Equivalent Feet Of Pipe; Pipe Selection Chart - Quadra-Fire CB1200M-MBK Installation And Operation Maintenance

R
D. 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 13.1.
3 ft
(914mm)
2 ft (609mm)
Figure 13.1
E. Pipe Selection Chart
The chart will help you in determining proper
venting size according to the equivalent feet of
pipe calculated above and the altitude above sea
level of this installation. 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) diam-
eter pipe is required.
The chart reveals that a 90° elbow is 5 times as
restrictive to the fl ow 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.
WARNING
Fire Risk.
Do NOT pack insulation or other
combustibles between fi restops.
• ALWAYS maintain specifi ed clearances
around venting and fi restop systems.
• Install fi restops as specifi ed.
Failure to keep insulation or other material
away from vent pipe may cause fi re.
May 6, 2015
Example of 3 Elbow-Rear Vent Termination Calculation
2 ft (609mm)
2 ft (609mm)
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
qualifi ed installer, service agency or your dealer.
Pellet Venting # of Feet of
Component Elbows Pipe
o
90 Elbow or Tee 3
o
45 Elbow
Horizontal Pipe 7
Vertical Pipe 2
Note: This is a generic example and is not
intended to represent any specifi c fuel type.
30
Example 1
20
Equivalent Pipe
Length In Feet
Example 2
10
3 in. or 4 in. (76mm or 102mm) Diameter Pipe
0
1
ALTITUDE IN THOUSANDS OF FEET
Figure 13.2
Example 1: If the equivalent length of pipe is 23 feet
(7m)with altitude of 8,000 feet (2438m) you must use
4 inch (102mm) diameter type "L" or "PL" vent.
Example 2: If the equivalent length of pipe is 12 feet
(3.7m) with altitude of 6,000 feet (1829m) you may
use 3 or 4 inch (76 to 102mm) diameter type "L" or
"PL" vent
7014-179K
CB 1200 Pellet Stove
WARNING
Multiplied Equivalent
By Feet
X 5
X 3
X 1
X 0.5
Total Equivalent Feet
4 in. (102mm) Diameter Pipe Only
2 3 4 5 6 7
Components
Equivalent Feet
15
7
1
23
8 9 10
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