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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).