What type of collectors must be listed and labeled with specific information by the manufacturer?

Factory-built collectors must be listed and labeled by the manufacturer with specific information to ensure they meet safety and performance standards. This requirement is in place to provide assurance that the collectors have undergone rigorous testing and meet established codes for quality and function. The labeling typically includes critical details such as the manufacturer's name, the model number, and compliance with relevant standards, which aids in identification and ensures that the units can be installed confidently by professionals.

In contrast, other types of collectors, such as home-built, DIY types, or assembly-required options, do not have the same regulatory oversight, leading to inconsistencies in quality and safety. These options may not have the necessary manufacturer certifications that guarantee compliance with codes and standards, making factory-built collectors the more reliable choice for both installation and operation.