Boiler installer license class 2B allows for the installation of what type of boiler?

The class 2B boiler installer license specifically permits the installation of low-pressure boilers regardless of their capacity or firing rate. Low-pressure boilers, typically operating at pressures below 15 psi for steam and 160 psi for hot water, are common in residential and commercial heating systems. This licensing is designed to ensure that installers have the necessary training and knowledge to safely handle the specific requirements and risks associated with these systems.

The other types of boilers mentioned in the options involve different operational standards and regulations. For instance, high-pressure boilers operate above 15 psi steam pressure and require more extensive training and certification due to the increased risks involved. Nuclear heat source boilers involve unique safety considerations and regulatory requirements, making them entirely separate from low-pressure installations. Lastly, the capacity of power boilers is often much greater and more complex, requiring a different class of license due to the advanced technologies and safety procedures they involve. Thus, the focus of the class 2B license on low-pressure boiler installations ensures that the installer is adequately trained for the specific responsibilities associated with these systems.