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insTallaTion
DIRECT EXHAUST - Sidewall Termination (Category IV)
1
Sidewall Termination Location
WARNING
!
Follow all location requirements in this section.
Failure to comply can result in severe personal
injury, death, or substantial property damage.
2
• The minimum distance from adjacent public
walkways, adjacent buildings, windows that can
open, and building openings shall not be less than the
values specified in the National Fuel Gas Code – ANSI
Z223 1/NFPA 54, latest edition, or the National Gas
3
and Propane Installation code – CAN/CSA B149 1
Figure 27 Direct exhaust installation requirements for termination location
4
5
VENT
3 feet above
(not below)
if within 10 feet
horizontally
6
FORCED AIR INTAKE
7
VENT
VENT
8
GRADE or SNOW LINE
42
MINIMUM CLEARANCES
DOOR
OPENABLE
WINDOW
48 inches min.
48 inches min.
VENT
(NOT recommended — see
below right illustration)
VENT
1 foot above or
4 feet below if within
4 feet horizontally
NON-MECHANICAL
AIR INTAKE
DO NOT TERMINATE:
ROOF
OVERHANG
WALL
5 feet min.
6 feet min. to a wall or
10 feet min. if opposite
an operable opening in
another building
12 inches min.
svf
series
725/850
• Vent and air terminations must be installed at least
12" (0 31m) above grade and snow line
• Consideration should be given to avoid possible
damage caused by vent plumes and condensate
when choosing a venting configuration and location.
• Maintain a minimum clearance of 4 ft (1 22 m)
horizontally from electrical meters, gas meters,
regulators, and relief equipment Do not install
above or below meters, regulators, or relief
equipment
48 inches min.
VENT
Avoid possible contact
with people or pets
VENT
4 feet above
if within 4 feet
horizontally
METER, REGULATOR,
RELIEF VALVE, etc.
Avoid spaces where
DO NOT
wind eddies can cause
terminate
recirculation
above a
public
walkway
VENT
DO NOT terminate above a
door or window —
condensate can freeze and
cause ice formations
PUBLIC WALKWAY
boiler manual
1
DO NOT TERMINATE:
MECHANICAL
EQUIPMENT
PLANTS
Avoid possible
damage to
surfaces due to
condensate
freezing
DECK OR BALCONY
CONSIDER
WINDOW
The vent plume
can block the
view when the
the vent is located
below a window.
220076
550-100-290/0124
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