Determining Equivalent Pipe Length - Whitfield quest Owner's Manual And Operating Instructions

DETERMINING EQUIVALENT PIPE LENGTH

To determine whether a 3" or 4" exhaust system is required for your installation, review the
sample installation below. Fill out the top chart, and calculate your total equivalent pipe length.
After you have the total equivalent pipe length, use the chart at the bottom of the page to deter-
mine if your installation requires 3" or 4" exhaust pipe.
Type of Pipe # of Elbows or Feet of pipe
o
90
o
45
Horizontal
Vertical
A - 90 Deg. Elbow
B- 1' Horizontal Pipe
C- 45 Degree Elbow
D- Standoff Braces
Pipe Selection Chart
30
4 INCH DIAMETER ONLY
20
10
3 OR 4 INCH DIAMETER
0
1 2 3 4
Altitude in Thousands of Feet
(Figure 22)-Equivalent Length versus Altitude Chart
Sample Installation Chart
Type of Pipe
o
90 Elbows/Tee(A &F)
o
45 Elbows(C)
Horizontal Pipe(B&E)
Vertical Pipe(D)
Elbows
Elbows
Pipe
Pipe
E- 8' Vertical Pipe
F- 2' Horizontal Pipe
G- 90 Degree Tee
H- Wall Thimble
5 6 7 8 9 1 0
# of Elbows or
Feet of pipe
2
1
3
8
Installation Guidelines (cont.)
Equivalent Feet Total Equivalent Feet
x 5(1.5m)
x 3(1m)
x 1(.3m)
x 5(.15m)
NOTE: For the example installations
above, 4 inch diameter pipe would be used
for installations at altitudes above 3,000
feet; 3 or 4 inch pipe would be suitable
below 3,000 feet.
(Figure 21)-Sample Pipe Configuration
Equivalent Feet Total Equivalent Feet
x 5 ft. (1.5m)
x 3 ft. (1m)
x 1 ft. (.3m)
x .5 ft. (.15m)
20
B
A
D
E
F
G
H
10 (3m)
3 (1m)
3 (1m)
4 (1.2m)
TOTAL: 20
C