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09/04
30484 Rev Q
13
MAXUS DIRECT VENT HEATER
b.
Vent Lengths for Top Venting
(for rear venting,
see page 14)
Various venting configurations are shown in
Figures 9-12 from which maximum vent lengths
can be determined.
Figure 9
Vent Lengths with One Elbow
(Minimum Vertical)
Figure 10
Vent Lengths with One Elbow
(1 ft vertical or more, 25 ft maximum)
Figure 11
Vent Lengths with Two Elbows
CAUTION:
Provisions shall be made to provide adequate
combustion and ventilation air.
WARNING - RISK OF FIRE!
The horizontal run of vent must have a 1/4 in. rise
for every 1 ft of run towards the termination. Never
allow the vent to run downward. This could cause
high temperatures and may create a fire hazard.
Figure 12
Vent Lengths with Three Elbows