Where are return air openings typically located in air distribution systems?

Return air openings are typically located on inner walls in air distribution systems because this positioning allows for effective circulation of air within the conditioned space. By placing return vents on inner walls, the system can draw air from the entire room, promoting a more even temperature distribution and ensuring that heated or cooled air circulates effectively back to the air handling unit. This placement helps to minimize dead spots in air flow and enhances the overall efficiency of the heating and cooling process.

Using inner walls for return air openings also limits the disturbance from external elements, such as drafts from windows or doors that could otherwise affect the system's performance. Proper location of return air openings is crucial for maintaining indoor air quality and comfort levels throughout the space.