Hearth & Home Technologies TIARAI-BK-B User Manual

Page  12

August 1, 2008

Heat & Glo · Tiara I B & Tiara II B · 7010-149M

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 fl ue vent to the center of the 90° elbow is 7 ft. (2m), the 
horizontal run to the outer wall fl ange must not exceed 16 
ft. (5m).

.

Example 2:  If the vertical dimension from the center line of 
the fl ue vent is 21 ft. (6m), the horizontal run to the outer wall 
fl 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.).

•  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 noncombustible support 

every 3 ft. (914mm), e.g. wall straps.

•  For any vertical termination a minimum of 6 ft. (2m) 

 

vertical must be used.

SLK-01TRD 

Example 1 

Example 2 

2'           4'          6 '          8'          10'         12'        14'   15'  16'  17'  18'  19'  20' 

2' 

4' 

6' 

8' 

10' 

12 

' 

14' 

16' 

18' 

20' 

22' 

24' 

26' 

28' 

30' 

32' 

34' 

35' 

36' 

37' 

38' 

39' 

40' 

Part #SLK-991DA 

3 ft. (914mm) Maximum Horizontal run with no vertical pipe 
and with 1/4 in. (6mm) rise per foot. Must use Snorkel cap. 

6 ft. (2m) Minimum V ertical T erminatio 

n 

For rear vent or top of 
stove for top vent. 

6 in. (152mm) Minimum starter pipe 

40 ft. (12m) 

Maximum V ertica 

l 

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.