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Section 3
Stack and Intake Vent Sizing and Installation
Venting Connections - General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Vertical Venting / Inside Combustion Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Vertical Venting / Direct Vent or Sealed Combustion Air . . . . . . . . . . . . . . . . . . 3-7
Venting for multiple units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Combustion Air / Boiler Room Ventilation Requirements . . . . . . . . . . . . . . . . . . 3-10