Duct Systems
IRC Chapter 16 and Section R302
FBC Residential Chapter 16
International Mechanical Code Chapter 6
Chapter 6 if the IMC provided more detail on duct system design in general, and all requirements or restrictions.
Duct Systems
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Code reference |
Item or Area |
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M1601.1 |
Duct design |
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M1601.1.1 |
Above-ground duct systems |
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M1601.1.2 |
Underground duct systems |
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M1601.3 |
Duct materials |
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M1601.3 |
Duct insulation materials |
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M1601.4 |
Installation |
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M1601.4.4 R302.11 |
Fire blocking Fire blocking requirements for wood framing |
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M1601.5 |
Under-floor plenums |
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M1601.5.3 |
Furnace connections |
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M1601.6 |
Garage HVAC systems |
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R302.5.2 |
Garage duct penetrations |
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602 (IMC) |
Plenum and Plenum construction |
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Section 1602 |
Return Air |
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M1602.2 & 601.5 (IMC) |
Return air openings |
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M1602.3 & 601.6 (IMC) |
Balanced return air |
Return Air Requirements
IMC 601.5 Prohibits return air within 10 ft from combustion appliances.
Energy Efficiency for Ducting
|
N1103.3.1 |
Minimum insulation requirements for ductwork. |
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N1103.3.2 |
Joints and connections required to be sealed. |
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N1103.3.2.1 |
Air handler required to be sealed |
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N1103.3.3 |
Duct testing required |
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N1103.3.4 |
Duct Leakage |
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N1103.3.5 |
Building cavities not allowed for use as duct plenums |
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N1103.3.6 |
Requirements for ducts partially buried in insulation |
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N1103.3.7 |
Requirements for ducts completely covered with insulation |
Make Up Air or Mechanical Ventilation
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N1103.6 |
Mechanical ventilation |
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N1103.7 |
Equipment sizing and efficiency rating |
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