D. How to Use the Vent Graph

E. Venting Guidelines

1.Measure the vertical distance from the center line of the flue pipe 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 9 ft.-8 in. (3m).

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 4 ft.-3 in. (1m).

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 15 ft. (5m) 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.; 15 ft. max. - 6 ft. = 9 ft. max.).

NOTES

The maximum horizontal vent run is 15 ft. (5m) when the vertical vent rise is 10 ft. (3m).

Horizontal sections require a 1/4 in. (6mm) rise for every 12 in. (305mm) 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 in. (152mm) vertical must be used.

EXCEPTIONS

FOR HORIZONTAL INSTALLATIONS:

The maximum horizontal vent run is 30 in. (762mm).

The maximum horizontal vent run with a 45° elbow is 18 in. (457mm).

No external minimum rise is required.

The minimum horizontal vent run is 6 in. (152mm).

NOTE: If your installation falls within the gray-shaded area on graph, see information on intake damper operation, on page 36.

*In the Commonwealth of Massachusetts, the word damper shall be replaced with the words flue restrictor.

25 ft. (8m)

25'

 

 

 

 

 

 

 

 

Maximum Vertical

24'

 

 

 

 

 

 

 

 

Example 2

22'

 

 

 

 

 

 

 

 

 

20'

 

 

 

 

 

 

 

 

 

18'

Adjust

 

 

 

 

 

 

 

 

16'

Intake

 

 

 

 

 

 

 

VERTICAL DISTANCE

Damper

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

14'

 

 

 

 

 

 

 

 

FROM APPLIANCE TO

 

Install Flue

 

 

 

 

 

 

 

 

 

 

90° ELBOW

12'

 

 

Restrictor

 

 

 

 

 

10'

 

 

 

 

 

 

 

 

Example 1

8'

 

 

 

 

 

 

 

Termination

 

 

 

 

 

 

 

 

 

6'

 

 

 

 

 

 

 

cap

 

 

 

 

 

 

 

 

 

6 ft. (2m) Minimum

4'

 

 

 

 

 

 

 

 

Vertical Termination

 

 

 

 

 

 

 

 

2'

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C

 

 

 

 

 

 

 

 

 

L

 

2'

4'

6'

8'

10'

12'

14'

15'

 

 

 

 

 

 

Termination Cap

 

 

 

 

6 in. (152mm)

 

30 in. (762mm) Maximum Horizontal run with no

 

Minimum starter pipe

vertical pipe and with 1/4 in. (6mm) rise per foot.

Figure 5.2

 

 

 

Must use approved Termination Cap.

August 1, 2008

Quadra-Fire · Garnet-T · 7016-127F

Page 11

Page 10 Page 12
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Quadra-Fire GARNET-D-PMH, GARNET-MBK How to Use the Vent Graph Venting Guidelines, Exceptions For Horizontal Installations
Page 10 Page 12

GARNET-D-CSB, GARNET-D-CWL, GARNET-MBK, GARNET-D-MBK, GARNET-D-PMH specifications

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