How many filters should I install in my cleanroom?
February 2, 2012 by Renzo HEPA & ULPA filters used in most stringent cleanrooms are generally built in ceiling and can be installed in groups housed in a proprietary modular pressure plenum system. They can also be installed in single filter housings, individually ducted, suspended in an inverted “T” grid support system, and sealed to prevent unfiltered bypass air from entering the cleanroom. Cleanroom design conventionally follows the following guidelines for filter coverage.
|
ISO Class |
Fed 208 |
Controls |
HEPA Coverage as % of Ceiling |
|
1 |
– | Stringent | 100 |
|
2 |
– | Stringent | 100 |
|
3 |
1 | Stringent | 100 |
|
4 |
10 | Stringent | 100 |
|
5 |
100 | Stringent | 100 |
|
6 |
1,000 | Intermediate | 33 – 40 |
|
7 |
10,000 | Intermediate | 10 – 15 |
|
8 |
100,000 | Less Stringent | 05 -10 |