7
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
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 differences due to prevailing winds. In
cold climates, double-wall or insulated inlet pipe recommended to prevent condensation.
5 FT
1.5 m
3 FT
0.9 m
16 FT
4.9 m
4 FT
1.2 m
5 FT
1.5 m
1/4 IN. PER FOOT
20 mm/m
1.5 FT
0.5 m
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
