Product Details

  • Available ISO Ratings: ISO 5, ISO 6, ISO 7, ISO 8
  • Terminal diffuser supplies cost-effective HEPA-filtered air into ISO-rated cleanrooms
  • Includes adjustable air flow damper, accessed from within the cleanroom, to modulate air velocity
  • Damper screw adjustment, using a flathead screwdriver, opens or closes the damper plate to increase or reduce air flow
  • Unit includes specialized HEPA filter allowing for damper adjustment without filter removal
  • Allows users to seal duct before changing filter
  • Terminal diffuser supplies cost-effective HEPA-filtered air into ISO-rated cleanrooms
  • Includes 12"-diameter x 2"H collar for secure connection to air supply duct
  • Diffuser unit includes white mesh filter grille
  • Airflow performance is dependent upon flow of supplied air handler
  • 1/4-20 threaded inserts in top corners accommodate eyebolts to facilitate installation using suspended guy wires (order eyebolt package separately)
  • Includes FDA-approved silicone sealant (specify acrylic urethane or other required sealant type when unit is ordered)
  • Purchase optional Challenge Port Kit separately
  • Filter: 99.99% efficient HEPA, rated for particles of 0.3µm in diameter or larger
  • Lightweight for easy installation
  • Because filters are delicate and subject to damage during handling, all filter sales are final; no failure claims can be accepted


Type: Ducted

Material: Powder-Coated Steel

Filter Replacement Access: Top Side

Size: 2'x3'

Filter Frame Material: Aluminum

Filter: HEPA

Motor Type: None

Airflow: Positive Pressure

ISO Class: ISO 5

Unit of Measure: EA

Weight, Product: 53 lb

Dimensions, Product: 23.63" W x 35.63" D x 11.17" H

Weight, Shipping: 75 lb

Dimensions, Shipping: 50" W x 25" D x 19" H

Package Type: Palletized

Fan Filter Units

  • Terra Universal WhisperFlow® Filter Fan Units Terra Universal WhisperFlow® Filter Fan Units
  • 2' x 4' Ducted HEPA Filter Unit Ducted HEPA Filter Unit, 2' x 4'
Terra Universal WhisperFlow® Filter Fan Units

On a tight schedule? Choose FasTrak 24/7 Priority Service to help meet your critical schedule for Terra-manufactured products, either before or after your order is placed.*

  • FasTrak 24/7 provides a 24/7 commitment to meet the shipping date YOU specify, regardless of quoted lead times.
  • FasTrak 24/7 assigns a dedicated production team plus a dedicated senior expeditor working three shifts to meet your delivery specification.
  • FasTrak 24/7 guarantees* to meet the agreed-to specified ship date.

Call for pricing. FasTrak service fees cover costs of additional services only, without additional profit.

 * Terra's FasTrak services limited guarantee: to ship on the ESD or date specified OR to refund up to 100% of FasTrak charges. This guarantee covers no direct, special, consequential or other damages and is strictly limited to up to 100% of the amount paid for FasTrak service. When a specified ship date is missed due to factors outside Terra's control (vendor performance, deliveries by shipping companies, etc.) and random factors such as accidents, the credit of up to 100% of the FasTrak 24/7 may not apply. FasTrak service requested after order placement will be quoted and accepted based on available time remaining before required ship date.