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Specifying Duct Leakage – Percent Leakage vs Leakage Class

AABC

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.

If you are interested in sponosring this webinar please contact Anna Kosova, [email protected]. Click here to see sponsor benefits.

 

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Tags: ,

Date

Nov 19 2025

Time

2:00 pm
Category

Speaker

LinkedIn

Contact Information

  • AABC Headquarters;
    1015 18th St. NW
    Suite 603
    Washington, D.C. 20036
  • Phone: 202-737-0202
  • Fax: 202-315-0285
  • [email protected]

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  • Suggested Drawing Specification

    An independent Testing and Balancing Agency certified by the AABC shall be engaged to Test and Balance the HVAC systems. Systems shall be balanced to plus/minus 10% of design requirements. The contractor shall place all systems and equipment into full operation for Testing and Balancing. One copy of the final Test and Balance report with the AABC National Performance Guaranty shall be sent directly to the engineer of record. Provide five (5) additional copies to the contractor.

  • AIA-Format LONG-FORM SPECIFICATION

    Section 230593 – TESTING, ADJUSTING AND BALANCING FOR HVAC

  • AIA-Format SHORT – FORM SPECIFICATION

    Section 230593 – TESTING, ADJUSTING AND BALANCING FOR HVAC

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