Appendix AB Sizing of Venting Systems Serving Appliances Equipped With Draft Hoods, Category I Appliances and Appliances Listed for Use With Type B Vents

Appendix AC Exit Terminals of Mechanical Draft and Direct-Vent Venting Systems

Appendix AD Recommended Procedure for Safety Inspection of an Existing Appliance Installation

Appendix AE Manufactured Housing Used as Dwellings

Appendix AF Radon Control Methods

Appendix AG Piping Standards for Various Applications

Appendix AH Patio Covers

Appendix AI Private Sewage Disposal

Appendix AJ Existing Buildings and Structures

Appendix AK Sound Transmission

Appendix AL Permit Fees

Appendix AM Home Day Care—R-3 Occupancy

Appendix AN Venting Methods

Appendix AO Automatic Vehicular Gates

Appendix AP Sizing of Water Piping System

Appendix AQ Tiny Houses

Appendix AR Light Straw-Clay Construction

Appendix AS Strawbale Construction

Appendix AT [RE] Solar-Ready Provisions—Detached One- And Two-Family Dwellings and Townhouses

Appendix AU Cob Construction (Monolithic Adobe)

Appendix AV Board of Appeals

Appendix AW 3D-Printed Building Construction

Appendix AX Zero Energy Residential Building Provisions

Chapter 17 Combustion Air

User notes:

About this chapter: Chapter 17 applies only to oil-fired and solid fuel-fired appliances. Chapter 24 applies to combustion air for gas-fired appliances.

Code development reminder: Code change proposals to this chapter will be considered by the IRC—Plumbing/Mechanical Code Development Committee during the 2021 (Group A) Code Development Cycle.

Section M1701 General

M1701.1 Scope

Solid fuel-burning appliances shall be provided with combustion air in accordance with the appliance manufacturer's installation instructions. Oil-fired appliances shall be provided with combustion air in accordance with NFPA 31. The methods of providing combustion air in this chapter do not apply to fireplaces, fireplace stoves and direct-vent appliances. The requirements for combustion and dilution air for gas-fired appliances shall be in accordance with Chapter 24.

M1701.2 Opening Location

In flood hazard areas as established in Table R301.2, combustion air openings shall be located at or above the elevation required in Section R322.2.1 or R322.3.2.