R

Castile 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.

Figure 12.1.

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.

3 ft.

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

45o Elbow

 

 

 

X

3

 

Horizontal Pipe

 

7

 

X

1

7

Vertical Pipe

 

2

 

X

0.5

1

 

 

 

 

Total Equivalent Feet

23

2 ft.

 

Note: This is a generic example and is not

 

 

 

intended to represent any specific fuel type.

Figure 12.1

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. Figure 12.2.

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 required.

The chart reveals that a 90° elbow is 5 times as restric- tive to the flow of exhaust gases under positive pres- sure 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 12.2

Page 12

250-7251F

September 1, 2008

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Hearth and Home Technologies CASTINS-CSB, CASTINS-CWL Castile Pellet Insert Equivalent Feet of Pipe, Pipe Selection Chart
Page 11 Page 13

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