Equivalent Feet Of Pipe; Pipe Selection Chart - Quadra-Fire PS35-C Installation Manual

G. 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 18.1).
2 ft.
3 ft.
2 ft.
Figure 18.1
H. Pipe Selection Chart
The chart will help you in determining proper venting
size according to the equivalent feet of pipe calculated
previously and the altitude above sea level of this
installation (Figure 18.2).
1. Locate the calculated equivalent feet of pipe on the
vertical left side of the chart.
2. Move to the right horizontally on the chart until you
reach your altitude above sea level.
3. If you fall below the diagonal line, 3 or 4 inch (76 to
102mm) pipe may be used.
4. If it is anywhere above the diagonal line, a 4 inch
(102mm) diameter pipe is required.
NOTICE:
• A 90° elbow is 5 times as restrictive to the flow of
exhaust gases under positive pressure as 1 foot
(305mm) of horizontal pipe.
• A foot of horizontal pipe is twice as restrictive as a
foot of vertical pipe.
WARNING
Risk of Fire!
• Only LISTED venting components may
be used.
• NO OTHER vent components may
be used.
• Substitute or damaged vent components
may impair safe operation.
18
Example of 3 Elbow-Rear Vent Termination Calculation
Pellet
Venting
Component
90° Elbow
or Tee
45° Elbow
Horizontal
Pipe
Vertical
Pipe
2 ft.
Table 18.1
NOTE: This is a generic example and is not intended to represent any
# of Feet of
Elbows Pipe
3
7
2
specific fuel type.
Example 1 Example 1
Equivalent Pipe Equivalent Pipe
Length In Feet Length In Feet
Example 2 Example 2
Figure 18.2
• 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.
Risk of Injury or Property Damage.
•
•
•
7058-804C
WARNING
Vent surfaces get HOT, can cause burns
if touched. Non-combustible shielding or
guards may be required.
Multiplied Equivalent
By Feet
X 5
X 3
X 1
X 0.5
Total Equivalent Feet
30
4 in. (102mm) Diameter Pipe Only 4 in. (102mm) Diameter Pipe Only
20
10
3 in. or 4 in. (76mm or 3 in. or 4 in. (76mm or
102mm) Diameter Pipe 102mm) Diameter Pipe
0
1 2 3 4 5
ALTITUDE IN THOUSANDS OF FEET ALTITUDE IN THOUSANDS OF FEET
WARNING
Improper installation, adjustment,
alteration, service or maintenance can
cause injury or property damage.
Refer to the owner's information manual
provided with this appliance.
For assistance or additional information
consult a qualified installer, service
agency or your dealer.
Components
Equivalent
Feet
15
7
1
23
6 7 8 9 10
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