Figure 48 IVent Terminations
COMBUSTION AIR LEVEL OR GRADE,
(ELBOW PARALLEL WHICHEVER IS
TO WALL) GREATER
J
SEPARATION
OVERHANG
Clearance to overhang per code
For single pipe vent
applicatioas, install a 45
......"_. downwarddegreeelbow pointing
12 In (30&Smm) MIN Ground
Level OR Snow Level
Figure 49 l Combustion Air and Vent Pipe Termination for Direct Vent (2-Pipe) System
Vertical separation between
combustion air and vent
8 _i in. (222mm) or 3 in.(76mm)
6 _i in. (172mm) or 2in. (51mm)_
\
Maintain 12 in. (305mm) \
min. Clearance above
highest anticipated snow
level maximum of 24 in.
(614ram) above roof
\\\\\\
L12F031
Roof Termination (Preferred)
Note:
36 in. separation between
pairs of inlets only required
/
At least 36 in ............. _ Note: for direct vent systems
(914mm) ....... | 'A" denotes 0 To 2 in. (51 mm)
D ......... |..A Between the f rst 2 vents Th rd
F |1 _-'_ vent (and foutth vent, if used) ......................
/ 18 n Maxmum _ _ mustbe36 n Away 914mm .............
/ 457mm I ..... i H_F_>_ ............ .---4--'1 | ,
Is ............ * #_'_i H f ............... N-;': ;-- -" = ^^ _ a l _ Uanan 2 n 305ram mn Ceaance
/ _ &- _ ii Hl ........ /A[least_o{n. . i_sP&
-- _') ; ! .--4[: "- / q_.-aj.. _ _._- above highest anticipated snow level
i-7 l ................ L H-F _ (914mm) W _ -_-" maxi ...... f24in. 6t4mm ab...... f
,r ' _i i" iJ] ' _' C ...... tric Vent and Combustion Air
_ i _ t) J J- _ Roof Term nat on (p eferred) 1 in 25mm maximum
I - ff " _
' ' I } "| . - {Typ.) from wall to inlet
t i .L -
Abandoned masonry used
as raceway (per code) "
12 in. From Overhang
or roof (Typ.)
(914mm)
_tleast 36 in.
(914mm)
separation
between bottom of corn
bustion air and bottom of
vent (Typ.)
Maintain 12 in. (305ram) min.
Clearance above highest an
ticipated snow level or grade
whichever is greater (Typ.)
Maintain 12 in. (305ram) rain. Clear
ance above highest anticipated snow
(914range level or grade whichever is greater
....... (Typ.)
Side wall termination of
less than 12 in. (305ram)
above highest snow level
Note:
'A" denotes 0 To 2 in. (51 mm)
Between the first 2 vents Third
vent (and fourth vent. if used) must
be 36 in. Away (914mm)
L12F032
42 Specifications subject to change without notice. 440 01 4001 04
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