Before firing a newly installed furnace, what requirement must be met?

Before firing a newly installed furnace, it is vital to ensure compliance with NFPA 31, which is the National Fire Protection Association's standard for installation of oil-burning equipment. This standard outlines critical safety measures and guidelines for the installation and operation of oil-fueled appliances, helping to prevent potential hazards such as fires or explosions.

Compliance with NFPA 31 ensures that the furnace is installed correctly and adheres to safety protocols, thus protecting both the property and its occupants. Establishing this compliance before operating the furnace also helps in troubleshooting and maintenance, as it sets a standard for safe and effective operation of the equipment.

The other options, while relevant to various aspects of heating systems, do not specifically address the critical safety requirement necessary just prior to firing up a newly installed furnace. For instance, ANSI certification relates to standards for appliances but does not encompass the comprehensive safety measures provided by NFPA 31. A unit price estimate pertains to cost considerations, and homeowner approval, although important for customer satisfaction, does not address the safety or technical aspects of furnace operation.