Finned copper tube gas boilers & water heaters – Boiler Manual
8
Figure 3
Vertical Air Intake and Venting for a Direct Vent System (Category IV)
Figure 4
Combination Direct Vent Systems (Category IV)
10 FT 3.1 m
4 FT
1.2 m
5 FT
1.5 m
1.5 FT
0.5 m
5 1/2 FT
1.7 m
1.5 FT. .5 m
10 FT. 3.1 m
3 FT. 1 m
