Temperature And Humidity Recommendations For Computer Rooms; Table 4.1 Recommended Temperatures And Humidities For Computer Rooms - Fujitsu M10 Series Installation Planning Manual

CHAPTER 4 Air Conditioning

Table 4.1 Recommended temperatures and humidities for computer rooms

Near the underfloor air outlet Detection and regulation point
Air
Temperature
conditioning
setup

Direct
blowing or
duct blowing
181 C 642 F 655%
Underfloor
ventilation
181 C 642 F 655%
Combined
direct
blowing or
duct blowing
and
underfloor
ventilation
4.3.3 Temperature and humidity recommendations for computer
rooms
Practical temperature and humidity recommendations that apply to changing the room
temperature from the basic recommendations or to lowering the underfloor
temperature in unattended areas where paper is not used are explained below.
(1) Changing the room temperature
Before changing the room temperature of a computer room from the basic
recommendations consider the following:
 Keep the room humidity constant when direct blowing or duct blowing is used.
 If underfloor ventilation and room air conditioning is combined, keep the absolute
temperature, which is a measure of the water content of the room air, equivalent to
a temperature of 24C (75F) and a humidity of 45%. Do not change the flow rate
even if the underfloor temperature is changed.
Table 4.2
apply to changing the temperature from the basic recommendations.
40
Humidity %
C F
 
summarizes the practical temperature and humidity recommendations that
Temperature
Humidity %
C
F
24 2 C 754F
455%
Targeted Targeted About 45%
at at at 24C
24 C
75F (75F)
24 2 C 754F
455%
Remarks

The
temperature
and
humidity
depend on
the thermal
load.

C120-H007-08EN