To prevent fire hazards, how should chimney inlet openings be sealed?

Chimney inlet openings must be sealed using an approved method to ensure compliance with safety standards outlined in the International Mechanical Code. This requirement emphasizes the importance of utilizing techniques or materials that are specifically recognized as effective and safe by regulatory bodies. The concept of an "approved method" encompasses various practices designed to minimize fire hazards associated with chimney systems, ensuring that the sealing does not impede the system's efficiency or create additional risks.

Sealing chimney inlet openings with non-combustible materials, caulking, or fireproof cloth may not provide the necessary assurance of their effectiveness or suitability unless they are recognized as approved methods. An approved method typically means it has been tested, assessed, and endorsed by a relevant authority, which plays a crucial role in maintaining safety standards in mechanical systems.