License Requirements for a Boiler Handling Operation Chief
The required boiler engineer license depends on the total heating surface and whether the boilers are exclusively once-through boilers.
Required License by Boiler Conditions
For work involving boilers with a total heating surface of 25 m² or more but less than 500 m², a Boiler Handling Operation Chief must be appointed from among holders of either a Special-Class or First-Class Boiler Engineer License. This rule also applies when only once-through boilers are handled and their total heating surface is 500 m² or more. For work involving boilers with a total heating surface of 500 m² or more, a Special-Class Boiler Engineer License is required, except when only once-through boilers are handled.
Official sources
The following official Tokyo Denki University materials were used to prepare this page.
- 2025 Student Handbook — School of Engineering (2025 academic year) — PDF page 157