FED-STD-209E September 11, 1992 1. Scope and limitations. 1.1 Scope. This document establishes standard classes, and provides for alternative classes, of air cleanliness for cleanrooms and clean zones based on specified concentrations of airborne particles. It prescribes methods for verifying air

Clean room maintained virtually free of contaminants like dust or bacteria are required for types of laboratory work and in the production of electronic and aerospace equipment precision parts.

FED-STD-209 E Airborne Particulate Cleanliness Classes in Cleanrooms and Cleanzones was a federal standard concerning classification of air cleanliness, intended for use in environments like cleanrooms. The standard based its classifications on the measurement of airborne particles.

The U.S. General Services Administration (GSA) released a Notice of Cancellation for FED-STD-209E, Airborne Particulate Cleanliness Classes in Cleanrooms and Clean Zones, on November 29, 2001. The Federal Standard 209E cancellation is based on the recommendation by IEST Working Group CC100 that FED-STD-209E no longer be maintained.

There is a close correlation between ISO-14644-1 cleanroom classes and FED Std 209E cleanroom classes. The primary difference is ISO-14644-1 lists particles per meter cubed (m 3 ) and Fed Std 209E lists particles per feet cubed (ft 3 ).

FED-STD-209E, FEDERAL STANDARD: AIRBORNE PARTICULATE CLEANLINESS CLASSES IN CLEANROOMS AND CLEAN ZONES (11 SEP 1992) [S/S BY ISO14644-1 AND ISO14644-2]., This document establishes standard classes, and provides for alternative classes, of air cleanliness for cleanrooms and clean zones based on specified concentrations of …

FS209E contains six classes, while the ISO 14644-1 classification system adds two cleaner standards and one dirtier standard (see chart below). The “cleanest” cleanroom in FS209E is referred to as Class 1; the “dirtiest” cleanroom is a class 100,000.

Mar 26, 2025 · This document establishes standard classes, and provides for alternative classes, of air cleanliness for cleanrooms and clean zones based on specified concentrations of airborne particles. It prescribes methods for verifying air cleanliness and requires that a plan be established for monitoring air cleanliness.

The main classification standards for cleanrooms are ISO14644-1:2015, US FED STD 209E and GMP Annex European Community Cleanroom Standards. The level of contamination in each standard is based on the number of particles in a defined particle size range that …

Federal standard 209e and its replacement ISO standard 1446 are the federal guidelines United Maintenance uses for cleanroom construction. Learn more here.