Heatilator • RBV4236/RBV4842 • 4048-210 • Rev S • 6/10
20
Minimum
clearances are
per vent
manufacturer's
specifications
Metal
plumber's strap
secured to
framing
Vent supports are per
vent manufacturer's
specifications
12 ft (3.66 m) min.
60 ft (18.29 m) max.
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.
Maximum horizontal run is 50% of
vertical. Horizontal run cannot be
more than 30 ft. (9.14 m).
Vent supports
are per vent
manufacturer’s
specifications.
Metal
Plumbers'
Strap
7
Vent Information and Diagrams
A. Vent Guidelines
WARNING! Fire Risk/Asphyxiation!
This appliance re-
quires the specified pipe for operation. Incorrect pipe may
cause spillage, condensation and overheating.
These models require 6 in. (152 mm) double wall, B-vent
pipe.
• Follow pipe manufacturer’s installation guidelines when
installing the appliance.
B. Vent System Configuration
CAUTION! Risk of Fire!
ALL vent configuration specifi
-
cations MUST be followed.
This product is tested and listed
to these specifications. Appliance performance will suffer if
specifications are not followed.
Rise to Run Ratio = 2:1
Maximum Total Horizontal Run = 30 Feet
Minimum Total Vertical Rise = 12 Feet
Maximum Total Vertical Rise = 60 Feet
Maximum Number of Elbows: Four (45º or 90°)
WARNING!
Fire Risk/Explosion/Asphyxiation!
DO NOT
connect this gas appliance to a chimney flue serving a
separate solid-fuel or gas burning appliance.
• Vent this appliance directly outside.
• Use separate vent system for this appliance.
May impair safe operation of this appliance or other
appliances connected to the flue.
WARNING! Risk of Fire or Explosion!
Insulation and
other combustibles must not infringe on clearances.
• ALWAYS maintain specified clearances around venting
and firestop systems.
• Install firestops as specified.
Failure to keep insulation or other material away from vent
pipe may cause fire.
Figure 7.1 Vertical Termination Clearances
Figure 7.2 Maximum Horizontal Run
Figure 7.3 Maximum Horizontal Run
Note:
46° to 90° elbows are not allowed without a fixed
glass door. Only 45° elbows or less are allowed. A straight
section is not required before the first elbow.
