Understanding the Stack Effect: How Duct and Envelope Sealing Can Boost Energy Efficiency When it comes to managing airflow, energy […]
When it comes to managing airflow, energy efficiency, and comfort in commercial buildings and new constructions, the stack effect is a critical factor to consider. The stack effect, or chimney effect, occurs when differences in air temperature cause pressure imbalances inside a building, leading to significant air leakage. For builders and commercial property owners, understanding and controlling the stack effect is essential for optimizing energy use, reducing costs, and ensuring occupant comfort. Fortunately, with solutions like Aeroseal's duct and envelope sealing, you can mitigate the impact of the stack effect, improving airflow and enhancing building performance. What Is the Stack Effect? The stack effect occurs when warm air rises and escapes from the upper floors of a building, creating a pressure imbalance. As the warm air escapes, cold air from outside gets pulled into the lower levels to replace it. This movement of air creates a continuous cycle of air movement, which can lead to significant energy loss, discomfort, and even structural problems if not properly managed. The stack effect can be pronounced especially in tall buildings, where large interior volumes and high ceilings are common. Without proper sealing, the gaps and cracks in ductwork and building envelopes allow conditioned air to escape, putting a strain on HVAC systems and driving up energy bills. How Does the Stack Effect Affect Commercial Buildings? For commercial building owners and builders, the stack effect can cause a range of issues: Increased Energy Costs As conditioned air escapes due to the stack effect, HVAC systems must work harder to maintain temperature, leading to higher energy consumption and costs. Uneven Flow of Air and Temperature Difference High-rise buildings affected by the stack effect often experience uncomfortable temperature fluctuations, with hot air accumulating in…