How To Use The Vent Graph; Venting Guidelines - Heat & Glo TIARAII-BK-B 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 center line of
the ue vent to the center of the 90° elbow is 7 ft. (2m), the
horizontal run to the outer wall ange must not exceed 16 ft.
(5m).
.
Example 2: If the vertical dimension from the center line of the
ue vent is 21 ft. (6m), the horizontal run to the outer wall ange
must not exceed 12 ft. 10 in. (4m).
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 the vent pipe run. A
single horizontal to vertical 90° elbow is already calculated
into the allowable 20 ft. (6m) run. Each additional 90°
elbow reduces the maximum horizontal distance by 3 ft.
(914mm).
Example: The use of 3 elbows would reduce the allowable
horizontal run to 9 ft. (3 -1 = 2 elbows x 3 ft. = 6 ft.; 20 ft.
max. - 6 ft. = 14 ft. max.).
VERTICAL DISTANCE
FROM APPLIANCE TO
90° ELBOW
6 in. (152mm) Minimum
Horizontal with Vertical Termination
Figure 5.2
40 ft. (12m)
Maximum Vertical
Example 2
Example 1
2 ft. (609 mm)
Minimum Vertical
2 ft.. (609mm) Minimum
Vertical Termination
C
L
C
L
Heat & Glo • TIARA II-B • 7011-148 Rev. L • 6/14
E.

Venting Guidelines

• The minimum vertical rise off the top before an elbow is 2 ft.
(609 mm).
• The maximum horizontal vent run is 20 ft. (6m) when the
vertical vent rise is 10 ft. (3m).
• The minimum horizontal vent run is 6 in. (152mm).
• Horizontal sections require a 1/4 in. (6mm) rise for every 12
in. (305 mm) of horizontal travel.
• Exterior Vent Diameter = 6-5/8 in. (168mm); Inner Vent
Diameter = 4 in. (102mm).
• Horizontal sections require non-combustible support every
3 ft. (914mm), e.g. wall straps.
• For any vertical termination a minimum of 6 ft. (2m) vertical
must be used.
EXCEPTIONS FOR HORIZONTAL INSTALLATIONS:
*When installing in a rear vent configuration with no
vertical rise, a Snorkel Kit must be used. Refer to venting
components. A derating orifice must be installed with a rear
vent configuration with no vertical rise. The appropriate
orifice is supplied with the rear vent kit.
*The maximum horizontal vent run is 3 ft. (914mm).
*The maximum horizontal vent run with a 45° elbow is 2 ft.
(609mm).
*The minimum horizontal vent run is 6 in. (152mm).
INDIVIDUAL INSTALLATIONS MAY VARY. PERCENTAGE
CLOSED BASED ON FULL RANGE OF DAMPER TRAVEL.
NOTE: IF YOUR INSTALLATION FALLS WITHIN A SHADED
AREA ON THE GRAPH, THE DAMPER MUST BE USED.* SEE
INFORMATION ON DAMPER ADJUSTMENT ON PAGE 31.
*In the Commonwealth of Massachusetts, the word damper
shall be replaced with the words flue restrictor.
Part: SLK-991DA
40'
39'
38'
37'
36'
35'
34'
32'
30'
28'
Damper position
26'
more CLOSED in
this area
24'
22'
20'
18'
16'
Damper position
more OPEN in
14'
this area
'
12
10'
8'
6' No damper
in this area
4'
2'
2' 4' 6 ' 8' 10'
6 in. (152mm) Minimum / 3 ft. (914mm) Maximum
Horizontal run with no vertical pipe and with 1/4 in
C
L (6mm) rise per foot. Must use Snorkel cap.
6 in. (152mm) Minimum starter pipe
For rear vent or top of
appliance for top vent
Part: SLK-011TRD
12' 14' 15' 16' 17' 18' 19' 20'
11