Technical Requirements -
Telephone/Data Spaces & Cable Pathways
C. Overhead Lighting
Install sufficient overhead lighting fixtures to provide 50 foot candles of
illumination at the consoles without glare or shadows.
Environmental Conditions
1. Telephone Equipment Room
A. Minimum Cooling Requirements:
Number Of Lines
BTU's
Room Size
100-899
20,000
500 sq. ft.
900-1599
30,000
700 sq. ft.
1600-1999
40,000
900 sq. ft.
2000-2399
50,000
1100 sq. ft.
2400-2799
70,000
1300 sq. ft.
2800-3199
90,000
1500 sq. ft.
3200-3999
110,000
1700 sq. ft.
B. Telephone Equipment and Console rooms shall be equipped with circulation
and heating/cooling equipment capable of maintaining the space between
60 and 80 degrees Fahrenheit, with humidity control. The relative humidity
should not exceed 50%. Heating and cooling requirements shall also include
the heat dissipation of the back-up batteries and associated rectifiers.
C. The HVAC equipment shall be stand-alone in design and accommodate a
twenty-four hour, seven days a week, year-around operation.
D. For raised flooring (computer flooring), every third tile shall be vented to
accommodate HVAC equipment.
E. If the Telephone Equipment Room is adjacent to the computer room, the
computer room air conditioner should be utilized to cool the equipment room
if this is possible and sufficient capacity exits.
2. Telephone/Data Closets
A. Active heat producing equipment will be housed within these closets. A
sufficient number of air changes should be provided to dissipate sensible
heat. A positive pressure shall be maintained with a minimum of one air
change per hour.
B. HVAC shall be included in the design of the telephone/data closets to
maintain a temperature the same as the adjacent office area. At a minimum,
Page 4-30
VBA Design Guide
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