FUTERA FUSION INSTALLATION AND OPERATION INSTRUCTIONS
7
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
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
0
1
2
3
4
5
6
7
8
9
0
5
10
15
20
Horizontal Distance, X
Y ,
ec
nat
si
D l
aci
tr
e
V
2000 & Larger
1201 To 2000
901 To 1200
200 To 900
1000 BTU'S
16 FT
4.9 m
1/4 IN. PER FOOT
20 mm/m
1.5 FT
0.5 m
