Bryant 355BAV Installation, Start-Up, And Operating Instructions Manual page 26

COMBUSTION-AIR PIPE
12-IN. MIN
(305 mm)
VERTICAL TO ROOF
NOTE: A 12 In. (305 mm) minimum offset pipe section is
recommended with short (5 to 8 ft / 1.5 to 2.4 M) vent systems.
This recommendation is to reduce excessive condensate
Fig. 30 - - Short Vent (5 to 8 Ft. / 1.5 to 2.4 M) System
Roof T e rm ination (Pref erred)
V e r tical separation
between comb ustion
air and v ent
8 3/4 in. (222mm)f or 3 in. (76mm)ki t
18 in. maximu m
6 3/4 in. (172mm)f or 2 in. (51mm) ki t
Maintain 12 in. (305mm)min.
clearance abo ve
highest anticipated
sno w le ve l
Maximum of 24 in.(614mm)
abo v e roof
Note: "A" denotes 0 to < 2 in.
Between the first 2 vents
Third vent must be > 36 in. away
90 °
Fig. 31 - - Combustion Air and Vent Pipe Termination
VENT PIPE
At least 36 in.
(914mm)
A
(457mm)
Abandoned masonr y
used as race wa y
(per code)
(51mm)
(914mm)
12 in. min fro m
ov erhang or roof
(typ)
in. (305mm)
12
separation between
bottom ofcomb ustion air and
A
bottom of v ent (typ)
Maintain 12 in.
min. clearance abo ve
highest anticipated
sno w le ve l or grade
whiche ve r is greater (typ)
for Direct Vent (2- -pipe) System (All Sizes)
26
COMBUSTION-AIR PIPE
12-IN. MIN
(305 mm)
VENT PIPE
VERTICAL TO SIDEWALL
Concent ri c V ent and Comb ustion Ai r
Roof T er mination (pre fe rred)
A
At least
36 in.
(914mm)
A
At least 36 in.
(914mm)
Side wa ll te rm inatio n
in. (305mm)
of less than 12 above highest snow level
(305mm)
A06356
Maintain 12 in. (305mm)
min. clearance abo ve
highest anticipated
sno w le ve l, maximum of
24 in . abo v e roof
in. (25mm)
1 maximum (typ) from wall to inlet
in. (305mm)
12 minimum fro m
ov erhang or roof
A
(305mm)
Maintain 12 in.
min. clearance ab ov e
highest anticipated
sno w le v el or grade
which eve r is greate r
Concent ri c V ent
and Comb ustion - Air
Side T e rm inatio n
A05090