|  | 8.4 | Planning Structured Cabling: Selection Practice
| 8.4.5 | Closet D
Also centrally located, room D is slightly larger than room C. Its dimensions are approximately 2.4 m wide x 3 m deep. In addition, room D is near the POP. The room does not have a dropped ceiling. A heating and cooling duct that passes through the top of the room is also vented into the room. Temperatures inside the room are controlled by a thermostat that is located just inside the door. The exit door swings outward, and is 2.4 m wide. The floor is covered with ceramic tiles. Lighting is provided by an incandescent lighting fixture in the ceiling. The light switch that turns the light on and off is located just outside the door. There are eight electrical outlets in the room, two along each wall. The walls are of concrete block construction and are painted with a fire-retardant paint. Currently, the room is used to store extra office equipment, and is kept locked. The door can only be unlocked from outside the room.