Residential Building Inspector B1General Administration, Legal, and EnforcementHard
A residential building inspector discovers that a newly installed gas furnace does not have the required combustion air openings. The homeowner argues that the furnace is a high-efficiency model and doesn't need as much combustion air as older units. What section of the 2021 IRC addresses the requirements for combustion, dilution, and ventilation air?
- AChapter 17, Hydronics
- BChapter 12, Mechanical Administration
- CChapter 24, Fuel Gas
- DChapter 13, Fuel Gas
Show answer & explanationAnswer & explanation
Correct answer: C. Chapter 24, Fuel Gas
The 2021 IRC Chapter 24 specifically covers 'Fuel Gas' systems, including detailed requirements for combustion, dilution, and ventilation air necessary for the safe operation of fuel-burning appliances.
Why the other options are wrong
- A. Chapter 17 covers hydronic piping, which is unrelated to combustion air.
- B. Chapter 12 covers general mechanical administration, not specific combustion air requirements.
- D. Chapter 13 in some codes might cover fuel gas, but in the 2021 IRC, it's Chapter 24.
IRC Fuel Gas Chapter
The specific chapter in the International Residential Code that details requirements for the installation, maintenance, and safety of fuel gas piping and appliances.
- Covers gas piping, appliance connections, venting, and combustion air.
- Ensures safe operation of gas-fired equipment.
- Critical for preventing carbon monoxide poisoning and fire hazards.
Memory trick: Fuel Gas is Chapter '24', for Air and Burn, it's the Plan.