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21
Figure 16. Venting with Two 90° Elbows
Use SL D-Series
components only.
VENTING WITH TWO (2) 90
o
ELBOWS NATURAL GAS
H MAX. = 16 FT (4.8m) V + V
1
+ H MAX. = 40 FT (12.2m)
H (MAX.)
2 FT (610mm)
3 FT (914mm)
4 FT (1.22m)
6 FT (1.86m)
8 FT (2.48m)
16 FT (4.8m)
VENTING WITH TWO (2) 90
o
ELBOWS PROPANE
H MAX. = 16 FT (4.8m) V + V
1
+ H MAX. = 40 FT (12.2m)
V (MIN.) H (MAX.)
90
o
Elbow on Top NOT ALLOWED
1 FT (305mm) 2 FT (610mm)
2 FT (610mm) 4 FT (1.22m)
3 FT (914mm) 6 FT (1.86m)
4 FT (1.22m) 8 FT (2.48m)
5 FT (1.52m) 16 FT (4.8m)
V (MIN.)
90
o
Elbow on Top
1 FT (305mm)
2 FT (610mm)
3 FT (914mm)
4 FT (1.22m)
5 FT (1.52m)
H
V
V
1
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).