Starting with the 2012 IECC (International Energy Conservation Code) duct leakage testing is mandatory for any duct systems located outside of conditioned space. For systems with ductwork outside of conditioned space the total duct leakage cannot exceed 4CFM per 100 sf of conditioned floor area. To minimize risk we recommend installing all ductwork in conditioned space to eliminate duct testing for code compliance. Installing tight ductwork helps create uniformly conditioned spaces and proper functioning systems. Duct sealing is strongly recommended and testing will ensure the contractors are held to a high standard in construction.
Sustainable Comfort can help you meet the code with duct leakage testing.