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ULPA filtered fan unit with heater up to 100F, for cleanroom applications | 6601-24-UT displayed
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Product Group:
6601-PP-16
6601-PP-16

Heated Fan Filter Units

Manufactured By: Terra Universal
  • Available Certified ISO Grade Designs: ISO 6, ISO 7, ISO 8
  • Accelerates parts drying after cleaning and sterilization
  • Suitable for biocompatibility testing or other processes that require ultra clean filtered air at elevated temperatures
  • ULPA Filter for ISO 4 (Class 10) applications: 99.999% efficient Ultra-Low Penetration Air, rated at particles 0.12µm diameter
  • Includes heating element, thermocouple, and insulation to provide safe, controlled heating up to 100 degrees F
  • Note: Requires dedicated 20A circuit

• Certified ISO Grade Design: ISO 6

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Stocked WhisperFlow ISO 6 Icon
Manufactured By: Terra Universal
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 Terra Part #Price Ships in
120 V Powder-Coated Steel 2'x2' ULPA Top Side Heated Straight Blade 6601-22-UT $2,873 0-2 Days2
Quick Ship+ Available Only 5 left in stock
120 V Powder-Coated Steel 2'x3' ULPA Top Side Heated Straight Blade 6601-23-UT $2,873 1-3 Days3
Quick Ship+ Available Only 2 left in stock
120 V Powder-Coated Steel 2'x4' ULPA Top Side Heated Straight Blade 6601-24-UT $2,386 0-2 Days4
Quick Ship+ Available Only 3 left in stock
240 V Powder-Coated Steel 2'x2' ULPA Top Side Heated 6601-22A-UT-220 $2,585 10-14 Days5
240 V Powder-Coated Steel 2'x3' ULPA Top Side Heated 6601-23A-UT-220 $2,585 10-14 Days6
240 V Powder-Coated Steel 2'x4' ULPA Top Side Heated 6601-24A-UT-220 $2,356 10-14 Days7
120 V Powder-Coated Steel 2'x2' ULPA Room-Side Heated 6601-22A-URT $2,861 10-14 Days8
120 V Powder-Coated Steel 2'x3' ULPA Room-Side Heated 6601-23A-URT $2,861 10-14 Days9
120 V Powder-Coated Steel 2'x4' ULPA Room-Side Heated 6601-24A-URT $2,607 10-14 Days10
240 V Powder-Coated Steel 2'x4' ULPA Room-Side Heated 6601-24A-URT-220 $2,786 10-14 Days11
240 V Powder-Coated Steel 2'x2' ULPA Room-Side Heated 6601-22A-URT-220 $3,058 10-14 Days12
240 V Powder-Coated Steel 2'x3' ULPA Room-Side Heated 6601-23A-URT-220 $3,058 10-14 Days13
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Product Details
Product Details
  • Available Certified ISO Grade Designs: ISO 6, ISO 7, ISO 8
  • Accelerates parts drying after cleaning and sterilization
  • Suitable for biocompatibility testing or other processes that require ultra clean filtered air at elevated temperatures
  • ULPA Filter for ISO 4 (Class 10) applications: 99.999% efficient Ultra-Low Penetration Air, rated at particles 0.12µm diameter
  • Includes heating element, thermocouple, and insulation to provide safe, controlled heating up to 100 degrees F
  • Note: Requires dedicated 20A circuit
  • Unique baffling and sound-deadening, ensure uniform face velocity and ultra-quiet operation
  • 304 stainless steel diffuser grille provides an easily sterilized surface
  • Room-Side Replaceable models allow fast filter replacement without the need for special tools
  • 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.

• Certified ISO Grade Design: ISO 6

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Fan Filter Units

  • Terra Universal WhisperFlow® Filter Fan Units Terra Universal WhisperFlow® Filter Fan Units
  • Heated Room Side Replaceable Fan Filter Units (FFUs) Heated Room Side Replaceable WhisperFlow® Fan Filter Units (FFUs)
Terra Universal WhisperFlow® Filter Fan Units
Overview video of Terra Universal's comprehensive portfolio of filter fan units Terra Universal WhisperFlow® Filter Fan Units Overview video of Terra Universal's comprehensive portfolio of filter fan units
Heated Room Side Replaceable Fan Filter Units (FFUs)
6601-PP-16

Heated Room Side Replaceable WhisperFlow® Fan Filter Units (FFUs)

Heated Room-Side Replaceable WhisperFlow Fan Filter Units (FFUs) provides a uniform flow of heated ULPA-filtered air for parts drying, biocompatability testing and other operations at above-ambient temperatures; filter can be serviced from inside the room to prevent the need for cleanroom shut-down.

Heated Room-Side Replaceable (RSR) WhisperFlow™ Fan/Filter Units provide a uniform flow of heated ULPA-filtered air for parts drying | 6601-24-URT displayed Heated Room Side Replaceable WhisperFlow® Fan Filter Units (FFUs) Heated Room-Side Replaceable WhisperFlow Fan Filter Units (FFUs) provides a uniform flow of heated ULPA-filtered air for parts drying, biocompatability testing and other operations at above-ambient temperatures; filter can be serviced from inside the room to prevent the need for cleanroom shut-down.
Features & Benefits

Features and Benefits

Learn More: Filter Fan Units Prevent Infection
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Did You Know?
HEPA/ULPA Filters Do More Than Meet ISO Requirements - they also prevent infection.

Most cleanroom professionals understand that HEPA and ULPA filters capture contaminants that degrade particle-sensitive samples. But they also help remove bacteria, mold spores, and many viruses that contribute to a host of infections.

Most common bacteria are contained by the 0.3-micron pore size of high-efficiency particular air (HEPA) filters. Ultra-Low Penetration Air (ULPA) filters, which are rated 99.999% efficient at retaining particles of 0.12 microns and larger in diameter, capture ultra-fine contaminants, including many large viruses and mold spores.

These filters also remove aerosol-born pathogens - germs that hitch a ride on larger particles and liquid droplets that are captured in a HEPA or ULPA filter. HEPA- or ULPA-based Fan/Filter Units (FFUs) thus can play an important role in infection prevention in surgical theaters, ICUs and other medical settings.

Additionally, HEPA filters can help filter pollen, tiny insects, bacteria, mold, and other fungal spores that might be present during plant tissue culture or cannabis production. Contaminants such as these can find a way in via personnel or normal HVAC units and can blight crops and reduce yields. HEPA Filters help increase crop yields, pass inspection/meet regulations, and reduce contamination.

Here is a list of common human pathogens that HEPA/ULPA filters capture and remove from circulation:

Pathogens: Bacteria and Diseases
  • SARS-CoV-2: Coronavirus (COVID-19)
  • Escherichia coli: Gastrointestinal infection
  • Bacillus anthracis : Anthrax
  • Aspergillus brasiliensis: Sinus infections
  • Francisella tularensis: Tularemia
  • Bordetella pertussis : Whooping cough
  • Mycoplasma pneumoniae: Pneumonia
  • Chlamydia pneumoniae: Bronchitis
  • Chlamydia psittaci : Psittacosis
  • Klebsiella pneumoniae: Opportunistic infections
  • Haemophilus influenzae : Meningitis
  • Coxiella burnetii: Q fever
  • Pseudomonas aeruginosa: Opportunistic infections
  • Actinomyces israelii: Actinomycosis
  • Legionella pneumophila: Legionaire's disease
  • Thermoactinomyces sacchari: Farmer's lung
  • Alcaligenes: Opportunistic infections
  • Streptococcus pyogenes: Scarlet fever
  • Mycobacterium Tuberculosis: Tuberculosis

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

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Terra employs an international network of more than 20 local sales reps trained to provide comprehensive service on Terra's complete catalog of products

Products Compliant With Your ISO Rating

High-capacity, durable, ISO-compliant system rated for thousands of operating hours.
Available Accessories
Popular Accessories
For a full list of accessories, select a product then click Choose Accessories on that product page.
  • Energy-Efficient LED Lighting Panels

    Energy-Efficient Lighting

    Energy-efficient LED lighting panels and strips help to lower electrical costs and minimize heat build-up in temperature-controlled environments.
  • Fan Filter Unit Power Cord Adapter

    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 Installed on Cleanroom Fan/Filter Unit

    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.
  • Fan Filter Unit Mounting Frame, for Ceiling Installation

    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 Swtich for Clean Room Fan Filter Units

    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 for Fan Filter Unit

    Filter Replacement Alarm

    The filter replacement alarm monitors filter backpressure and issues an alarm when filter needs replaced (requires selection of fan filter unit with challenge port, order separately).
  • Fan Filter Unit Control System

    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, Lights

    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.

  • 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).
  • 2’x2’ replacement filter for roomside replaceable (RSR) Fan Filter Unit (FFU), inside view
    Learn More

    Replacement Filters

    Purchase replacement filters ahead of time to prevent costly operational interruptions and avoid damage to fan blowers caused by excessive backpressure from long overdue filter replacements.
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