
VA N TA G E
®
H E
I N S TA L L AT I O N M A N U A L
R O B E R T S
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G O R D O N
pg 26
VERTICAL VENTING (See Figure 24)
a) In the United States: Refer to NFPA-54/ANSI-Z223.1 -
latest revision, National Fuel Gas Code, for proper vent
sizes and installation.
b) In Canada: Refer to CAN/CGA B149.1 and B149.2:
Installation Codes for Gas Burning Appliances, for
proper vent sizes and installation.
c) Type "B" vent materials must be used outdoors.
d) An insulating thimble may be required to pass through
combustible structures.
e) 4" (10 cm) O.D. vent pipe, maximum 45 ft.
(13.7 m) in length may be used as shown above with
an approved vent cap.
Figure 24. Vertical Venting Configuration
Vent adapter
4" Single wall pipe
Approved thimble
(if applicable)
Roof flashing
4" Type "B"
vent pipe
18" min.
4" Type "B" vent cap
(P/N 90502300)