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Softwall Modular Cleanrooms

Softwall Modular Cleanroom
Need it fast? Check out Terra's ValuLine™ Softwall Cleanroom: the low-cost, quick-ship alternative!

Features Key

A Status Indicator Lights: Glow to indicate FFUs are operational; flash when FFUs are off
B Select HEPA or ULPA fan/filter units to provide a laminar flow of clean air
C Fluorescent lights (teardrop fixtures available for mounting between fan/filter units)
D Control panel includes FFU and light controls
E Cleanroom vinyl curtains
F Parting strip shields provide easy access
G Steel supports require no external bracing
  Options include Night Service switch, casters, vacuum, DI water and gas utilities

Client List for Terra Modular Cleanrooms
canada and us Ul logo
See Below

Softwall Modular Cleanrooms provide an economical, versatile solution to clean manufacturing requirements in semiconductor, medical device, and many other industries. Portable, expandable, and easy to assemble/disassemble, these cleanrooms are also available on an accelerated delivery program to meet your tight production schedule!

Unlike other softwall modular cleanrooms on the market which require complex suspended ceiling supports, Terra cleanrooms are completely free-standing structures.

Use the catalog numbers below to specify a cleanroom with a powder-coated steel or 304 stainless steel frame. Then based on your desired floor plan, a Terra application specialist will quote you on a room configured for your appllcation. Components include Panels, Strip Shields, Strip Doors, and Filter/Fan Modules, as well as accessories and options.

Declaration of UL Listing
Includes declaration of system listing under UL File E472687, including all high-voltage Modular Cleanroom electrical components integrated into Power Distribution System (Terra Nos. 6600-29B-P, 6600-29B-S, 6600-29B-B, 6600-29B-P-220, 6600-29B-S-220, 6600-29B-S-220, 6600-27, 6600-27-220 and ValuLine variations). UL listing helps meet municipal and other permitting requirements that may apply while ensuring the safety and integrity of electrical components.
Cat. # Price
6600-33 call TUI

control panel
Control Panel
Cleanroom Status Indicator
Status Light
  Softwall Cleanroom Control Panel with Operation Status System
Mounted to the right of the access door, this panel allows convenient control of filter/fan units, lights, ionizing modules, and other environmental monitoring equipment selected for your softwall modular cleanroom. Fabricated of stainless steel. Includes a status indicator light in each corner, which glows when Fan Filter Units are operating.

  Cat. # Price
Control Panel with Operation Status System 6600-25 Call TUI

Softwall Cleanroom Support Frame

softwall cleanroom screen frame
The support frame is fabricated of interlocking 2.5" (64 mm) powder-coated square steel uprights, cross sections, and ceiling members. Ceiling members are connected to steel T-bars, forming the 2' x 4' (610 mm x 1219 mm) bays that support filters and lights. Corner reinforcement gussets ensure a rigid structure. Optional heavy-duty casters allow easy repositioning after installation. Standard height is 7' (2134 mm) measured from filter face to floor (8' 3", 2530 mm, overall), allowing installation below a standard 9' (2743 mm) ceiling. Includes a control panel for operation of filter/fan units, lights, and other selected options.

Note: Walls over 8' (2438 mm) long require an additional vertical support member.

Application Alert!
Because of their panel design, softwall cleanrooms cannot control pressure, humidity or temperature levels inside the enclosure, making them unsuitable for many requirements, including many ISO 5 applications. They are also more difficult to clean than other designs.

If pressure, humidity and/or temperature control or frequent cleaning/sterilization is required, select one of these room designs:
Hardwall Cleanroom BioSafe® Steel Cleanroom
BioSafe® FRP/C-PVE Cleanroom EZ-UP Cleanroom™

  Cat. # Price
Powder-Coated Steel 6600-60 call TUI
304 Stainless Steel   6600-61 Call TUI

Softwall Cleanroom Panels & Strip Shields

Softwall panels are fabricated of heavy-duty, blur-free 40 mil material—double the industry standard—ensuring enhanced tear resistance and eliminating the need for unsightly sewn sash weights. Strip shields, made of 60-mil material, come standard in 8" (203 mm) widths, with 2" (51 mm) overlap, for easy entrance or exiting. Polyurethane shields are 12" (305 mm) W, 40 mil thick.

Panels and strips are available in three materials, in either clear or frosted appearance. Click here for ordering information.

  • Static-Dissipative Vinyl is manufactured with permanent built-in static inhibitors that, unlike topical treatments, will not wear off.
  • Non-outgassing Panels are made from inherently static-dissipative polyurethane that provides permanent, humidity-independent ESD protection for sensitive manufacturing conditions. Polyurethane contains no plasticizer, making it virtually non-outgassing.

Softwall cleanroom panels and strip shields attach to the support frame by means of a noncontaminating mounting system. Other mounting systems are available.

Note: Softwall cleanroom panels are notched to ensure a snug fit at all corners. In standard installations, panels are supplied in lengths of four feet. Where two panels meet, the panels overlap by 6" (152 mm). To prevent personnel from parting panels at these seams, order optional panel seaming, Dual-Lock, magnetic closures, or attachment clips below.

caster curtain gapDetermining the Gap between Panel or Strip Shields and Floor

All softwall cleanrooms require some gap between the panel and the floor to allow air to escape. If this gap is too small to accommodate the flow of air generated by the ceiling filter fans, then panels and strips will billow outward. If it is too large, the cleanroom will not maintain adequate positive pressure.

In general, the formula to determine the gap is:
Gap in Feet = (Number of FFUs * 8 sq. ft. (0.74 m2) / Room Perimeter

Example: Take a clean room 16’ x 16’ x 7’ (4877 mm x 4877 mm x 2134 mm) high with 7 FFUs. The FFU surface area is 56 sq. ft. (5.2 m2), 7 FFUs * 8 sq. ft. (0.74 m2). The room perimeter is 64 feet (20 m) 16 ft.(4877 mm)* 4 (1219 mm). The gap is .875’ (27 mm) . 56 sq. ft./64 ft. (5.2 m2/ 19.5 m), or about 10" (254 mm). Order panels or strip shields 6 ft.(1829 mm) long. See ordering chart.

Selecting the Proper Panel and Strip Shields Height
The above example show exactly the gap produced when a 6' (1829 mm) curtain is installed on a standard cleanroom frame, since the curtain bead is mounted about 1.5" (38 mm) below the filter face (6'10.5", 2096 mm, above the floor). If the same cleanroom included casters, which raise the cleanroom about 6" (152 mm), then a 6'6" (2012 mm) curtain would be appropriate.

Various standard panel heights are available on ordering charts. Terra's specialists will be happy to calculate gap, panel and strip heights for you. The material can easily be cut to exact lengths for your application.

Softwall Cleanroom Strip Shield Doors

Strip shields can be ordered in convenient widths to create access doors for softwall or hardwall cleanrooms. By alternating strips of clear vinyl with frosted vinyl, you eliminate both sticking and air gaps, creating entrances that are cleaner and easier to walk through.

Note: Strip Shield doors are free-hanging—standard installations do not include attachment of the two sides to adjacent panels or frame.

Softwall Cleanroom Filter Fan Configurations

Recommended Filter/Fan Configurations
No. of
No. of Filter Modules to meet
Fed Std 209 Class Standards
1 10 100 1,000
8 x 8
(2438 x 2438)
8 5 -8 4 - 8 3 - 6 2 - 3
8 x 12
(2438 x 3658)
12 7 - 12 6 - 12 4 - 8 3 - 5
8 x 16
(2438 x 4877)
16 10 - 16 8 - 16 6 - 11 4 - 6
12 x 12
(3658 x 3658)
18 11 - 18 9 - 18 6 - 13 5 - 7
12 x 16
(3658 x 4877)
24 14 - 24 12 - 24 8 - 17 6 - 10
16 x 16
(4877 x 4877)
32 19 - 32 16 - 32 11 - 22 8 - 13
20 x 20
(6096 x 6096)
50 30 - 50 25 - 50 18 - 35 13 - 20
Night Service Switch
  • Energy-saving mode saves 25% of fan operating costs by reducing power consumption during off-hours
  • Maintains round-the-clock cleanroom integrity at lower cost
  • Easy to activate via panel-mounted switch (Wireless Cleanroom Control System also available)

Why Pay More for Less?
Terra cleanrooms are designed to meet a specified ISO cleanliness rating when a cleanroom is in use: with operations in progress, process machinery humming, and personnel in motion. So why pay to maintain that level of FFU performance when a production shift ends and people, the greatest source of contamination, leave the room?

With a greatly reduced contaminant load, a cleanroom at rest maintains its target ISO cleanliness standard with much less airflow, fewer air changes—and decreased power consumption. Terra’s Night Service Switch provides this cleanliness at a nominal cost, giving you immediate cost savings.

Simply select the “Night Service” Switch when you turn off the lights and go home. A separate operation circuit drops all Fan/Filter Units (FFUs) into low-energy operation mode, shaving 25% of energy costs off your power bill while maintaining uninterrupted cleanroom performance at your specified cleanliness level. With Terra's Night Service Switch, operators can save up to 7,000 kilowatt-hours per year with a return on investment in slightly over a year.**
Ordering Information
A complete system includes fan/filter units and Terra's standard Power Distribution Modules (order separately), in addition to the units specified below. The Night Service Switch includes electronic configuration of each FFU controlled by this system. The Control Panel includes switch settings and indicator lights for Normal Mode and Night Service Mode, as well as a tamper-resistant master FFU Off switch.
Night Service Switch
Order one per Fan Filter Unit Cat. # Price
120VAC, 60Hz 6601-70 $ 120
Control Panel for Night Service Switch
Order one per Cleanroom Cat. # Price
120VAC, 60Hz 6600-25-NS $ 1,906
220VAC, 60Hz 6600-25-NS-220 $ 1,906
Comparative Specifications:
2’ x 4’ (600 x 1210 mm) Terra Fan/Filter Unit No. 6601-24-H, operating at High, Medium, and Night Service setting
Operation Setting: High Speed* Medium Speed* Night Service
Airflow: cfm (m^3/hr) 808 (1373) 717 (1218) 654 CFM (1111)
Air Speed: ft/m (m/s) 115 (.58) 102 (.51) 93 ft/min (.47)
Run Amps (Watts): 4.3 (512) 3.5 (416) 3.3A (393W)*
*25% savings over operation on high speed
**Based off of an average-sized cleanroom with 10 FFU's, active cleanroom usage of 8 hours per day, and the U.S. Energy Information Administration's given average retail price of electricity at 10.72 cents per kilowatt-hour.

Softwall Cleanroom Accessories

cleanroom quickquote

Softwall Cleanroom Options

wheel caster
6" (152 mm) -diameter locking caster
  Cleanroom Casters
Stainless steel swivel casters feature nonshedding polyurethane wheels. Capacity: 300 lbs. (136 kg.) each. Order one per vertical post. Price includes installation. Casters raise the frame 7.125" (181 mm). If casters are ordered, the frame will be made shorter to keep the floor to filter face dimension to specification.
CAUTION: Casters are intended to allow movement only on smooth floors and require that personnel support each cleanroom upright during motion.
Cat. # Price
6704-08 $ 183
  Dual-Lock Strips
For sealing panels or strip shields to frame supports or overlap areas, Terra offers non-particulating, clear 3M Dual-Lock with plasticizer-resistant adhesive. These strips are ideal for application along the vertical frame uprights or along the vertical length of a panel or strip, allowing corner or overlap attachment that minimizes air leaks. Price includes sewing of mating strips to specified panels. Use quantity to specify desired number of feet (increments of 305 mm).
Cat. # Price
6704-05 $ 13
    Flexible Magnet Strip Self-Closures
Flexible, chemical-resistant magnet strips are ideal for a variety of custom closure needs. Price includes sewing to specified panel. Use quantity to specify desired number of feet (increments of 305 mm).
Cat. # Price
6704-06 $ 16
    Snap-Tite™ Clips
Ideal for securing two panels together. Each two-piece plastic clip snaps together through a hole in the panels.
Cat. # Price
6704-07 $ 2

File Type File Name Publication Date
Tech Resource (PDF) Calculating Clean Room Cleanliness: How many FFUs and Lights?
This tutorial provides practical tips for correlating the desired cleanliness level (per ISO/FS209 standards) to the required number of fan/filter units (FFUs). Also provides guidelines for specifying lights based on the type of operations being conducted.
FAQs (PDF) Frequently Asked Questions about Cleanrooms
Answers to both basic cleanroom questions as well as specific inquiries about Terra-made rooms. Useful insight for people with a new cleanroom, or thinking about ordering one.
Manual (PDF) Softwall Cleanroom: Doc. # 1800-31
Assembly and cleaning for modular softwall cleanrooms are different from hardwall rooms. See the details in this manual, and learn how to properly install vinyl strips/panels to achieve the best airflow conditions, and how best to clean them.
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