Hearth and Home Technologies CASTILE-GAS-CWL How to Use the Vent Graph Venting Guidelines

D. How to Use the Vent Graph		E. Venting Guidelines
1. Measure the vertical distance from the top of appliance		NOTES
	to the center of the 90° elbow. On the graph below, draw	The maximum horizontal vent run is 20 ft (6m) when
	a horizontal line from that measurement on the vertical	the vertical vent rise is 10 ft. (3m).
	axis across until it intersects with the slanted line.	The minimum horizontal vent run is 6 in. (152mm).
2.	From the point of this intersection, draw a vertical line to
		Horizontal sections require a 1/4 in. (6mm) rise for
	the bottom of the graph.
		every 12 in. (305 mm) of horizontal travel.
3.	The point at which this line meets the bottom line of the
		Exterior Vent Diameter = 6-5/8 in. (168mm); Inner
	graph is the maximum length of the horizontal run.
		Vent Diameter = 4 in. (102mm).
EXAMPLE 1: If the vertical dimension from the center line of		Horizontal sections require noncombustible support
the flue vent to the center of the 90° elbow is 7 ft. (2.13 m),		every 3 ft. (914mm), e.g. wall straps.
the horizontal run to the outer wall flange must not exceed		For any vertical termination a minimum of 6 ft. (2m)
16 ft. (5m).		vertical must be used.
EXAMPLE 2: If the vertical dimension from the center line of		Minimum vertical from appliance top before adding
		an elbow is 2 in. (51mm).
the flue vent is 21 ft. (6m), the horizontal run to the outer wall
flange must not exceed 12 ft. 10 in. (4m).		EXCEPTIONS FOR HORIZONTAL INSTALLATIONS:
4. Each 90° elbow is equivalent to 3 ft. (914mm) of vent		*Wheninstallingthisapplianceinarearventconfiguration
		with no vertical rise, a Snorkel Kit must be used.
	pipe and each 45° elbow is equivalent to 1 ft. (305mm)	*The maximum horizontal vent run is 3 ft. (914mm)
	of vent pipe, and must be subtracted from vent pipe
	run. A single vertical to horizontal 90° elbow is already	*The maximum horizontal vent run with a 45° elbow is 2
	calculated into the allowable 20 ft. (6m) run. Each	ft. (609mm).
	additional 90° elbow reduces the maximum horizontal	*The minimum horizontal vent run is 6 in. (152mm).
	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.).

NOTE: IF YOUR INSTALLATION FALLS

Part #SLK-991DA

40 ft. Maximum Vertical

WITHIN

A

SHADED

AREA

ON

THE

40'

39'

GRAPH, THE DAMPER MUST BE USED.

38'

37'

SEE

INFORMATION

ON

DAMPER

36'

35'

ADJUSTMENT ON PAGE 34.

34'

32'

30'

NOTE:

In

the

Commonwealth

of

28'

Damper position

26'

more CLOSED in

Massachusetts,

the

word

damper

24'

this area

Example 2

shall be replaced with the words flue

22'

restrictor.

20'

18'

VERTICAL DISTANCE FROM

16'

Damper position

APPLIANCE TO 90° ELBOW

14'

more OPEN in this

12'

area

10'

Example 1

8'

HHW2

No Damper

6'

4'

in this area

2'

2'

4'

6 '

8'

10'

12'

14'

15'

16'

17'

18'

19'

20'

6 ft. Min. Vertical
Termination	3 ft. (91 cm) Maximum Horizontal run with no
	vertical pipe and with 1/4 in. (6.35 mm) rise per
C	foot. Must use Snorkel cap.
L

CL For rear vent or top of stove for top vent.

6 in. Min. starter pipe

Figure 5.2

September 1, 2008 Quadra-Fire · Castile Gas Stove · 7023-111E Page 11