John Wood Superflue Power Vent (before FVIR technology) - Manual (Page 6)

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1. EACH 2” (50mm) 90° ELBOW USES 5 EQUIVALENT FEET (1.5 METERS).
2. EACH 3” (75mm) 90° ELBOW USES 7 EQUIVALENT FEET (2.1 METERS).
3. ONE 2” (50mm) 45° LONG-RADIUS ELBOW IS EQUIVALENT TO 3’ (.9 METERS) OF 2” (50mm) STRAIGHT PIPE.
4. ONE 3” (75mm) 45° LONG RADIUS ELBOW IS EQUIVALENT TO 4’ (1.2 METERS) OF 3” (75mm) STRAIGHT PIPE.
5. MINIMUM DISTANCE BETWEEN ELBOWS IS 6” (150mm)
6. DO NOT MISMATCH VENTING MATERIALS.
Table VI
In the U.S.:
– the vent terminal shall terminate not less than 3’
above any forced air inlet duct.
– the vent terminal shall terminate not less than 4’
below, 4’ horizontally, or 1’ above any door, window
or gravity air inlet into any building.
– the vent terminal shall be located not less than 1’
above grade.
– the vent terminal shall not exit into a public walk-
way.
– in locations where high snow accumulations occur,
or where the exit from the building is less than 1’
above grade, a vent riser may have to be installed.
See Figure 6 for recommended practices.
Vent Termination
1. Drill a hole through the exterior wall, slightly larger
than the vent piping, to allow for final alignment of
the vent piping to the heater.
2. Attach the termination elbow to a short length of vent
pipe – approximately 2’ minimum, 5’ maximum.
3. Push this pipe through the wall from the outside
until the joint with the elbow is within 1” – 2” of the
outside face of the wall.
4. Point the elbow down and hold the pipe temporari-
ly in position with a small wedge or a splinter of
wood.
5. Proceed to construct vent pipe connections to the
water heater.
CAULK
CAULK
ATTACH 90° TERMINATION
ELBOW
12” MIN.
GROUND LEVEL OR MAXIMUM SNOW LINE
ILLUSTRATION OF VENT TERMINATION
EXTERIOR INSTALLATION
Figure 3 - 1
ALLOWABLE VENT LENGTHS AND MATERIALS
(BOTH VERTICAL AND HORIZONTAL VENTING)
WATER
HEATER
MODEL
SUFFIX
NVH, PVH -0.15 in.
wc
CPVC, ABS
VENT PIPE
SIZE
PRESSURE
SWITCH
SETTING
(in . W.C.)
VENT
MATERIAL
(SCHEDULE 40)
in. (mm)
2” (50)
NVH, PVH - 0.15 in.
wc
CPVC, ABS 3” (75)
G40
G50
G60
SNV, SPV
- 0.55 in.
wc
CPVC, PVC, ABS 3” (75) G5065
MAXIMUM EQUIVALENT
VENT LENGTH
50 FEET (15.2 METERS)
+TERMINATION ELBOW
80 FEET (24.4 METERS)
+TERMINATION ELBOW
50 FEET (15.2 METERS)
+TERMINATION ELBOW
3 FEET (0.91 METERS) +
ONE 90° ELBOW +TERMI-
NATION ELBOW
50 FEET (15.2 METERS)
+TERMINATION ELBOW
2 1
/ 2
FEET (0.76 METER) +
ONE 90° ELBOW +TERMI-
NATION ELBOW
MINIMUM EQUIVALENT
VENT LENGTH