Experiencing one side of your residential home getting significantly hotter than the other is typically driven by solar heat gain, building orientation, and unbalanced HVAC airflow distribution. Rooms located on the west or south sides of a house absorb intense, direct afternoon sunlight through windows, warming up glass and walls faster than shaded north-facing rooms. Additionally, if your ductwork has unsealed joints, crushed flexible runs, or closed balancing dampers on one side of the house, those rooms will be starved of chilled supply air. You can troubleshoot by measuring temperatures and checking vent velocity. You can verify that your cooling strategy is working when adding reflective window films, upgrading insulation, and adjusting duct balancing dampers successfully equalizes temperatures across all rooms.
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