How Are Cleanroom Standards Determined?

The number and size of particles allowed in the room determines the classification of air cleanliness.

Guidelines For Selecting Filters

Our staff will make the calculations necessary to achieve the desired ISO or U.S. Federal Standard 209 Class. The correct quantity of HEPA or ULPA grade filters will be selected using air changes per hour as the most effective method for meeting class requirements.

Installation, Testing and Certification

A network of Authorized Installers enables Clean Rooms International to offer complete installation services. Testing and certification by an independent contractor can be arranged as well.

Whether you choose to install a room yourself or use a CRI Authorized Installer, our staff serves as a liaison and guides the construction or installation process.

Accelerated Depreciation

Conventional construction becomes a permanent part of the host building and requires the straight-line method of depreciation over as long as 39 years, depending upon current law. A shorter depreciation life for the modular cleanroom results in a quicker write-off and faster payback for the cost of the room.

Modular cleanrooms built from our Legend Cleanroom System can qualify for accelerated depreciation vs. conventional construction. Consult with your accountant to determine if favorable depreciation rules apply to your purchase of a Legend Cleanroom System.

Airborne Contaminant Sizes