What restriction applies to positively pressurized pipe installations?

The restriction that positively pressurized pipe installations shall not pass through conditioned space within a building is essential for maintaining the integrity and safety of the indoor environment. Conditioned spaces are areas that are heated or cooled; therefore, any pressurized pipe that could potentially leak or discharge water vapor can introduce moisture into these spaces, leading to problems such as mold growth or deterioration of building materials.

In many building codes and guidelines, maintaining appropriate humidity levels and preventing moisture intrusion is paramount for both structural integrity and occupant health. By restricting positively pressurized pipes from traversing these conditioned areas, the risk of moisture-related issues is significantly reduced, ensuring that the indoor air quality remains high and the environment is comfortable and safe.

The other options suggest scenarios that could potentially compromise the building’s air quality or structural integrity, such as allowing installations in any part of the building or specifically within conditioned spaces. Therefore, the focus on avoiding conditioned areas is crucial for responsible and effective building practices concerning positively pressurized installations.