NBC 9.21: Chimneys and Flues Standards

NBC Section 9.21 outlines the requirements for the design and construction of chimneys and flues to ensure safe operation and fire protection.

9.21.2.1. Chimney Construction. Chimneys shall be constructed of masonry, concrete, or other noncombustible materials that conform to the appropriate standards.

9.21.4.1. Flue Linings. Flues shall be lined with firebrick, clay tile, or other suitable materials to protect the chimney structure from heat and corrosion.

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