23
Figure 18. Venting with three 90° elbows
Use SL D-Series
components only.
VENTING WITH THREE (3) 90
o
ELBOWS NATURAL GAS
VENTING WITH THREE (3) 90
o
ELBOWS PROPANE
V + H + V
1
+ H
1
MAX. = 40 FT (12.2m)
V + H + V
1
+ H
1
MAX. = 40 FT (12.2m)
V (MIN.)
H (MAX.)
H + H
1
(MAX.)
90
o
Elbow on Top
2 FT (610mm)
4 FT (1.22m)
1 FT (305mm)
3 FT (914mm)
6 FT (1.86m)
2 FT (610mm)
4 FT (1.22m)
8 FT (2.48m)
3 FT (914mm)
6 FT (1.86m)
12 FT (3.72m)
4 FT (1.22m)
8 FT (2.48m)
16 FT (4.8m)
5 FT (1.52m)
16 FT (4.8m)
16 FT (4.8m)
V (MIN.)
H (MAX.)
H + H
1
(MAX.)
90
o
Elbow on Top
NOT ALLOWED
NOT ALLOWED
1 FT (305mm)
2 FT (610mm)
4 FT (1.22m)
2 FT (610mm)
4 FT (1.22m)
8 FT (2.48m)
3 FT (914mm)
6 FT (1.86m)
12 FT (3.72m)
4 FT (1.22m)
8 FT (2.48m)
16 FT (4.8m)
5 FT (1.52m)
16 FT (4.8m)
16 FT (4.8m)
H
1
H
V
1
V
Note: There MUST be a 25% reduction
in total H when using flex vent, except
when using the simple up and out
installation (see Figure 9).
