Oversized Supply Trunks – Air Moves but Comfort Doesn’t

While undersized ducts restrict flow, oversized ducts cause the opposite issue — air moves too slowly and rooms never reach the right temperature.
Chatterbox analyzes airflow velocity and temperature change through multiple branches. When we see air that’s too slow to mix properly, it’s a red flag for oversized trunks or missing balancing dampers.
Correcting this with proper duct sizing or balancing brings even comfort to every room and ensures that conditioned air actually stays conditioned.