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Dual 2' x 4' ULPA filters provide exceptional particle capture across a wider filtration surface | 6601-66-XL-SS-CW displayed
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WhisperFlow® UltraClean™ Portable ULPA Filtration System, Double Capacity, with Integrated CleanWatch+®, 316L SS

Terra Part #: 6601-66-XL-SS-CW
Manufactured By: Terra Universal
Warranty: 1 year parts, 90 days labor
LTL freight shipment. Dock or liftgate may be required.
  • Available Certified ISO Grade Designs: ISO 5, ISO 6, ISO 7, ISO 8
  • ULPA filters capture bacteria and viruses to reduce risk of infection
  • Portable isolation room filtration system suitable for negative pressure or recirculation
  • Medical grade air filtration system quickly converts any room to a negative pressure isolation room
  • Mobile, self-contained, high capacity air purifier with small footprint easily rolls between rooms
  • Clean Air Delivery Rate (CADR) of 800 CFM replaces air 5x per hr in a room 1,000 sqft x 9 ft high

• Material: 316L SS

• Filter: ULPA

• Motor Type: Electronically Commutated (EC)

• Motor HP: 1/3 hp

• Special Application: Double Capacity

• Speed Control: Variable Speed Control

• Blower Type: Forward Curved

• Pre-Filter: MERV 7

• Battery Powered: No

• UV Lamp: N/A

• Certified ISO Grade Design: ISO 5

• ISO Rated Air Cleanliness: ISO 4

• Watts @ max CFM: 350 W

• Watts @ 630 CFM: 180 W

• Sound (dB.) @ 630 CFM: 50 dB

• Unit of Measure: EA

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Latest model - What's new
  • CleanWatch Environmental Control Compatibility
  • Double Capacity
Stocked WhisperFlow ISO 5 Icon Quick Ship +
Terra Part #: 6601-66-XL-SS-CW
Manufactured By: Terra Universal
Warranty: 1 year parts, 90 days labor
LTL freight shipment. Dock or liftgate may be required.
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6601-66-XL-SS-CW
Terra Part # 6601-66-XL-SS-CW
$5,895
*includes web discount for online orders Web-exclusive discount applies only to quotes/orders placed directly on our website; not valid for phone, email, or other ordering methods.
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WhisperFlow® UltraClean™ Portable ULPA Filtration System, Double Capacity, with Integrated CleanWatch+®, 316L SS
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Details & Specs
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Product Details
  • Available Certified ISO Grade Designs: ISO 5, ISO 6, ISO 7, ISO 8
  • ULPA filters capture bacteria and viruses to reduce risk of infection
  • Portable isolation room filtration system suitable for negative pressure or recirculation
  • Medical grade air filtration system quickly converts any room to a negative pressure isolation room
  • Mobile, self-contained, high capacity air purifier with small footprint easily rolls between rooms
  • Clean Air Delivery Rate (CADR) of 800 CFM replaces air 5x per hr in a room 1,000 sqft x 9 ft high
  • Performance Data and Submittals
  • In addition to wearing face masks and staying at least six feet away from other people, good air circulation and ventilation inside buildings will reduce the spread of harmful contaminants in aerosols.
  • Medical grade air filter system is ideal for clinics, waiting rooms, hospital emergency rooms, schools, court houses, and other confined areas without access to open windows for outdoor air circulation.
  • High-capacity design features two large 2' x 4' ULPA filters, allowing longer operation with fewer filter replacements.
  • Mobile filtration system features powerful blower to supply a Clean Air Delivery Rate (CADR) of 800 CFM to minimize the spread of airborne diseases.
  • One way to measure ventilation is to determine how often the air in a space is completely replaced. This is called Air Changes per Hour (ACH). In a 900 sq.ft. (30-foot by 30-foot by 9-foot high) room with 25 people in it, the air can be replaced roughly every 10 minutes, which equals an ACH of 6. Higher ACH lowers the risk of disease spreading through the air.
  • Mobile hospital air purification system easily configures for recirculation or negative pressure:
  • For recirculation: room air and airborne contaminants are drawn through intake grille at the bottom, and purified air is discharged from the exhaust grille at the top to generate a sweeping, low-to high air circulation pattern to optimize clean breathing zone for patient and staff.
  • For negative pressure: simply connect flexible ducting to the top exhaust to direct exhaust through a window or wall. The system creates a negative pressure environment isolation room, suitable for use with patients known or suspected of having infectious diseases.
  • For positive pressure: connect the ducted top exhaust to the cleanroom to feed in ISO 4 air. Suitable for applications with not enough height clearance to mount FFUs on the ceiling of a room.
  • CleanWatch+®: Built-in CleanWatch+® environmental monitoring system tracks both differential particle counts and pressure — keeping critical cleanroom conditions visible at a glance.
  • Quiet, low vibration ULPA filter system; under 50 dBA measured 12 in. from unit minimizes distracting background noises.
  • Ultra-Low Particulate Air (ULPA) Filter: 99.999% efficient at 0.12µm particle diameter
  • Uses a lightweight, forward-curved fan powered by a 120V 60Hz motor
  • Variable speed dial simplifies air balancing
  • Filters are leak tested in accordance with IEST standards and meet UL 900
  • Includes 10ft medical grade power cable
  • NOTE:
  • Customer must determine if filter leak testing is required for their application. This unit is not leak rated. If a leak test is required, units leak-tested to meet ISO 14644-3 are optionally available.
  • All filter sales are final; returns cannot be accepted due to the sensitive nature of HEPA filters. Leak tested filters may qualify for limited replacement if a defect is identified upon delivery.

• Material: 316L SS

• Filter: ULPA

• Motor Type: Electronically Commutated (EC)

• Motor HP: 1/3 hp

• Special Application: Double Capacity

• Speed Control: Variable Speed Control

• Blower Type: Forward Curved

• Pre-Filter: MERV 7

• Battery Powered: No

• UV Lamp: N/A

• Certified ISO Grade Design: ISO 5

• ISO Rated Air Cleanliness: ISO 4

• Watts @ max CFM: 350 W

• Watts @ 630 CFM: 180 W

• Sound (dB.) @ 630 CFM: 50 dB

• Unit of Measure: EA

• Electrical Specifications: 120 V, 3.8 A, 440 W, 1 Ph, 50/60 Hz

• Weight, Product: 300 lb

• Dimensions, Product: 57" W x 18" D x 59.5" H

• Weight, Shipping: 380 lb

• Dimensions, Shipping: 68" W x 24" D x 66" H

• Package Type: Palletized

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  • smoke study video of terra's hepa air purifier High-Capacity Portable HEPA Air Purifier | Smoke Study
  • Portable HEPA Filtration System Watch Terra's Portable HEPA Filtration System Video
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  • Terra Universal WhisperFlow® Filter Fan Units Terra Universal WhisperFlow® Filter Fan Units
smoke study video of terra's hepa air purifier
Terra's portable HEPA air purifier clears smoke in under 9 minutes with 800 CFM airflow and 99.97% contaminant capture using its large 2'x4' filter High-Capacity Portable HEPA Air Purifier | Smoke Study Watch Terra’s portable HEPA air purifier clear a smoke-filled room in under 9 minutes!

Its large 2'x4' HEPA filter captures 99.97% of airborne contaminants, including smoke, bacteria, and pollen. While delivering up to 800 CFM, providing over eight times the airflow of typical residential units.
Portable HEPA Filtration System
Terra's in stock portable HEPA filtration systems provide high quality and medical grade air filtration for your ambient environment. Watch Terra's Portable HEPA Filtration System Video The mobile/ self contained filtration system converts to any room to a negative pressure isolation room which then makes it well suited for medical clinics, schools, waiting rooms and other confined areas.
Terra Universal offers an extensive portfolio of COVID-19 contamination control products for employee protection, surface disinfection and product sterilization COVID-19 Contamination Control Products by Terra Universal As personal and professional lives shift dramatically in response to the COVID-19 pandemic, businesses are searching for methods to reduce the transmission risk of COVID-19 in the workplace. Terra Universal offers an extensive product portfolio to support employee protection, surface disinfection and product sterilization. Let’s take a closer look at two products designed to control the spread of COVID-19.
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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

Features and Benefits

CleanWatch+ Integrated Environmental Monitoring

CleanWatch+ environmental monitoring system expands functionality with real-time air particulate counting and differential pressure monitoring. Integrated data logging ensures continuous documentation of environmental conditions for compliance and quality assurance.

Easily Converts from Recirculation to Ducting for Positive or Negative Pressure Applications

Portable isolation room filtration system easily configures for recirculation or safe exhaust. In exhaust mode, a flange adapter attaches to the top of the unit for connection to ducting. The ducting then re-directs filtered air outside the room. The ducting can also be used to feed ISO 5 air into a cleanroom.

Room Coverage and Air Changes per Hour

Filters 9ft high 300 sq. ft. with 17.8 air changes per hour, or once every 3.4 minutes. Filters 500 sq. ft. with 10.7 air changes per hour. Filters 800 sq. ft. with 6.7 air changes per hour. Filters 1,600 sq. ft. with 3.3 air changes per hour.

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

Portable Isolation Room Filtration System

Use this mobile medical grade air filtration system to recirculate HEPA-filtered air in confined areas or quickly convert any room to a negative pressure isolation room.

CleanWatch+ Portal: Centralized Environmental Monitoring

CleanWatch+ Portal enables secure access to collected and stored sensor data from any location via Terra’s cloud platform, with OTA technology supporting continuous updates and system reliability.

Continuous Product Improvement

At Terra, we strive to develop and produce the highest quality products for our customers to improve health, safety, performance, and yields. Our product quality is enabled by high-grade manufacturing equipment and processes, 50 years of engineering and application expertise, and our commitment to continuously improve.

Comprehensive Product Portfolio

Terra’s comprehensive product portfolio includes solutions for every application and budget. Our technical sales staff will guide you toward the product most suitable for your requirements.

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Terra is committed to building long-term relationships with satisfied clients; 94% of orders each year come from repeat customers
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