Tjernlund Auto-Draft FSAD & VSAD Series Inducers 8504090 Rev 11/00 - Manual (Page 6)

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TERMINATION CLEARANCES FOR U.S. INSTALLATIONS
The Auto-Draft® Venter base must be a minimum of 9” above a roof. Optional roof and wall mounting kits are available from Tjernlund.
CODE REQUIREMENTS
Terminate the Auto-Draft® Venter so that proper minimum clearances are maintained as cited in the latest edition of the National Fuel
Gas Code (NFPA 54), NFPA 211 or 31 when applicable, (See Diagram B):
• Not be less than 7 feet above grade when located adjacent to public walk ways.
• At least 3 feet above any forced air inlet located within 10 feet.
• At least 4 feet below, 4 feet horizontally from or 1 foot above any door, window or gravity air inlet into any building.
• At least 1 foot above grade.
• So that the flue gases are not directed so as to jeopardize people, overheat combustible structures or enter buildings, and
• Not less than 2 feet from an adjacent building.
INS
DIAGRAM A CANADA