Finned copper tube gas boilers & water heaters – Boiler Manual
5
Figure 2
Vertical venting using a masonry chimney system
and inside air
Figure 3
Horizontal venting using
inside air
305 TO 457
127 TO 254
VENT PIPE DIAMETER
5" TO 10"
12" TO 18"
MINIMUM VERTICAL RISE
OFF THE TOP OF UNIT "A"
IN.
mm
FT
mm
12"
24"
305
610
1.5 FT 0.5 m
1/4 IN. PER F00T 20 mm/m
Table 2