Added "It is important to consider the direction of the fan and whether or not the fan is intaking air or exhausting air. It is typical to place exhaust fans towards the top of the case as hot air rises, and intake fans towards the bottom of the case as cool air sinks.
- changed "you extend the life" to "extends the life"
- changed "there be at least two fans" to "there should be at least two fans"
- changed "Locate the computer where it is neutral to the rooms environmental registers." to " Place the computer in a neutral location away from the rooms environmental registers."
- changed "Locate the computer away from" to "Keep the computer away from"
- changed "airflow" to "air flow"
