Part Number 550-141-186/0100
7
• Installation • Start-Up • Maintenance • Parts
Figure 3
Individual
stub vents
Figure 4
Combined
vents
Figure 5
Offset
vents
Notes
Minimum vent height using full size connector.
Minimum 2 feet above any structure within 10
feet.
Vent and combined vent materials, length and
diameter must be determined using the
combined venting tables of the National Fuel
Gas Code, ANSI Z223.1–latest edition, or
other accepted engineering design method. Use
a connector rise as high as possible to improve
vent connector capacity.
Vent and vent connector material and design
must be determined using the individual
venting tables of the National Fuel Gas Code,
ANSI Z223.1–latest edition, or other accepted
engineering design method. Use a connector
rise as high as possible to improve vent
connector capacity.
1
2
3
4
Vent caps
Roof line
Outside
wall
3 ft
186-03
5 ft
minimum
minimum
Note 2
Note 1
2 ft
minimum
3 ft
Connector
rise
(Note 3)
Minimum effective
chimney height
Combined vent
diameter
(Note 3)
Combined vent
length
(Note 3)
20 ft
186-04
minimum
3 ft
Connector
rise
(Note 4)
Connector
lateral
(Note 4)
Minimum effective
chimney height
20 ft
minimum
3 ft
minimum
Also see
note 2
186-05
