Hardwall Cleanrooms

Hardwall Cleanrooms

Our modular hardwall cleanrooms provide a clean, protected, and structured environment, without the need for internal bracing or ceiling supports, unlike other modular structures. We have many different modular cleanroom options to suit your needs. All our cleanroom components are prefabricated and 100% modular in design. Our modular cleanrooms can be installed by the end user, or by our factory trained technicians, whichever you prefer.

Our standard hardwall cleanroom systems utilize a panelized wall structure that supports the roof and ceiling grid. Filtered air is provided by ceiling-mounted, self-powered filter units which draw outside air through a pre-filter, which then feeds to a HEPA filter, and into the hardwall modular cleanroom. Filtered air is then exhausted from the hardwall modular cleanroom via adjustable near floor level exhaust vents. Cleanliness levels will vary depending the cleanroom classification, the quantity and configuration of filters, and the industry requirements.

Hardwall Modular Cleanroom Benefits

Our factory prefabricated hardwall cleanrooms offer a variety of benefits to improve your overall cleanroom needs, some of which include:

  • Flexibility
  • Future expansion and upgrades
  • Easy relocation capabilities
  • Permitting available in all 50 states
  • Less expensive than standard sheetrock
  • Less disruptive to day-to-day operations
  • Quick expert installation, usually in just a few days (if needed)
  • Environmental control system implementation (existing HVAC systems can be incorporated in some cases)

In addition, our hardwall modular cleanroom systems come factory supplied with pre-wired, UL-classified raceways. These built-in raceways provide a flush interior surface for electrical outlets and phone/data wiring. This eliminates the mess of cutting and sanding drywall onsite and minimizes construction time and facility disruption. Our raceway extrusion can also be used as a service chase for water, compressed air, etc.

Contact us for more information on our modular cleanrooms, request a hardwall cleanroom quote, or call us at 800-959-0878 do discuss your cleanroom project requirements today.

Modular Hardwall Cleanroom Construction

CBU provides a wide variety of material and finish options for your hardwall cleanroom needs. These options are based on a 4” thick panelized wall system that is supported by a series of clear anodized aluminum extrusions. The standard panels for our modular hardwall cleanrooms are double-faced vinyl wrapped with gypsum on both sides. Panel sizes are nominal 4’ wide with heights from 8’ and higher. Some of the material and finish options available for our hardwall cleanrooms, include:

  • Standard Vinyl – Our standard vinyl in non-shedding, easy-to-clean, and is ideal for most hardwall modular cleanrooms.
  • FRP (fiberglass reinforced plastic) – Chemical-resistant FRP finish is better suited for pharmaceutical modular cleanroom applications or other environments where microbials may be present.
  • Aluminum Clad – Aluminum clad wall finishes are perfect for hardwall modular cleanroom applications involving human tissues, or implantable medical devices, due to aluminum’s natural ability to reduce the presence and/or growth of microorganisms.

Additionally, our modular cleanroom doors and windows are pre-hung for quick and easy installation. For improved look and performance our return air cutouts are framed in aluminum extrusions, and all our electrical is concealed inside wall post cavities for outlets, light switches, conduits, etc.

Modular Hardwall Cleanroom

Hardwall Modular Cleanroom Ceiling & Roof System

Our modular cleanrooms provide heavy duty steel hardwall construction that features a T-grid with a 2’ by 4’ pattern support filters, light fixtures, and cleanroom tiles. Gasketing material is also included with our 1.50” hardwall modular cleanroom T-bar systems. Our hardwall cleanroom ceiling grids are supported by a corrugated steel deck, panel roof, or structural steel supports for gaps greater than 20’. In addition, our aluminum T-grid and gel grid ceiling systems are available for special applications.



Hardwall Cleanroom Filtration Systems

With a variety of cleanroom airflow designs available, our hardwall cleanroom air filtration systems are designed to meet ISO 14644-1. We also feature single pass or recirculating systems with unidirectional or non-directional airflow patterns. Filtration levels from Class 100,000 (ISO Level 8) to Class 100 (ISO level 5) are also available.

Our standard hardwall modular cleanroom filtration units are 2’ x 4’. The self-powered HEPA filters, provide 99.99 percent filtration at 0.3 microns efficiency, with a 30 percent pleated disposable pre-filter. The internal fans include backward incline impellers with direct drive motors, which are statically balanced, and require 115V-4.1A-1Ph-60Hz of power, or an 11V-1A 1ph 60 Hz power option.

Modular Hardwall Cleanroom

Hardwall Cleanroom Single Pass Filtration SystemsHardwall Cleanroom Recirculating Filtration System


ISO 14644-1 Cleanroom Standards

Class US FED STD 209E
Maximum Particles/ft³
ISO equivalent
>0.1 um >0.2 um >0.3 um >0.5 um >5 um
100       100   ISO5
1000       1000 7 ISO6
10,000       10,000 70 ISO7
100,000       100,000 700 ISO8


Class Maximum
FED STD 209E equivalent
ISO 5 100,000 23,7000 102,000 3,520 8,320 293 Class 100
ISO 6 1,000,000 237,000 102,000 35,200 8,320 2,930 Class1,000
ISO 7       352,000 83,200 2,930 Class 10,000
ISO 8       3,520,000 832,000 29,300 Class 100,000
ISO 9       35,200,000 8,320,000 293,000 Room Air w/Merv Filter


Criteria Class 100
Class 1000
Class 10,000
Class 100,000
Air changes per HR/Min 300 to 480 / 5 to 8 180 / 3 60 /1 20 /0.33
Filter coverage % 60 – 70 20 – 30 7 – 15 4 – 5
CFM per square foot 36 – 65 18 – 32 9 – 16 4 – 8
Filter Efficiency 99.997% HEPAs 99.997% HEPAs 99.997% HEPAs 99.97% HEPAs
Ceiling Type 1.50″ Gasketed Grid 1.50″ Gasketed Grid 1.50″ Gasketed Grid 1″ T-Bar Grid (Gasket Optional)
Light Fixture type Tear drop or 2’x4’ cleanroom fixture 2’x4’ cleanroom fixture 2’x4’ cleanroom fixture 2’x4’ standard fixture
Ceiling Panel FRP, Vinyl rock or Mylar Vinyl rock or Mylar Vinyl rock or Mylar Vinyl rock or Mylar
Wall System Modular Modular Modular Modular
Flooring cover Welded sheet vinyl or Epoxy Welded Sheet vinyl or Epoxy Sheet vinyl or VCT Sheet vinyl or VCT
Flooring base Cove or Aluminum base channel Cove or Aluminum base channel Cove or Aluminum base channel Cove or Aluminum base channel
Air Returns Low wall on long axis Low wall at perimeter Low wall Low wall or ceiling

Modular Hardwall Cleanroom Options

CBU’s modular cleanrooms offer a wide variety of optional cleanroom design components, some of which include:

  • Anterooms/gowning rooms
  • Air Showers
  • Pass-through chambers (wall & floor mount)
  • ESD walls, ceilings & floors
  • Raised access floors
  • Epoxy, VCT and seamless coved sheet flooring
  • Single, double and sliding doors
  • Windows
  • Cleanroom tables & other furnishings
  • Amber-colored (UV) lights & windows
  • Magnehelic pressure gauges
  • HEPA control systems (automated)
  • High-Speed roll-up doors
  • Mezzanines
  • Wiring systems
  • Factory Installation
  • Certification & Balancing
  • Mechanical Engineering
  • Permitting

Contact Us for Hardwall Cleanroom and Cleanroom Systems

Contact us for more information on our hardwall cleanroom solutions, Request a Quote, or call us at 800-959-0878 to discuss your cleanroom project needs.