Chapter
Cooling Requirements
61
Cooling Requirements
The temperature and humidity specifications shown below are the maximums and standards at which server
cooling parameters have been established.
Temperature and Humidity Specifications
Parameter
Maximum
Non-Operating
Range
Recommended
Operating
Range
Maximum
Operating
Range
Rate Of Change
(per hour)
Temperature
a
a. At altitudes up to 3,000 meters.
-40
o
C to +65
o
C
(-40
o
F to 149
o
F)
20
o
to 25
o
C
(70
o
to 77
o
F)
5
o
C to 35
o
C
(41
o
F to 95
o
F)
10
o
C (50
o
F) R
b
20
o
C (68
o
F) N
c
20
o
F (-7
o
C) R
b
30
o
F (-1
o
C) N
c
b. Repetitive
c. Non-repetitive
Operating
Humidity
5% to 90%,
non-condensing at
25
o
C (77
o
F)
40% - 50%,
non-condensing at
25
o
C (77
o
F)
15% - 80%,
non-condensing
at 25
o
C (77
o
F)
30% RH/hour
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