GS0371: Installation, repair and maintenance of boiler equipment and systems; providing information relating to the repair or maintenance of boiler equipment and systems
GS0421: Designing, planning, engineering, research, development and testing of boiler equipment and systems; consultation in the field of boiler equipment and system engineering, namely, testing and evaluation of boiler equipment and systems to improve performance and efficiency of such equipment and systems; providing a website featuring information on boiler equipment and systems to improve performance and efficiency