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WhisperFlow® Fan/Filter Units

Manufactured By: Terra Universal

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Material All Powder-Coated Steel Stainless Steel Sort Order: Descending Ascending	Size All 2' x 3' 2' x 4' 2' x 2' Sort Order: Descending Ascending	Filter All ULPA HEPA Sort Order: Descending Ascending	Filter Replacement Access All Room-Side Top Side Sort Order: Descending Ascending	Voltage All 220 V 120 V 240 V Sort Order: Descending Ascending	Terra Part #	Price	Ships in
Powder-Coated Steel	2' x 3'	ULPA	Room-Side	220 V	6601-23A-UR-220	$1,381	1-3 Days
Powder-Coated Steel	2' x 3'	ULPA	Room-Side	120 V	6601-23A-UR	$1,255	1-3 Days
Powder-Coated Steel	2' x 3'	ULPA	Top Side	240 V	6601-23-U-220	$964	1-3 Days
Powder-Coated Steel	2' x 3'	ULPA	Top Side	120 V	6601-23-U	$876	1-3 Days
Powder-Coated Steel	2' x 3'	HEPA	Room-Side	220 V	6601-23A-HR-220	$1,271	1-3 Days
Powder-Coated Steel	2' x 3'	HEPA	Room-Side	120 V	6601-23A-HR	$1,055	1-3 Days
Powder-Coated Steel	2' x 3'	HEPA	Top Side	240 V	6601-23-H-220	$854	1-3 Days
Powder-Coated Steel	2' x 3'	HEPA	Top Side	120 V	6601-23-H	$776	1-3 Days
Powder-Coated Steel	2' x 4'	ULPA	Room-Side	220 V	6601-24A-UR-220	$1,381	1-3 Days
Powder-Coated Steel	2' x 4'	ULPA	Room-Side	120 V	6601-24A-UR	$1,255	1-3 Days
Powder-Coated Steel	2' x 4'	ULPA	Top Side	240 V	6601-24-U-220	$964	1-3 Days
Powder-Coated Steel	2' x 4'	ULPA	Top Side	120 V	6601-24-U	$876	1-3 Days
Powder-Coated Steel	2' x 4'	HEPA	Room-Side	220 V	6601-24A-HR-220	$1,271	1-3 Days
Powder-Coated Steel	2' x 4'	HEPA	Room-Side	120 V	6601-24A-HR	$1,055	1-3 Days
Powder-Coated Steel	2' x 4'	HEPA	Top Side	240 V	6601-24-H-220	$854	1-3 Days
Powder-Coated Steel	2' x 4'	HEPA	Top Side	120 V	6601-24-H	$776	1-3 Days
Powder-Coated Steel	2' x 2'	ULPA	Room-Side	220 V	6601-22A-UR-220	$1,381	1-3 Days
Powder-Coated Steel	2' x 2'	ULPA	Room-Side	120 V	6601-22A-UR	$1,255	1-3 Days
Powder-Coated Steel	2' x 2'	ULPA	Top Side	240 V	6601-22-U-220	$964	1-3 Days
Powder-Coated Steel	2' x 2'	ULPA	Top Side	120 V	6601-22-U	$876	1-3 Days
Powder-Coated Steel	2' x 2'	HEPA	Room-Side	220 V	6601-22A-HR-220	$1,271	1-3 Days
Powder-Coated Steel	2' x 2'	HEPA	Room-Side	120 V	6601-22A-HR	$1,055	1-3 Days
Powder-Coated Steel	2' x 2'	HEPA	Top Side	240 V	6601-22-H-220	$854	1-3 Days
Powder-Coated Steel	2' x 2'	HEPA	Top Side	120 V	6601-22-H	$776	1-3 Days
Stainless Steel	2' x 3'	HEPA	Room-Side	240 V	6601-23A-HRSS-220	$2,041	1-3 Days
Stainless Steel	2' x 3'	HEPA	Room-Side	120 V	6601-23A-HRSS	$1,871	1-3 Days
Stainless Steel	2' x 3'	HEPA	Top Side	120 V	6601-23-HSS	$1,376	1-3 Days
Stainless Steel	2' x 4'	ULPA	Room-Side	240 V	6601-24-URS-220	$1,686	1-3 Days
Stainless Steel	2' x 4'	HEPA	Room-Side	240 V	6601-24A-HRSS-220	$2,114	1-3 Days
Stainless Steel	2' x 4'	HEPA	Room-Side	120 V	6601-24-HRSS	$1,944	1-3 Days
Stainless Steel	2' x 4'	HEPA	Top Side	120 V	6601-24-HSS	$1,376	1-3 Days
Stainless Steel	2' x 2'	HEPA	Room-Side	240 V	6601-22A-HRSS-220	$2,104	1-3 Days
Stainless Steel	2' x 2'	HEPA	Room-Side	120 V	6601-22A-HRSS	$1,871	1-3 Days
Stainless Steel	2' x 2'	HEPA	Top Side	240 V	6601-22-HSS-220	$1,514	1-3 Days
Stainless Steel	2' x 2'	HEPA	Top Side	120 V	6601-22-HSS	$1,376	1-3 Days
Powder-Coated Steel	2' x 2'	ULPA	Top Side	240 V	6601-22-U-220-CE	$1,188	1-3 Days
Powder-Coated Steel	2' x 3'	ULPA	Top Side	240 V	6601-23-U-220-CE	$1,188	1-3 Days
Powder-Coated Steel	2' x 4'	HEPA	Top Side	120 V	6601-24-H2	$897	1-3 Days
Powder-Coated Steel	2' x 3'	HEPA	Top Side	120 V	6601-23-H2	$776	5-9 Days
Powder-Coated Steel	2' x 2'	HEPA	Top Side	120 V	6601-22-H-CA	$866	5-9 Days
Powder-Coated Steel	2' x 3'	HEPA	Top Side	120 V	6601-23-H-CA	$866	1-3 Days
Powder-Coated Steel	2' x 4'	HEPA	Top Side	120 V	6601-24-H-CA	$866	1-3 Days
Powder-Coated Steel	2' x 4'	HEPA	Top Side	120 V	6601-24-H-NC	$637	1-3 Days

Material

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Filter

Filter Replacement Access

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Product Details

Features & Benefits

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Product Details

Designed in the USA

• Minimizes cleanroom service downtime with room-side-replaceable fan filter units

• 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

• WhisperFlow baffling technology supports uniform air speed across the filter face, ensuring laminar airflow

• Three speed settings simplify air balancing

• Low-profile design allows cleanroom installation inside rooms with standard 9-foot ceilings

• Meets IEST Recommended Practices

• Models with all-stainless steel housing and filter frame meet strictest cleanroom requirements

• Speak with a Terra sales associate for recommendations on quantities to meet specified requirements

• Quiet, low-vibration design: only 49 dBA, measured 30" from filter face @ 90 FPM

• Provides an average airflow velocity of 90+ feet per minute and airflow of 640+ CFM under filter load at Medium speed setting

• Choose from cold rolled steel or all stainless steel housing

• Choose from room-side-replaceable or top-side-replaceable filter

• HEPA (High-Efficiency Particulate Air) filters are rated 99.99% efficient at removing particles ≥ 0.3 microns

• ULPA (Ultra-Low Penetration Air) filters are rated 99.999% efficient at removing particles ≥ 0.12 microns

• Provides years of no-maintenance, 24/7 operation (depending on air quality)

• Motor: 1/4 HP Direct drive, thermally protected with automatic overload reset

• Forward-curved centrifugal fans

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

• Includes a MERV 7 pre-filter

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

Features & Benefits

Features and Benefits

Quick-Connect Cleanroom Component Fittings

Quick-Connect Fittings

FFUs and lights can be easily added as cleanrooms requirements change, or disconnected for maintenance, without the need to run additional power lines or involve an electrician.

Gel-Filled Channel on Room-Side Replaceable Filter

Gel-filled channel on room-side replaceable filter forms a tight seal against knife edge on fan housing, allowing fast, simple filter replacement from inside the cleanroom without the need for costly cleanroom shut-down.

Rotating Clamps on Room-Side Replaceable Fan Filture Unit

Easy-Release Filter Clamp on Room-Side Replaceable FFU

Easy-release clamps rotate to release filter on Room-Side Replaceable Fan Filter Units, simplifying filter servicing without the need for a cleanroom shut-down.

Air Flow Uniformity

Unique WhisperFlow® FFU baffling system and anodized diffuser plate promote uniform air speed across the filter face.

Fan Filter Unit with Vapor-Removal and Sanitizing Module

Full Range of Designs, Configurations!

WhisperFlow® FFFUs come in all styles: room-side replaceble, all-stainless steel, HEPA or ULPA filtration, EC energy-saving fans, reverse flow and more (shown: vapor filtration module with UV sanitation lamp).

Eliminate Contaminants and Pathogens

HEPA and ULPA filters capture many bacteria, viruses, and mold spores that contribute to a host of infections for both humans and plant/animal tissue cultures

Available Accessories

Popular Accessories

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

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.
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.
FFU Mounting Frame; Stainless Steel

Stainless steel Fan Filter Unit (FFU) mounting frame supports FFU on drywall or other rigid ceiling material, viewed from above ceiling panel (FFU not included).
Night Service Saves Energy, Extends Filter Life!

Night service switch, shown mounted on Modular Hardwall Cleanroom panel, puts FFUs in low-energy mode during off-hours; saves 25% of fan operating costs and extends filter life.
Filter Replacement Alarm

The Filter Replacement Alarm monitors filter backpressure and issues an alarm when fitler needs replaced (requires selection of Fan Filter Unit with Challenge Port, order separately).
Fan Filter Unit Control System

Provides room-by-room monitoring and control of Smart WhisperFlow FFUs to maintain target pressure differentials for ISO classification; temperature, humidity and particle monitoring and data logging, as well as dynamic fan set-point control, also available.
Power Distribution Modules for Cleanroom FFUs and Lights

UL-listed power distribution modules include all breakers, transformers and other electrical components for FFU/light connections; allows fast addition or relocation of FFUs or lights without the need for rewiring.
Filter Covers Allow Ceiling Wash-Down

Ceiling Filter Fan Unit (FFU) covers allow wash-down and sterilization of cleanroom walls and ceilings without damage to filter medium; requires BioSafe glass or stainless steel wall panels, which stand up to biocides.
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).