What must every fuel-burning heating appliance bear on a permanent and legible factory-applied nameplate?

Every fuel-burning heating appliance is required to have a permanent and legible factory-applied nameplate that bears essential information about the appliance. The inclusion of the manufacturer’s trademark is crucial for several reasons. It allows consumers, installers, and inspectors to easily identify the brand and manufacturer of the appliance, which is important for warranty claims, service, and safety recalls. Additionally, the trademark signifies that the appliance meets the industry standards set by the manufacturer and helps ensure accountability for the performance and safety of the appliance.

While installation date, energy efficiency rating, and product serial number are important for other forms of documentation and operational efficiency, the manufacturer’s trademark is specifically mandated on the nameplate itself. This requirement ensures that all parties involved in the use and maintenance of the appliance can accurately identify the manufacturer's standards and specifications.