Post construction duct leakage shall be less than or equal to ___ per 100ft² of conditioned floor space?

The guideline that post-construction duct leakage should be less than or equal to 4 CFM per 100 square feet of conditioned floor space is based on energy efficiency standards and building codes designed to ensure the effectiveness of HVAC systems. This standard helps to minimize energy loss and maintain temperature control within the conditioned space.

Achieving low duct leakage is essential for improving system performance and energy efficiency. High leakage can lead to significant conditioned air loss, resulting in higher energy costs and decreased comfort for occupants. The 4 CFM standard promotes the installation of well-sealed duct systems that effectively distribute heated or cooled air as intended.

Compliance with this standard is critical for ensuring that HVAC systems operate efficiently, reducing the workload on heating and cooling equipment, and ultimately contributing to longer equipment lifespan and significant energy savings over time.