Supermicro SuperServer SYS-621H-TN12R User Manual page 24

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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:
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The room air should be continuously filtered with MERV 8 filters, as recommended by
AHRI Standard 1360 (2017).
•
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:
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A copper reactivity rate of less than 300 Å/month.
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A silver reactivity rate of less than 200 Å/month.
Chapter 2: Server Installation
24