Why is it important to maintain positive pressure in hallways and stairwells?

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Maintaining positive pressure in hallways and stairwells is crucial for ensuring safety during emergencies, particularly in the event of a fire. Positive pressure helps to keep smoke and harmful gases from infiltrating these areas, which are key escape routes for occupants. By preventing smoke from spreading, it allows for safer egress, improving the chances of individuals escaping without being impeded by hazardous conditions. This pressure management is an essential part of fire protection systems in buildings, ensuring that designated pathways remain clear and accessible during an emergency.

Other options may seem relevant, but they do not address the primary safety concern that arises in emergency situations. For instance, while aesthetic appeal might be a consideration in building design, it does not relate to the critical function of fire safety. Similarly, while reducing heating costs and improving air quality are important HVAC considerations, they do not directly connect to the specific need for maintaining a clear escape route in a fire scenario. Thus, the focus on safety through positive pressure aligns directly with the need for effective emergency response strategies.

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