Lennox G1D91BT

# 47860A005 Page 9
Figure 6
Sidewall Vent Terminal Clearances (Non-Direct Vented Furnaces)
1
In accordance with the current CSA B149.1, Natural Gas and
Propane Installation Code
2
In accordance with the current ANSI Z2223.1/NFPA 54, National
Fuel Gas Code
†
A vent shall not terminate directly above a sidewalk or paved
driveway that is located between two single family dwellings and
serves both dwellings.
‡
Permitted only if veranda, porch, deck, or balcony is fully open on a
minimum of two sides beneath the floor.
* For clearances not specified in ANSI Z2223.1/NFPA 54 or CSA
B149.1, the following statement shall be included:
“Clearance in accordance with local installation codes and the
requirements of the gas supplier and the manufacturer’s installation
instructions.”
†
‡
V
X
Vent Terminal
Air Supply Inlet
Area Where Terminal Is
Not Permitted
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