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// CODE SNIPPET

604.1.1 Within Duels or Plenums

Los Angeles Mechanical Code > 6 Duct Systems > 604.0 Insulation of Ducts > 604.1 General > 604.1.1 Within Duels or Plenums
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Materials installed within ducts and plenums for insulating, sound deadening, or other purposes shall have a mold, humidity, and erosion-resistant surface where tested in accordance with UL 181. Duct liners in systems operating with air velocities exceeding 2000 feet per minute (10.16 m/s) shall be fastened with both adhesive and mechanical fasteners, and exposed edges shall have approved treatment to withstand the operating velocity. Where the internal insulation is capable of being in contact with condensates or other liquids, the material shall be water-resistant.

Related Code Sections


604.1.1 Duct Systems, Within Duels or Plenums
Materials installed within ducts and plenums for insulating, sound deadening, or other purposes shall have a mold, humidity, and erosion-resistant ...
Los Angeles Mechanical Code > 6 Duct Systems > 604.0 Insulation of Ducts > 604.1 General > 604.1.1 Within Duels or Plenums
1104.2.3.2 Refrigeration, Plenums
The space above a suspended ceiling shall not be included in calculating the refrigerant quantity limit in the system unless such space is part ...
Los Angeles Mechanical Code > 11 Refrigeration > 1104.0 Requirements for Refrigerant and Refrigeration System Use > 1104.2 Refrigerant Concentration Limit > 1104.2.3 Ventilated Spaces > 1104.2.3.2 Plenums
1104.2.3.2 Refrigeration, Plenums
The space above a suspended ceiling shall not be included in calculating the refrigerant quantity limit in the system unless such space is part ...
Los Angeles Mechanical Code > 11 Refrigeration > 1104.0 Requirements for Refrigerant and Refrigeration System Use > 1104.2 Refrigerant Concentration Limit > 1104.2.3 Ventilated Spaces > 1104.2.3.2 Plenums
2604.1.1 Plastic, Plenums
Foam plastics installed in plenums as interior wall or ceiling finish shall comply with Section 2603.7. Foam plastics installed in plenums ...
Los Angeles Building Code > 26 Plastic > 2604 Interior Finish and Trim > 2604.1 General > 2604.1.1 Plenums
604.1.1 Duct Systems, Within Ducts or Plenums
Materials installed within ducts and plenums for insulating, sound deadening, or other purposes shall have a mold, humidity, and erosion-resistant ...
Los Angeles Mechanical Code > 6 Duct Systems > 604.0 Insulation of Ducts > 604.1 General > 604.1.1 Within Ducts or Plenums
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