Exfiltration refers to the unwanted movement of air from the conditioned interior of a building to the exterior. It occurs through leaks, gaps, or openings in the building envelope, allowing conditioned air to escape and unconditioned air to enter. Understanding and addressing exfiltration is crucial for improving building energy efficiency and occupant comfort.
In this comprehensive guide, we explore the causes and consequences of exfiltration. We discuss the factors that contribute to air leakage, such as poorly sealed windows and doors, gaps in walls or ceilings, and improperly installed insulation. By identifying these sources of exfiltration, you can take steps to mitigate air leakage and improve the overall performance of the building envelope.
Discover strategies to manage and reduce exfiltration. Proper air sealing techniques, including weatherstripping, caulking, and the use of air barriers, can significantly minimise air leakage and improve energy efficiency. We discuss the importance of comprehensive air sealing measures throughout the building envelope, including around windows, doors, electrical outlets, and other potential sources of leaks.
Additionally, we explore the benefits of conducting a blower door test to assess the level of exfiltration in a building. This test helps identify areas of high air leakage and provides valuable data for targeted air sealing efforts. By addressing these areas, you can enhance energy efficiency, reduce heating and cooling costs, and create a more comfortable indoor environment.
We also highlight the importance of proper ventilation in managing exfiltration. While reducing air leakage is essential for energy conservation, it is equally important to ensure adequate ventilation to maintain indoor air quality. We discuss the role of balanced ventilation systems, including mechanical ventilation and controlled airflow, in achieving a healthy and efficient indoor environment.
By understanding and addressing exfiltration, you can improve building energy efficiency, reduce energy waste, and enhance occupant comfort. Explore the resources and insights provided in this guide to gain a comprehensive understanding of exfiltration and its management strategies. Take steps towards a more airtight and energy-efficient building envelope.