Which code specifies the requirements for combustion air for oil fired appliances?

The correct choice addresses the specific standards set for the installation and operation of oil-fired appliances. NFPA 31, also known as the "Standard for the Installation of Oil-Burning Equipment," outlines the necessary requirements for combustion air necessary to ensure that these appliances operate safely and efficiently. This includes specifications on how to provide adequate air supply for combustion, which is crucial for preventing issues such as incomplete combustion and carbon monoxide production.

Understanding the emphasis on proper combustion air is essential for ensuring both safety and system efficiency. The National Fire Protection Association (NFPA) developed this code in recognition of the unique needs and potential hazards associated with oil-burning systems. This highlights the importance of following specific codes tailored to the type of equipment being used, rather than generalized building codes or guidance aimed at other systems, such as natural gas appliances or general ventilation practices found in other mentioned codes.