Airflow Basics
Give the Return-Air Grille Space to Breathe
Before changing thermostat settings, check whether furniture or stored items are obstructing a return-air grille and document persistent comfort problems.
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return air
Airflow and comfort
The Door Under Your Room Can Affect the Air You Feel
Understand how a closed interior door can affect a ducted HVAC system’s return-air path, and prepare useful observations for a professional assessment.