Supermicro SuperServer SYS-122H-TN User Manual page 243

SuperServer SYS-122H-TN: Particulate and Gaseous Contamination Limits
Particulate and Gaseous Contamination Limits
Data centers should meet the following requirements to maintain proper air quality.
Particulate Contamination Specifications
All sources of dust inside data centers should be reduced or eliminated. Dust having a
deliquescent relative humidity of less than the maximum allowable relative humidity should be
filtered out.
The cleanliness of data centers must adhere to ISO Standard 14644-1 Class 8 (ISO 2015) to
be within 95% of the levels specified below:
1. Each cubic meter of air should contain no more than 3,520,000 particles that are equal to
or greater than 0.5 μm in diameter.
2. Each cubic meter of air should contain no more than 832,000 particles that are equal to
or greater than 1 μm in diameter.
3. Each cubic meter of air should contain no more than 29,300 particles that are equal to or
greater than 5 μm in diameter.
This level of cleanliness can generally be achieved by an appropriate filtration scheme as
outlined below:
1. The room air should be continuously filtered with MERV 8 filters, as recommended by
AHRI Standard 1360 (2017).
2. The air entering the data center should be filtered with MERV 11 to MERV 13 filters.
Gaseous Contamination Specifications
The total gaseous contamination, i.e., copper and silver corrosion rates, should not exceed
ANSI/ISA Standard 71.04-2013, severity level G1 (mild) as described below:
1. A copper reactivity rate of less than 300 Å/month.
2. A silver reactivity rate of less than 200 Å/month.
Appendix D:
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