Terra Part # 6601-1636B-H-LP
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Accessories related to Terra Part # 6601-1636B-H-LP
Fan Filter Unit; Narrow Low Profile, 8"H, 16" x 36", HEPA, 120 V, Powder-Coated Steel, WhisperFlow
Product Details
  • Available ISO Ratings: ISO 5, ISO 6, ISO 7, ISO 8
  • Low profile fan filter units are ideal for cleanrooms with restricted height areas
  • High Efficiency Particulate Air (HEPA) Filter: 99.99% efficient at 0.3µm particle diameter
  • Variable speed control dial for precise air flow control
  • FDA-approved silicone sealant prevents air leakage without harmful outgassing chemicals
  • Backward-curved fan for optimized efficiency
  • 4-pin connector for easy installation to Terra cleanrooms (connector may be used with an optional wall plug adapter; or  may be removed entirely to hard-wire the FFU)
  • Filters are leak tested in accordance with IEST standards and meet UL 900
  • See performance data and submittal sheets for additional information
  • Optional Accessories:
  •           Challenge port kit
  •           Power plug adapter
  •           Stainless surface mount frame for installing FFU in ceiling without T-grid
  •           Replacement filter
  •           Filter replacement alarm
  •           Ionizing bar
  •          Control panel with power distribution modules
  • All filter sales are final; returns for this item cannot be accepted

Type: Narrow Low Profile

Material: Powder-Coated Steel

Filter Replacement Access: Top Side

Size: 16" x 36"

Filter: HEPA

Motor Type: Permanent Split Capacitor (PSC)

Speed Control: Variable Speed Control

Blower Type: Backward Curved

Active Filter Face Area: 2.2 ft²

Unit of Measure: EA

Marks & Listings: UL, ULC

Electrical Specifications: 120 V, 1 Ph, 60 Hz

Manuals & Resources
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  1. Safely neutralizes surface charges to protect against electro-static discharge (ESD)  |  2005-06A displayed
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  2. Holds fan filter units secure in rigid ceilings without a T-bar grid.  |  6604-00 displayed
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  3. Cable Extension, PVC, 4 Poles, 5M, 22awg, 300V, straight male to straight female with close-up  |  6601-39 displayed
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  4. Simplifies filter leak testing and connection of Filter Backpressure Alarm  |  6601-99 displayed
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  5. Night service switch, shown mounted on Modular Hardwall Cleanroom panel, puts FFUs in low-energy mode during off-hours  |  6601-70 displayed
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  6. Suitable for air handling  |  6602-40 displayed
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  7. Four-pin power cord adapter for fan/filter unit allows connection to standard 120VAC/60Hz power receptacle  |  6601-13 displayed
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  8. Eyebolt with 1/4"-20 thread for lifting FFUs  |  6601-02 displayed
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  9. FFU Connect pack includes flexible ducting and all hardware required to connect and seal the duct.  |  6601-01 displayed
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  10. Duct Flange Adapter for standard FFUs; 12" dia, 19.5" W x 19.5" D x 2" H, galvanized steel
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  11. FFU Testing and Certification; Flow Rate and Filter integrity
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  12. FasTrak 24-7 Expediting Service
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  13. MERV 7 pre-filter for Terra Fan Filter Units (FFUs)  |  6601-34 displayed
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Fan Filter Units

  • Terra Universal WhisperFlow® Filter Fan Units Terra Universal WhisperFlow® Filter Fan Units
Terra Universal WhisperFlow® Filter Fan Units

Features and Benefits

Diffuser Panel Promotes Air Flow Uniformity and Protects Filter Integrity

Unlike other manufacturers, Terra’s FFUs include a unique perforated panel beneath the filter, acting as a shower head, to guarantee filter protection and laminar air flow uniformity, which prevents localized air swirling, particle build-up and turbulence.

Low Profile FFU Design Only 8-Inches Tall

Low profile fan filter units are ideal for cleanrooms with height constraints. They stand 8 inches tall, compared to a standard FFU that stands 13.5 inches tall. The variable speed control dial allows for precise air flow control.

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

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.

Clean and Durable Powder Coat Finish

Terra’s signature white powder coat finish provides a high quality, durable barrier to protect against corrosion, plus a clean and attractive aesthetic. The advanced heat-fused formulation exceeds ASTM and ISO paint standards to resist chipping, scratching, fading, and wearing.

Network of International Reps

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

Wide Selection of Global Shipping Options

Terra offers a broad range of global shipping services including door-to-door and white glove delivery. Each product is safely packaged in a heat-treated wooden crate that meets international shipping standards.

Products Compliant With Your ISO Rating

High-capacity, durable, ISO-compliant system rated for thousands of operating hours.
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.
  • 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).
  • 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).

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.
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  • 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.