In what type of area is the use of corridors for conveying return air not prohibited?

The use of corridors for conveying return air is not prohibited in dwelling units because these spaces are designed with different ventilation and return air requirements compared to larger or public spaces. In residential settings, corridors can facilitate efficient air circulation and contribute to uniform temperature control and air quality management. The design of dwelling units often includes specific guidelines that allow for the creative use of corridors, ensuring that return air can be effectively managed without compromising safety or air distribution efficiency.

In contrast, public spaces and commercial buildings may have stricter regulations due to the higher occupancy levels and the necessity to maintain clean air standards, along with the associated fire safety considerations. Parks, being outdoor spaces, do not typically involve the concept of indoor air return systems. Therefore, dwelling units represent the environment where returning air through corridors is both practical and acceptable under the applicable code.