// CODE SNIPPET
511.4 Common Duct (Manifold) Systems
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The bleed-air duct shall have a
fire damper not less than 12 inches (305 mm) from the
exhaust duct connection. [NFPA 96:8.4.3]
The bleed-air
duct shall have the same construction and clearance
requirements as the main exhaust duct from the connection
to the exhaust duct to not less than 12 inches (305
mm) on both sides of the fire damper. [NFPA 96:8.4.4]
Each bleed air duct shall have a
means of adjusting (e.g., using volume dampers) the
bleed air quantity. [NFPA 96:8.4.5]
Means to adjust the
bleed air quantity shall be installed between the fire
damper and the source of bleed air. [NFPA 96:8.4.6]
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California Mechanical Code 2019 > 5 Exhaust Systems > 511.0 Air Movement > 511.4 Common Duct (Manifold) Systems > 511.4.7 Disconnect