Table of Contents
Advertisement
2
General venting
The vertical vent terminal should exhaust outside the
building at least 2 feet (61 cm) above the highest point of
the roof within a 10 foot (3.05 m) radius of the termination.
The vertical termination must be a minimum of 3 feet
(91 cm) above the point of exit.
Figure 2-3 Vent Termination from a Flat Roof 10' or
Less from Parapet Wall
Figure 2-4 Vent Termination from a Flat Roof 10' or
More from Parapet Wall
A vertical termination less than 10 feet (3.05 m) from a
parapet wall must be a minimum of 2 feet (61 cm) higher
than the parapet wall.
The vent cap should have a minimum clearance of 4 feet
(1.22 m) horizontally from and in no case above or below,
(continued)
unless a 4 foot (1.22 m) horizontal distance is maintained
from electric meters, gas meters, regulators and relief
equipment.
Do not terminate the vent in a window well, stairwell,
alcove, courtyard or other recessed area. The vent cannot
terminate below grade.
Do not use an existing chimney as a raceway if another
appliance or fireplace is vented through the chimney.
To avoid a blocked flue condition, keep the vent cap clear of
snow, ice, leaves, debris, etc.
Flue gases will form a white plume in winter. Plume could
obstruct window view.
Flue gas condensate can freeze on exterior surfaces or
on the vent cap. Frozen condensate on the vent cap can
result in a blocked flue condition. Flue gas condensate can
cause discoloration of exterior building surfaces. Adjacent
brick or masonry surfaces should be protected with a rust
resistant sheet metal plate.
IMPORTANT
Installation & Service Manual
Examine the venting system at least
once a year. Check all joints and vent
pipe connections for tightness. Also
check for corrosion or deterioration.
Immediately correct any problems
observed in the venting system.
9
Hide quick links:
Advertisement
Table of Contents
