Modular Cleanrooms

Modular Cleanrooms

Cleanroom Construction

When looking for modular cleanroom options for your company, you have undoubtedly found the words “Hardwall” and “Softwall” while discussing various cleanrooms. However, what is the difference between the two cleanrooms? And how can you figure out the one that best cleanroom construction meets your needs? Let us examine it. Let us dissect it for you!

Hardwall Cleanrooms

Hardwall cleanrooms have solid walls, though they are more flexible than standard cleanrooms. Hardwall cleanrooms have numerous advantages:

  • Use of existing HVAC: Hardwall cleanrooms can use the existing HVAC of your building while still satisfying the cleanroom requirements. •
  • Assembled equipment: cleanrooms with Hardwall can be built around an installation kit already on the floor or ceiling.
  • Environmental controls: Hardwall cleanrooms provide you with complete control of your cleanroom environment, from static and temperature to particle decontamination, so that you satisfy even the requirements of ISO Class 1.
  • Modifiable: As Hardwall cleanrooms are modular, they are easy to extend or update with changing requirements in your cleanroom.
  • Long-endurance: because Hardwall cleanrooms have a robust frame and ceiling grid, they last long.

Hardwall cleanrooms are ideal for large cleanrooms and conventional cleanroom applications when tight environmental control is required.

Softwall Cleanrooms

Softwall cleanrooms function essentially like a tent; The wall are made of flexible material, unlike traditional walls, and can be freestanding or suspended from your existing structure. Some of the benefits of Softwall cleanrooms include:

  • Affordability: Softwall cleanrooms require minimal materials and are simple in design, making them a budget-friendly option.
  • Customizable: Softwall cleanrooms are super flexible and can easily be customized to your application with the necessary HEPA or ULPA filters or required door type.
  • Versatile: Softwall cleanrooms, whether freestanding or attached to an existing structure, are light and easy to move.
  • Easy to install: Softwall cleanrooms can be installed in just a few hours, with minimal tools
  • Space-saving: Softwall cleanrooms tend to be compact and can fit nearly anywhere.

These attributes make Softwall cleanrooms great for temporary cleanrooms or cleanrooms requiring less stringent classifications, such as storage applications

Types of Air Flow Systems in a Cleanroom

Single-pass Cleanroom

In a clean room with a single pass air flow design, HEPA-filtered air is delivered into the room via fan filtration units (FFUs) from ambient air above the cleanroom ceiling. The atmosphere is expelled via low-wall air grids after passing through the room . This form of architecture does not need individual air handling units or ducts. A slight heating/cooling unit can be ducted to single pass cleanroom to keep operators comfortable with warmer or cooler air throughout the summer and winter months.

Cleanroom Single pass diagram

Recirculating Cleanroom

There are two ways to design such a closed loop system.

  1. The air is recirculated using a dedicated air handling system and ducts. Therefore, the system is coupled with terminal HEPA units installed on the cleanroom ceiling. On the other hand, the air is continuously filtered and circulated. Recirculating systems provide better control of temperature and humidity with higher precision and efficiency.
  2. An additional option for recirculating cleanroom architecture is a ceiling air plenum. The plenum is a gap between two ceilings where the air is circulated via recirculation and conditioning (with an air handler unit). The fan filters are then filtered into the cleanroom (FFUs). The atmosphere is cycled in the room by low wall air chases and returned to the plenum, once again routed through the FFUs. This can be a possible if the cleanroom ceiling is supported by a steel structure constructed for this purpose.
Cleanroom air recirculating

Negative Pressure Cleanroom

In a negative air pressure cleanroom, the air pressure in the cleanroom is lower than the pressure outside of the room to avoid any contamination escaping from the cleanroom.

usually air enters to the room through wall filters near the floor, and then is directed out through filters in the room ceiling where the fan filters (FFUs) are located.

Negative air pressure cleanrooms are used in  pharmaceutical compounding of hazardous drugs,  biochemical testing, and also in hospitals to quarantine patients with contagious disease.

Cleanroom Negative pressure

Ezad Cleanroom is a division of Ezad Lab Furnishing Inc. Reliable USA-based laboratory manufacture providing laboratories with high-quality equipment since 2000 at affordable prices.