What should the joints and seams of ductwork generally comply with according to UL 181A?

According to UL 181A, the joints and seams of ductwork should comply with being pressure-sealed. Pressure sealing is essential because it ensures that air leakage is minimized, enhancing the overall efficiency of HVAC systems. A pressure-sealed joint provides a reliable barrier against air loss, permitting the system to operate efficiently and reducing energy costs. This method is particularly important in both residential and commercial applications, where maintaining the desired airflow and temperature is critical for comfort and energy management.

Using other sealing methods, such as taping, stitching, or welding, may not provide the same level of assurance against air leakage that pressure sealing does. While these methods can be effective in certain situations, they are typically not as robust as pressure sealing. Thus, adhering to the UL 181A standard for pressure-sealed joints and seams is crucial for compliance with safety and performance specifications in ductwork installations.