SCHEDULE 3DESCRIPTIONS OF BUILDING AND WORK, INCLUDING THE PROVISION OF SERVICES, FITTINGS AND EQUIPMENT, NOT REQUIRING A WARRANT
A. On condition that types 1-23 in all respects and/or in the manner of their fitting meet any relevant requirement of the regulations.
7. Any work associated with a balanced flue serving a room-sealed appliance. Except-Any work associated with a balanced flue which passes through combustible material.