Insulated residential ductwork in an attic

Ductwork and airflow

Conditioned air must reach the room.

Weak vents and uneven temperatures can involve return air, supply ducts, restrictions, leakage, insulation or balancing.

The air-delivery path

Air leaves the room, passes through the system and returns conditioned.

Return airHVAC systemSupply ductsRoomsPossible leakageBalancingRestriction

What changes airflow

Look at the pathway, not just the vent.

  1. 01Return pathways
  2. 02Filter and blower
  3. 03Duct condition
  4. 04Insulation and leakage
  5. 05Room delivery

Common signs

Airflow problems often show up room by room.

Note which spaces feel different, when the problem is strongest and whether vent airflow changes while the system runs.

  • Weak ventLittle air reaches the room
  • Temperature differenceOne area runs hotter or colder
  • Visible damageDucts appear loose or crushed
  • NoiseWhistling, rattling or air movement

Uneven home?

Tell us which rooms feel different.