Oversized returns shrink noise and pressure; adjusting go back plenums adds to furnace charges but improves airflow

https://postheaven.net/pherahcsbz/understanding-the-full-cost-of-owning-a-new-furnace-over-time-hs9z

Oversized returns scale down noise and stress; adjusting return plenums adds to furnace prices however improves airflow and comfort at cut back fan speeds.