Duct Systems

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