Quadra-Fire CB1200I-B CB1200-I Pellet Insert Equivalent Feet of Pipe, Pipe Selection Chart

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CB1200-I Pellet Insert

C. Equivalent Feet of Pipe

The table below can help you calculate the equivalent feet of pipe which is a method used to determine pellet vent size. See

Figure 13.1

WARNING

Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to the owner’s information manual provided with this appli- ance. For assistance or additional information consult a qualified installer, service agency or your dealer.

Example of 3 Elbow-Rear Vent Termination Calculation

2 ft.	Pellet Venting	# of	Feet of	Multiplied	Equivalent	Components
	Component	Elbows	Pipe	By	Feet	Equivalent Feet
	90o Elbow or Tee	3		X	5	15
 ft.	45o Elbow			X	3
	Horizontal Pipe		7	X	1	7
	Vertical Pipe		2	X	0.5	1

Total Equivalent Feet

23

2 ft.

2 ft.	Note: This is a generic example and is not
	intended to represent any specific fuel type.

Figure 13.1

D. Pipe Selection Chart

The chart will help you in determing proper venting size according to the equivalent feet of pipe calcuated above and the altitude above sea level of this installa- tion. See Figure 13.2.

Locate the calculated equivalent feet of pipe on the vertical left side of the chart. Move to the right horizontally on the chart until you reach your altitude above sea level.

If you fall below the diagonal line, 3 or 4 inch (76 to 102mm) pipe may be used. If it is anywhere above the diagonal line, a 4 inch (102mm) diameter pipe is requried.

The chart reveals that a 90° elbow is 5 times as restrictive to the flow of exhaust gases under positive pressure as 1 foot of horizontal pipe, and a foot of horizontal pipe is twice as restrictive as a foot of vertical pipe.

30		4 in. (102mm) Diameter Pipe Only
20
Equivalent Pipe
Length In Feet
10
0	3 in. or 4 in. (76mm or 102mm) Diameter Pipe
	2	3	4	5	6	7	8	9	10
1

ALTITUDE IN THOUSANDS OF FEET

Figure 13.2

October 26, 2006 7014-083C Page 13