TinnerFlow™4th YearCode & ComplianceRED · Stop / Verify
Under standard energy conservation codes and SMACNA leak test manuals, a high-pressure commercial duct system specified with a Class A Seal rating must restrict total air volume leakage to under 5% of the total system design CFM capacity when subjected to a full-pressure test verification run.
Under standard energy conservation codes and SMACNA leak test manuals, a high-pressure commercial duct system specified with a Class A Seal rating must restrict total air volume leakage to under 5% of the total system design CFM capacity when subjected to a full-pressure test verification run.
Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.