily positioned to supply Class 100 horizontal laminar flow into a room or enclosure. It can also be positioned next to sensitive equipment/materials that are mounted close to the floor.