Auditing Information Systems, Second Edition

7.5. HEATING, VENTILATION, AND COOLING SYSTEMS

Computers survive best in a cool, dry, dust-free environment. Many computers do not require special HVAC equipment. For example, laptop and desktop computers function very well in a typical office or household room. These small computers are cooled by internal fans and do not require any special dust filters. The larger the computer, the more likely it is to require special cooling and dust removal equipment. Large mainframe computers generate significant amounts of heat, thus requiring special air-conditioning systems to maintain temperatures within manufacturer-specified ranges. Many mainfraes also require special dust removal equipment due to the significant amount of air turbulence they create.

The comfort requirements of the people operating the equipment must not be forgotten. Computer rooms should not be so cold that staff members can see their breath and must wear arctic clothing to be able to function. This type of atmosphere can lead to other hazards, for example, space heaters placed on the floor underneath computer consoles to warm the toes of the operators. Unless designed to supply power to a space heater for extended periods of time, the electrical wiring could short circuit and start a fire.

Faulty or poorly maintained ventilation systems can lead to poor health of the staff. Failure to perform routine maintenance of ventilation systems is one of the most commonly overlooked procedures in many companies. Companies ...