Which regulation pertains to the installation of gas-fired appliances?

The correct choice regarding the installation of gas-fired appliances is Section 24. This section is specifically designed to address the requirements and guidelines for the proper installation, operation, and maintenance of gas-fired appliances to ensure safety and efficiency.

Understanding this section is crucial because it outlines necessary considerations such as the clearances required from combustible materials, ventilation requirements, and requirements for the safe connection to gas supply lines. Compliance with these regulations helps prevent hazards such as gas leaks, explosions, and carbon monoxide poisoning, fostering a safer environment for users.

The other sections mentioned in the choices may relate to different aspects of gas safety or regulations but do not specifically focus on the installation of gas-fired appliances. For anyone studying the National Fuel Gas Code, familiarizing themselves with Section 24 is essential for both practical application and ensuring adherence to safety standards.