Finned copper tube gas boilers & water heaters – Boiler Manual
Finned copper tube gas boilers & water heaters – Boiler Manual
7
F
Figure 1
Horizontal Air Intake and Venting for a Single Direct Vent System
Figure 2
Horizontal Air Intake and Venting for Multiple Direct Vent Systems
When running horizontal combustion air and venting for
single or multiple units, exhaust and combustion air
terminals must be installed on the same plane (outside wall)
in order to prevent pressure diff erences due to prevailing
winds. In cold climates, double-wall or insulated inlet pipe
recommended to prevent condensation.
5 FT
1.5 m
1.5 FT
0.5 m
2 IN.
5.0 cm
4001 & LARGER
2001 TO 4000
1001 TO 2000
500 TO 1000
MBH
FT
m
15
4.6
20
6.1
5
1.5
10
3.1
kW
146 TO 293
293 TO 586
586 TO 1172
1172 & LARGER
16 FT 4.9 m
1/4 IN. PER FOOT
20 mm/m
1.5 FT 0.5 m
1000 BTU’S
