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
Code reference | Item or Area |
|
M1601.1 | Duct design | |
M1601.1.1 | Above-ground duct systems | |
M1601.1.2 | Underground duct systems | |
M1601.3 | Duct materials | |
M1601.3 | Duct insulation materials | |
M1601.4 | Installation | |
M1601.4.4 R302.11 | Fire blocking Fire blocking requirements for wood framing | |
M1601.5 | Under-floor plenums | |
M1601.5.3 | Furnace connections | |
M1601.6 | Garage HVAC systems | |
R302.5.2 | Garage duct penetrations | |
602 (IMC) | Plenum and Plenum construction | |
| ||
Section 1602 | Return Air | |
M1602.2 & 601.5 (IMC) | Return air openings | |
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. | |
N1103.3.2 | Joints and connections required to be sealed. | |
N1103.3.2.1 | Air handler required to be sealed | |
N1103.3.3 | Duct testing required | |
N1103.3.4 | Duct Leakage | |
N1103.3.5 | Building cavities not allowed for use as duct plenums | |
N1103.3.6 | Requirements for ducts partially buried in insulation | |
N1103.3.7 | Requirements for ducts completely covered with insulation |
Make Up Air or Mechanical Ventilation
N1103.6 | Mechanical ventilation | |
N1103.7 | Equipment sizing and efficiency rating | |
