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Improving building envelope insulation has a direct and beneficial impact on energy use, specifically in heating and cooling requirements. When insulation is enhanced, it minimizes heat transfer between the interior of the building and the outside environment. This means that during colder months, less heat will escape from the building, reducing the demand on heating systems. Conversely, during warmer months, improved insulation prevents excess heat from entering, thereby lessening the workload on cooling systems.

As a result, better insulation leads to a significant reduction in energy consumption for both heating and cooling processes. This not only enhances comfort levels within the building but also contributes to lower energy bills and reduced overall environmental impact, aligning with energy efficiency goals.

While other options consider different aspects, none reflect the primary energy-saving advantages that improved insulation provides, making the reduction in heating and cooling energy requirements the most accurate and relevant outcome.