11
FUTERA II INSTALLATION AND OPERATION INSTRUCTIONS
Figure 3 – Horizontal Air Intake and Venting for a Single Direct Vent System
Figure 4 – Horizontal Air Intake and Venting for Multiple Direct Vent Systems
WARNING: 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.
10 ft
(3.1 m)
16 FT 4.9 m
1/4 IN. PER FOOT
20 mm/m
1.5 FT 0.5 m
0
1
2
3
4
5
6
7
8
9
0
5
10
15
20
Horizontal Distance, X
Y ,
ec
na
tsi
D l
aci
tr
e
V
2000 & Larger
1201 To 2000
901 To 1200
200 To 900
1000 BTU'S