Filter
Top Products
14 Heatilator • GB4336/GB4992 • 4003-085 Rev H • 04/06
45°
Elbow
90°
Elbow
Offsets exceeding
45° adapt horizontal
limitations
Maximum
horizontal
20 ft (6.1 m)
Note: Maximum horizontal
distance is 50% of vertical
vent height.
Maximum horizontal run is 50% of
vertical. Horizontal run cannot be
more than 20 ft. (6.1 m).
Vent supports
are per vent
manufacturer’s
specifications.
Metal
Plumbers'
Strap
Figure 5.2 Maximum Horizontal Run
Fire Risk
Explosion Risk
Insulation and other combustibles must not
infringe on clearances.
• ALWAYS maintain specifi ed clearances
around venting and fi restop systems.
• Install fi restops as specifi ed.
Failure to keep insulation or other material
away from vent pipe may cause fi re.
WARNING
Figure 5.3 Maximum Horizontal Run
Note: 90-degree elbows are not allowed without a
fi xed glass door. Only 45-degree elbows or less are
allowed. A straight section is not reuqired before the
fi r s t e l b o w .