Specifying Duct Leakage – Percent Leakage vs Leakage Class

Energy efficiency is a main concern for HVAC systems relating to Duct system leakage. The concerning question is how the engineer specifies duct leakage in specifications.

Learning Objectives

1. Know and understand the different standards : AABC Leakage Standards / SMACNA Seal Class A / ASHRAE 90.1 / California Uniform Mechanical Code.
2. Be familiar with how to decipher the allowed leakage rate when using SMACNA leakage class.
3. Able to do a comparison of AABC %leakage standards to System Test CFM vs Duct Section CFM (Cumulative leakage rate) utilizing actual rates.
4. Be able to explain the considerations for Energy Loses & Cost.

Sponsored by: Aeroseal

ESCOs and contractors rely on our turnkey solutions to eliminate airflow issues. Aeroseal’s team of experts and network of service providers target building ventilation and airflow issues to help commercial projects reach their goals – from energy savings and code compliance to IAQ and indoor comfort. And they’re backed by a comprehensive process and innovative duct sealing technology that’s delivered consistent results for more than 150,000 projects nationwide.

Aeroseal’s technology injects a fog of aerosolized sealant into pressurized ductwork to seal air leaks from the inside. Relying on a software-based system to continuously measure airflow and leakage throughout the sealing process.