Dell EMC PowerEdge T40 Technical Specifications Guide

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Particulate and gaseous contamination specifications

Table 1. Particulate contamination specificationsThe following table shows the particulate contamination specifications:
Particulate contamination	Specifications
Air filtration	Data center air filtration as defined by ISO Class 8 per ISO 14644-1 with a 95% upper confidence limit.
NOTE This condition applies only to data center environments. Air filtration requirements do not apply to IT equipment designed to be used outside a data center, in environments such as an office or factory floor.
NOTE Air entering the data center must have MERV11 or MERV13 filtration.
Conductive dust	Air must be free of conductive dust, zinc whiskers, or other conductive particles.
NOTE This condition applies to data center and non-data center environments.
Corrosive dust	Air must be free of corrosive dust.
Residual dust present in the air must have a deliquescent point less than 60% relative humidity.
NOTE This condition applies to data center and non-data center environments.

Table 2. Gaseous contamination specificationsThe following table shows the gaseous contamination specifications:
Gaseous contamination	Specifications
Copper coupon corrosion rate	<300 Å/month per Class G1 as defined by ANSI/ISA71.04-2013
Silver coupon corrosion rate	<200 Å/month per Class G1 as defined by ANSI/ISA71.04-2013
NOTE Maximum corrosive contaminant levels measured at ≤50% relative humidity.