A brand-new, correctly sized AC system connected to old, leaky, or undersized ductwork will still underperform, because the ductwork determines how much of the conditioned air the system produces actually reaches each room. Dallas homes built before the 2000s frequently have original ductwork that's undersized for modern airflow requirements, has developed leaks at the joints over decades, or was routed in a way that starves rooms furthest from the air handler.
We assess ductwork condition and sizing as a standard part of any AC replacement estimate, since installing a new high-efficiency system on top of a ductwork problem is a common way homeowners end up disappointed with a system that should be performing well. Where ductwork replacement or redesign is warranted, we correct sizing to match the new system's airflow output, seal joints and connections properly, and address routing issues where they're causing specific rooms to run hot or cold relative to the rest of the house.
For commercial and larger residential projects, ductwork redesign is often the difference between a system that meets its rated capacity and one that never quite performs to spec despite correctly sized equipment.
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