Hot attic runs waste cooled air before it reaches the room
In Clyde, ductwork that passes through a very hot attic has little margin for leaks or poor insulation. Conditioned air escaping from a loose connection, torn section or unsealed plenum is lost into one of the hottest spaces in the house instead of reaching the registers. That loss can leave a room short on airflow while making an otherwise functioning air conditioner seem too small during summer heat.
The return side deserves the same attention. A leaking return can draw hot, dusty attic air into the system, adding dust and insulation fibers to the air path and loading the filter more quickly. We look past obvious damage for disconnected runs, crushed flex duct, loose boots, unsealed plenums and restricted return airflow.
Sealing works best when the whole air path is checked. After leaks and loose connections are addressed, supply and return airflow still need to remain balanced for the equipment. A tighter duct system should deliver air where it belongs without creating an airflow problem elsewhere in the home.