Where is the best location for return air grills in a residential HVAC system?

The optimal placement for return air grills in a residential HVAC system is on interior walls out of drafts. This location allows for better air circulation within the home, ensuring that the HVAC system operates efficiently. When return air grills are positioned away from drafts, they can effectively pull in the return air without being influenced by external temperature changes that might occur near windows or exterior walls.

Additionally, placing them on interior walls helps maintain stable air pressure throughout the system, allowing for consistent airflow and temperature control in different areas of the home. Effective return air placement is crucial for balancing air distribution and improving overall system performance, contributing to a comfortable living environment.