Giant Factories ANSI Z21.10.3 Owner's Manual page 18

TWIN PIPE VENTING GUIDE
Option 2: Maximum Vent Length Tables (continued)
Table 13: Propane Units
Total Equivalent Vent Length (Intake/outlet) for Twin Pipe three (3) inch (7.6 cm) PVC/CPVC
Maximum Vent Length
Termination Type
Termination Equivalent Length
in feet (meters) (Already factored into the
straight pipe lengths below)
# of 90° Elbows (each: 5 equivalent feet)
0
1
2
3
4
5
6
Table 14: Propane Units
Total Equivalent Vent Length (Intake/outlet) for Twin Pipe four (4) inch (10.2 cm) PVC/CPVC
Maximum Vent Length
Termination Type
Termination Equivalent Length
in feet (meters) (Already factored into the
straight pipe lengths below)
# of 90° Elbows (each: 5 equivalent feet)
0
1
2
3
4
5
6
**Dip switch one (bank of eight (8) - TAN COLORED) off for lenths greater than or equal to twenty-one (21) feet (6.4 m).
Maximum vent lengths are specific to the fuel type of the tankless water heater. It is imperative when performing equivalent vent length
calculations, that the gas type be taken into consideration.
IPEX Concentric Snorkel
Vent Kit Termination
20 (6.1) 10 (3.0)
Max. straight pipe vent length in feet (meters)
21 (6.4) ** 31 (9.4) **
16 (4.9) ** 26 (7.9) **
11 (3.4) ** 21 (6.4) **
6 (1.8) ** 16 (4.9) **
11 (3.4) **
6 (1.8) **
IPEX Concentric Snorkel
Vent Kit Termination
20 (6.1) 10 (3.0)
Max. straight pipe vent length in feet (meters)
45 (13.7) ** 55 (16.8) **
40 (12.2) ** 50 (15.2) **
35 (10.7) ** 45 (13.7) **
30 (9.1) ** 40 (12.2) **
25 (7.6) ** 35 (10.7) **
20 (6.1) ** 30 (9.1) **
15 (4.6) ** 25 (7.6) **
CAUTION
WARNING
DANGER
AVERTISSEMENT
ATTENTION
18
41 feet (12.5 m)
Side Wall Tee
Termination
5 (1.5)
36 (11.0) **
31 (9.4) **
26 (7.9) **
21 (6.4) **
16 (4.9) **
11 (3.4) **
6 (1.8) **
65 feet (19.8 m)
Side Wall Tee
Termination
5 (1.5)
60 (18.3) **
55 (16.8) **
50 (15.2) **
45 (13.7) **
40 (12.2) **
35 (10.7) **
30 (9.1) **
Low Profile
Termination
5 (1.5)
36 (11.0) **
31 (9.4) **
26 (7.9) **
21 (6.4) **
16 (4.9) **
11 (3.4) **
6 (1.8) **
Low Profile
Termination
5 (1.5)
60 (18.3) **
55 (16.8) **
50 (15.2) **
45 (13.7) **
40 (12.2) **
35 (10.7) **
30 (9.1) **