Heat & Glo • PALOMA-BZ-MOD, PALOMA-GR-MOD, PALOMA-GY-MOD • 2189-900 R14 • 11/14
12
EX. 2
EX. 1
2' 4' 6' 8' 10' 12' 14' 15'
30'
28'
26'
24'
22'
20'
18'
16'
14'
12'
10'
8'
6'
4'
2'
0'
(MAX)
(MIN)
32'
34'
35'
11-5/8”
2 ft. (610 mm) Maximum Horizontal run with no
vertical pipe and with 1/4 in. (6 mm) rise per foot.
6 ft. (2 m) Minimum
Vertical Termination
For rear vent or top
of appliance for top
vent.
CL
6 in. (152 mm) Minimum starter pipe
CL
VERTICAL DISTANCE
FROM APPLIANCE
TO THE 90º ELBOW
TOTAL HORIZONTAL RUN TO
OUTSIDE OF EXTERIOR WALL
(INCLUDING ELBOWS)
To adjust the vent restrictor
plate, see page 34.
VENT RESTRICTOR
PLATE REQUIRED
Figure 5.2
D. How to Use the Vent Graph
1. Measure the distance from the top of appliance to the
center of the 90° elbow. On the graph below, draw a
horizontal line from that measurement on the vertical
axis across until it intersects with the slanted
line.
2. From the point of this intersection, draw a vertical line to
the bottom of the graph.
3. The point at which this line meets the bottom line of the
graph is the maximum length of the horizontal run.
Example 1
: If the vertical dimension from the top of the
appliance to the center of the 90° elbow is 7 ft. (2 m), the
horizontal run to the outer wall flange must not exceed 13
ft. (4 m).
Example 2:
If the vertical dimension from the top of the
appliance is 21 ft. (6.4 m), the horizontal run to the outer
wall flange must not exceed 9 ft. (3 m).
4. Each 90° elbow is equivalent to 3 ft. (914 mm) of vent
pipe and each 45° elbow is equivalent to 1 ft. (305 mm)
of vent pipe, and must be subtracted from vent pipe
run. A single vertical to horizontal 90° elbow is already
calculated into the allowable 15 ft. (5 m) run. Each
additional 90° elbow reduces the maximum horizontal
distance by 3 ft. (914 mm).
Example: The use of three elbows would reduce the
allowable horizontal run to 9 ft. (3 - 1 = 2 elbows x 3 ft. =
6 ft.; 15 ft. max. - 6 ft. = 9 ft. max.)
E. Venting Guidelines
•
The maximum horizontal vent run is 15 ft. (
5
m) when the
vertical vent rise is 10 ft. (3
m).
•
The minimum horizontal vent run is 1
1-5/8
in. (
295
mm).
•
Horizontal sections require a 1/4 in. (6
mm) rise for every
12 in. (305
mm) of horizontal travel.
•
Horizontal sections require noncombustible support every
3 ft. (914
mm), e.g.
wall strap.
•
Wall thickness:
Minimum 4 in. (102
mm).
Maximum 20 in.
(508
mm).
•
Vent Diameter:
Exterior 6-5/8 in. (168
mm); Inner 4 in.
(102
mm)
.
EXCEPTION FOR REAR VENT KIT, HORIZONTAL
INSTALLATION:
•
The maximum horizontal vent run is
2
ft. (
610
mm).
NOTICE:
Maximum horizontal vent run is 18 in. (457 mm)
when using the HRC termination cap.
•
The maximum horizontal vent run with a 45° elbow is
18
in
. (
457
mm).
•
No external minimum rise is required. The minimum
horizontal vent run is 11-5/8 in. (295
mm).
•
For any vertical rise when rear venting, a minimum of 2
ft. (610
mm) vertical must be used prior to any horizontal
run.
