On a survey of one of your client's buildings, you discover that one of the TRs, housing a considerable quantity of switching equipment, is at 25 degrees C (77 degrees F) with a relative humidity of 59 percent. This is considered to be:
A.
Within the normal range of temperature and humidity
TDMM 14
pg 3-6: "Maintain a temperature and humidity level to the intake of IT equipment as recommended by the manufacturer of the specified equipment and ASHRAE or other relevant standards."
pg 19-3: "Reliable cooling and heating shall be provided 24 hours a day, 365 days a year. Temperature and humidity in the Technology Equipment Center (TEC) shall be controlled to an operating range of 18 to 24°C (64 to 75 °F) with 30 to 55 percent relative humidity."
TDMM page 3-56 (329) Table 3.5 Enviromental control systems standards for Equipment Rooms. The recommended temperature range listed is ~18 degrees to ~27 degrees celsius (64F-81F). Sixty percent relativity humidity is maximum with a dew point range of ~5.5 degrees celsius (15F) (range 42F-59F)
TDMM page 19-4 (1456) Temperature and humidity in the TDR shall be controlled to an operating range of 18 to 24 degrees celsius (64F-75F) with 30 to 55 percent relativity humidity.
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