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INSTALLATION REQUIREMENTS
1. Install and secure the vertical vent, gas vent or metal vent according to manufacturer's instructions
or in accordance with NFPA 54 National Fuel Gas code or CSA-B149.1 the National Building
Code of Canada and the Installation Code for Gas Burning Equipment or applicable local codes.
The termination of the vertical vent or metal vent MUST be installed in accordance with the height
and roof pitch table (See Figure 1 or Table 1 or refer to NFPA 54 or CSA-B149.1 for
requirements). These minimum heights may be used if the vertical gas vent is not less than 8 feet
from any vertical wall. For other installations, the termination shall be not less than 2 feet above
the highest point where the vertical vent passes through the roof and at least 2 feet higher than
any portion of a building within 10 feet.
TABLE 1
ROOF PITCH
FLAT TO 6/12
6/12 TO 7/12
7/12 TO 8/12
OVER 8/12 TO 9/12
OVER 9/12 TO 10/12
OVER 10/12 TO 11/12
OVER 11/12 TO 14/12
OVER 12/12 TO 14/12
OVER 14/12 TO 16/12
OVER 16/12 TO 18/12
OVER 18/12 TO 20/12
OVER 20/12 TO 21/12
2. The vent termination MUST be at least 4 feet from or 1 foot above any window or opening into the
building.
3. The Starkap™ is sized to the same diameter as the vent inside diameter (Example: 3" vent uses
a SK-3 Starkap™).
H (FEET) Y (FEET)
1.0
2.0
1.25
2.1
1.5
2.3
2.0
2.7
2.5
3.0
3.25
3.5
4.0
4.0
5.0
4.3
6.0
4.5
7.0
4.5
7.5
4.5
8.0
4.5
Page 2
Figure 1
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