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// CODE SNIPPET

6.4.4.2.2 Duct Leakage Tests

Energy Standard for Buildings Except Low-Rise Residential Buildings 2016 of Illinois > 6 Heating, Ventilating, and Air Conditioning > 6.4 Mandatory Provisions > 6.4.4 HVAC System Construction and Insulation > 6.4.4.2 Ductwork and Plenum Leakage > 6.4.4.2.2 Duct Leakage Tests
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Ductwork that is designed to operate at static pressures in excess of 3 in. of water and all ductwork located outdoors shall be leak-tested according to industry-accepted test procedures (see Informative Appendix E). Representative sections totaling no less than 25% of the total installed duct area for the designated pressure class shall be tested. All sections shall be selected by the building owner or the designated representative of the building owner. Positive pressure leakage testing is acceptable for negative pressure ductwork. The maximum permitted duct leakage shall be
Lmax = CLP0.65
where
Lmax = maximum permitted leakage, cfm per 100 ft2 of duct surface area
CL = 4, duct leakage class, cfm per 100 ft2 of duct surface area per in. of water0.65
P = test pressure, which shall be equal to the design duct pressure class rating, in. of water

Related Code Sections


6.4.4.2.2 Heating, Ventilating, and Air Conditioning, Duct Leakage Tests
of the building owner. Positive pressure leakage testing is acceptable for negative pressure ductwork. The maximum permitted duct leakage shall be L ...
Energy Standard for Buildings Except Low-Rise Residential Buildings 2016 of Illinois > 6 Heating, Ventilating, and Air Conditioning > 6.4 Mandatory Provisions > 6.4.4 HVAC System Construction and Insulation > 6.4.4.2 Ductwork and Plenum Leakage > 6.4.4.2.2 Duct Leakage Tests
R403.3.3 [RE] Residential Energy Efficiency, Duct Testing (Mandatory)
Ducts shall be pressure tested to determine air leakage by one of the following methods: Rough-in test: Total leakage shall be measured ...
2018 Illinois Energy Conservation Code Standards for Privately Funded Commercial Facilities and Standards for Residential Buildings > 4 [RE] Residential Energy Efficiency > R403 Systems > R403.3 Ducts > R403.3.3 Duct Testing (Mandatory)
C403.11.2.3 [CE] Commercial Energy Efficiency, High-Pressure Duct Systems (Mandatory)
in accordance with Section C403.11.1. In addition, ducts and plenums shall be leak tested in accordance with the SMACNA HVAC Air Duct Leakage Test Manual ...
2018 Illinois Energy Conservation Code Standards for Privately Funded Commercial Facilities and Standards for Residential Buildings > 4 [CE] Commercial Energy Efficiency > C403 Building Mechanical Systems > C403.11 Construction of HVAC System Elements (Mandatory) > C403.11.2 Duct Construction (Mandatory) > C403.11.2.3 High-Pressure Duct Systems (Mandatory)
R403.3.7 [RE] Residential Energy Efficiency, Ducts Located in Conditioned Space
barrier and within the building thermal envelope. 2.2. The duct leakage, as measured either by a rough-in test of the ducts or a post-construction total ...
2018 Illinois Energy Conservation Code Standards for Privately Funded Commercial Facilities and Standards for Residential Buildings > 4 [RE] Residential Energy Efficiency > R403 Systems > R403.3 Ducts > R403.3.7 Ducts Located in Conditioned Space
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