Definition
A heating or cooling system using a furnace or heat pump to condition air and a blower fan to force air through ductwork. Forced air is the most common system type.
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Forced air systems heat or cool air centrally and distribute it throughout the home via ductwork and registers. They provide rapid temperature changes and can include air filtration, humidity control, and ventilation. Ductwork quality affects efficiency and comfort. Common problems include leaky ducts, inadequate insulation, and dirty filters reducing airflow. Inspectors assess ductwork visibility, condition, sealing, and insulation.
Pro Tip
Ensure forced air ductwork is properly insulated, particularly in unconditioned spaces.
Example
A home with forced air HVAC had poorly insulated ductwork in an unconditioned attic, losing significant conditioned air. Insulating ducts with R-8 insulation improved comfort and reduced energy bills.