How To Use The Vent Graph; Venting Guidelines - Heat & Glo PALOMA-BL Owner's Manual

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. (2m), the
horizontal run to the outer wall flange must not exceed 13
ft. (4m).
.
Example 2: If the vertical dimension from the top of the
appliance is 21 ft. (6.4m), the horizontal run to the outer wall
flange must not exceed 9 ft. (3m).
4. Each 90° elbow is equivalent to 3 ft. (914mm) of vent
pipe and each 45° elbow is equivalent to 1 ft. (305mm)
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. (5m) run. Each
additional 90° elbow reduces the maximum horizontal
distance by 3 ft. (914mm).
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.)
VERTICAL DISTANCE
FROM APPLIANCE TO
TO THE 90° ELBOW
6 ft. (2m) Minimum Vertical
Termination
C L
Figure 5.2
February 8, 2006
35'
34'
32'
30'
28'
26'
24'
22'
EX. 2
20'
18'
16'
14'
12'
10'
8'
EX. 1
6'
4'
2'
0'
11-5/8" 2'
(MIN)
C L
For rear vent or top
of appliance for top
6 in. (152mm) Minimum starter pipe
vent.
Heat & Glo · Paloma · 7031-220G
E. Venting Guidelines
Notes:
• The maximum horizontal vent run is 15 ft. (5m) when the
vertical vent rise is 10 ft. (3m).
• The minimum horizontal vent run is 11-5/8 in. (295mm).
• Horizontal sections require a 1/4 in. (6mm) rise for every
12 in. (305mm) of horizontal travel.
• Horizontal sections require noncombustible support every
3 ft. (914mm), e.g. wall strap.
• Wall thickness: Minimum 4 in. (102mm). Maximum 20
in. (508mm).
• Vent Diameter: Exterior 6-5/8 in. (168mm); Inner 4 in.
(102mm)
EXCEPTION FOR REAR VENT KIT (Snorkel Kit SLK-
SNKD), HORIZONTAL INSTALLATION:
• The maximum horizontal vent run is 3 ft. (914mm).
• The maximum horizontal vent run with a 45° elbow is 2 ft.
(610mm).
• No external minimum rise is required. The minimum
horizontal vent run is 11-5/8 in. (295mm).
• For any vertical rise when rear venting, a minimum of 2
ft. (610mm) vertical must be used prior to any horizontal
run.
4' 6' 8' 10' 12'
3 ft. (914mm) Maximum Horizontal run with no
vertical pipe and with 1/4 in. (6mm) rise per
foot. Must use Snorkel cap.
TOTAL HORIZONTAL RUN TO
OUTSIDE OF EXTERIOR WALL
(INCLUDING ELBOWS)
To adjust the vent restrictor
plate, see page 33.
14' 15'
(MAX)
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