14
31818 Rev J
01/04
ODYSSEY SERIES FIREPLACE WITH GAS LOG SET
2. Chimney Height Requirements (Above the Roof Line)
a.
Major building codes specify a minimum chimney height above the roof top. These specifications are summarized in
what is known as the Ten Foot Rule. This rule states:
If the horizontal distance from the side of the chimney to the peak of the roof is 10 feet or less, the top of the chimney
must be at least 2 feet above the peak of the roof, but never less than 3 feet in overall height above the highest point
where it passes through the roof. See Figure 9.
If the horizontal distance from the side of the chimney to the peak of the roof is more than 10 feet, a chimney height
reference point is established on the surface of the roof a distance of 10 feet from the side of the chimney in a
horizontal plane. The top of the chimney must be at least 2 feet above this reference point, but never less than 3 feet
in height above the highest point where it passes through the roof.
b.
These chimney heights are necessary in the interest of safety but do not ensure smoke-free operation. Trees,
buildings, adjoining roof lines, adverse wind conditions, etc. may create a need for a taller chimney should smoking
occur.
3. Determine the Number of Chimney Sections Required
To determine the chimney components needed to complete your particular installation, follow the below steps:
a.
Determine the total vertical height of the fireplace installation. This dimension is measured from the base of the
fireplace assembly hearth stone to the point where the smoke exits the termination cap.
b.
Subtract the height of the fireplace assembly from the overall height of the fireplace installation.
c.
Refer to the chart below to determine what components must be selected to complete the fireplace installation.
d.
Determine the number of firestop spacers, stabilizers, roof flashing, etc. required to complete the fireplace installation.
Figure 9 - Chimney Height
* Dimensions reflect effective height.
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6
4
Table 2
