Heatilator NB3630M, Owner'S Manual

Page: 14 / 68

14 Heatilator • Novus BV-Mesh • 4031-553 Rev F • 11/07
45°
Elbow
90°
Elbow
Offsets exceeding
45° adapt horizontal
limitations
Maximum
horizontal
30 ft (9.14 m)
Note: Maximum horizontal
distance is 50% of vertical
vent height.
Fire Risk
Explosion Risk
Insulation and other combustibles must not
infringe on clearances.
• ALWAYS maintain speci
fi ed clearances
around venting and fi restop systems.
• Install fi restops as speci fi ed.
Failure to keep insulation or other material
away from vent pipe may cause
fi re.
WARNING
Figure 5.3 Maximum Horizontal Run