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Voltage Model ISO Class Inside Width Inside Depth Inside HeightPriceUsually Ships inStocked
120 VHorizontal Laminar Flow StationISO 572"30"28" $15,1621-3 Days Stocked
120 VHorizontal Laminar Flow StationISO 596"30"28" $16,2721-3 Days Stocked
120 VHorizontal Laminar Flow StationISO 548"30"28" $12,2431-3 Days Stocked
240 VHorizontal Laminar Flow StationISO 572"30"28" $13,7844-6 Days
240 VHorizontal Laminar Flow StationISO 548"30"28" $11,1304-6 Days


  • Available ISO Ratings: ISO 5, ISO 6, ISO 7, ISO 8
  • Terra's Horizontal Laminar Flow Hood exceeds ISO 5 particle requirements for critical operations in the biotech, pharmaceuticals, electronics and semiconductor industries
  • Powerful, low-energy fan/filter modules provide a back-to-front laminar flow of HEPA-filtered air across the work surface
  • The variable-speed, electrically commutated filter/fan(s) provide average air speeds of 109 FPM (0.55 m/s) while maintaining an industry-best noise level of 50 dBA and energy efficiency
  • Internal baffling plates and anodized aluminum diffuser panel ensure uniform air speed across the work area
  • All models include a powder-coated steel stand with adjustable leveling feet that raise the work surface to 31” (787 mm) above the floor
  • Take-up ducts along the edges minimize turbulence in the work area, providing a smooth exit for airflow
  • Built-in recessed illuminator provides diffused lighting without interfering with laminar flow
  • Interior surfaces, including the side panels and work surface, are 304-stainless steel; as an option, components can be electropolished to remove subsurface contaminants for an ultra-clean finish
  • Exterior surfaces feature a chip-resistant, powder-coated finish



Marks & Listings: CE, UL, ULC

Horizontal Laminar Flow Station
Standard Features
  • A Fluorescent light
    Fluorescent light standard, UV sterilization bulbs available
  • B Fan Filter Units
    HEPA fan/filter units provide laminar flow of micro-filtered air
  • C Minihelic gauge
    Minihelic gauge measures filter backpressure
  • D Stainless steel work surface
    Stainless steel work surface (available with electropolishing)
  • E Variable-speed blower
    Variable-speed blower adjusts air speed to meet containment requirements
  • F Range of Options
    Options include vacuum, DI water and gas utilities
  • H Status Indicator
    Status Indicator

Not Shown: Nylon levelers - Steel-reinforced nylon levelers resist most chemicals

Horizontal Laminar Flow Hoods

  • Horizontal Laminar Flow Hood Smoke Test
  • extra-tall horizontal laminar flow hood with ionizing bars Extra-Tall Horizontal Laminar Flow Hood with Ionizing Bars
  • Custom horizontal laminar flow hood in 316 stainless steel with open interior Custom Horizontal Laminar Flow Hood, 316 Stainless Steel, Open Interior, 120V
  • Horizontal Laminar Flow Hood In Use Horizontal Laminar Flow Station
  • 304SS Smart Whisperflow HLF, 12'W
  • Horizontal Laminar Flow Clean Bench Hood Stainless Steel Smart WhisperFlow Horizontal Laminar Flow Hood

Features and Benefits

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.

Horizontal Laminar Flow Station Airflow Diagram

Multi-speed filter/blower modules provide a continuous wash of HEPA-filtered air for process protection. Internal baffling plates and diffuser panel ensures uniform air speed across work area; make-up air return slots minimize edge turbulence and extend filter life.

Air Return Ducts

For enhanced air-stream control, the flow station features return ducts along the edges of the hood opening. These ducts reduce backwash caused by placing objects near the work surface edge, a common source of turbulence inside a clean bench.

Simple User Interface

Operator controls include the ON/OFF switches, blower speed controls, and a Minihelic™ backpressure gauge for monitoring the load on the HEPA filter. When the backpressure roughly doubles from the initial readings, the filter needs replacing.

GFCI Duplex Outlet for Operational Convenience

A GFCI power receptacle is installed on the right-hand side of the hood interior for operational convenience. GFCI outlets help prevent electric shock and damage to your electrical devices. Alternate mounting locations can be specified at time of order.

HEPA Filter Access Panels

For horizontal laminar flow hoods, the rear vent panel can be easily removed to access the HEPA filters.

Status Indicator Light

The Terra Universal logo incorporates an LED light that functions as a status indicator. The TUI logo will flash when the unit is connected to power, but the blower is switched off. A solid glow indicates the station is fully operational.

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.

WhisperFlow Quiet Operation Reduces Distracting Background Noise

Exposure to loud noises can lower the ability to focus on work and listen selectively, which may also lead to safety issues. Typical AC units can be annoyingly loud, measuring in the range of 70 dB (comparable to a vacuum cleaner). Terra’s WhisperFlow design produces far lower noise levels for a quiet environment comparable to a library. At 90 ft/min output, units measure under 50 dB from only 1 ft away (roughly 75% quieter than 70dB).

Highest Standards For Electronic Components

Terra’s electronic components are designed and built to the highest standards required by defense and semiconductor industries for long-term reliability and protection against damage, injuries, and electrical hazards.

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, 45 years of engineering and application expertise, and our commitment to continuously improve.

Long-Term Customers

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

Complete Project Transparency

Terra is dedicated to complete transparency on project status, shipment tracking, and installation scheduling

ISO 5 Vertical Laminar Flow Clean Bench with Automatic Height Adjusting Table

Automatic height adjusting tables fit perfectly inside free-standing laminar flow clean benches. The separate workstation helps isolate vibration from the fans mounted above the hood. Dual motor electric height adjusting columns beneath the table allow users to quickly raise or lower the work surface without moving equipment off the table.

Catalog of CE-Marked Products

Terra offers over 1,700 CE-marked products configured for international voltage requirements
Popular Accessories
For a full list of accessories, select a product then click Choose Accessories on that product page.
  • UV Germicidal Lamp

    The V-Ray germicidal UV lamp is installed within a Terra hood to inhibit microbial growth on the work surface
  • Utility Valves

    Ball valves (petcocks) are available for utilities such as nitrogen, compressed air, vacuum, DI water, or other process gases. Valves are composed of chrome-plated steel or ABS plastic.
  • Static-Neutralizing Ionizing Bar

    Airflow from the blower distributes positive and negative ions onto the surfaces below, neutralizing static charges that can lead to electro-static discharge and attract particles.
  • Lighthouse Handheld Airborne Particle Counters

    Lightouse portfolio of handheld airborne particle counters ensure accurate readings of cleanrooms and critical environments
  • Work Station Drawers

    Available in ABS plastic or stainless steel, these cleanroom-compatible drawers come in a number of sizes and drawer configurations (6” top drawer and 6” bottom drawer shown).
  • Replacement HEPA and ULPA Filters

    HEPA and ULPA filters compatible with industry standard FFU brands; any size, any brand, any quantity available immediately from stock!
  • Explosion-Proof Power Switches

    UL-rated explosion-proof switches are connected to the lights and blowers using specialized conduit with potted fittings. All electrical components are sealed to eliminate potential ignition points.
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