Quadra-Fire Mastering the Vent Graph for Your Sapphire Stove

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 flue vent to the center of the 90° elbow is 7 ft. (2 m), the horizontal run to the outer wall flange must not exceed 13 ft. 2 in. (5m).

EXAMPLE 2: If the vertical dimension from the center line of the flue vent is 21 ft. (6m), the horizontal run to the outer wall flange must not exceed 10 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 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.)

E. Venting Guidelines for Horizontal Runs

Standard Horizontal Run

Max Horizontal Run,	3 ft (914mm)
Rear Vent
Max Horizontal Run	15 ft (5m) when vertical rise is
	10 ft (3m
Max Horizontal Run	14 in. (356mm)
with 45o Elbow
Min Horizontal Run	11 in. (279mm)
Max Wall Thickness	20 in. (508mm)
Min Wall Thickness	4 in. (102mm)
Exterior Vent Diameter	6-5/8 in. (168mm)
Inner Vent Diameter	4 inches (101mm)
Rear Vent with Vertical	Min of 2 ft vertical (610mm)
Rise	must be used prior to any hori-
	zontal run

Horizontal Run requires a 1/4 in. (6mm) rise for every 1 ft toward the termination.

Horizontal Run requires a non-combustible support every 3 ft (914mm), i.e., plumbing tape

Horizontal Run with Snorkel Kit.

A rear vent configuration with 3 ft. (914mm) maximum horizontal run with no vertical pipe and with 1/4 in. (6mm) rise per foot.

40 ft. (12m)	40'
Maximum Run if	38'
using Stainless
	36'
Steel Inner Pipe
Material	34'
30 ft. (9m) Maxi-	32'
mum Run if using	30'
Aluminum Inner	28'
Pipe Material			Flue Restrictor more
	26'
			CLOSED in this area
	24'
Example 2
	22'
	20'
Vertical Distance	18'		Flue Restrictor
from Appliance Top	16'
to 90o Elbow	14'		50% CLOSED in
			this area
	12'
Example 1	10'
	8'
	6'		Flue Restrictor
	4'		OPEN in this area
	2'
	0'	11"	2'	4'	6'	8'	10'	12'	14'	15'
		(MIN)							(MAX)

Figure 5.2	TOTAL HORIZONTAL RUN TO THE OUTER
	WALL FLANGE (EXCLUDING ELBOWS)

•A snorkel kit must be used. Figure 5.3 below and

Figure 5.4 on page 12.

•A derating orifice must be installed. The appropriate orifice is supplied with the rear vent kit.

Snorkel Kit

C

L

Figure 5.3

NOTE: IF YOUR INSTALLATION FALLS WITHIN A SHADED AREA ON THE GRAPH, THE FLUE RESTRICTOR MUST BE USED.

INDIVIDUAL INSTALLATIONS MAY VARY.

Percentage closed based on full range of the flue restric-

tor travel.

WARNING! Fire Risk!

•Never allow the vent to run downward.

•This could cause high temperatures and may present the possibility of a house or structure fire.

Quadra-Fire • Sapphire • 7055-116 Rev. D • 6/11 11