The thermostat downstairs proudly reads 72°F, and your main living area feels great. The upstairs bedroom across the hall, however, clearly did not get the memo. You feel weak airflow coming out of the supply registers, certain rooms remain stubbornly warm, and your air conditioner seems to run continuously while your summer electric bills climb through the roof.

When conditioned air vanishes between your air handler and your living space, the culprit is often hiding in your attic. Long attic-routed flex duct runs, crushed branches, sagging connections, or old deteriorating ductwork cause the average home to lose 20% to 30% of its conditioned air according to ENERGY STAR. At Harlen Johnson HVAC, Plumbing & Electrical, our duct replacement in Prosper, TX fixes layout bottlenecks so cold air actually reaches every corner of your floor plan. Backed by over 69 years of field-tested experience since 1957, our factory-certified techs inspect your duct runs first to see if a targeted repair will work, or if a full duct replacement is the dependable solution you need. Call our time-tested, locally-trusted specialists today at 972-241-7771 to schedule an airflow inspection!