28
C199 Manual
Maximum Equivalent Vent Length Tables (continued):
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.
ATTENTION
Propane Units
Total Equivalent Vent Length (Intake/outlet) for Twin Pipe 3" PVC/CPVC
Maximum Vent Length
41 Feet
Termination Type
IPEX Concentric
Vent Kit
Snorkel
Termination
Side Wall Tee
Termination
Low Profile
Termination
Termination Equivalent Length in feet
(meters) (Already factored into the straight
pipe lengths below)
20 (6.1)
15 (3.0)
5 (1.5)
5 (1.5)
# of 90° Elbows (each: 5 equivalent feet)
Max. straight pipe vent length in feet (meters)
0
21 (6.4) **
26 (7.9) **
36 (11.0) **
36 (11.0) **
1
16 (4.9) **
21 (6.4) **
31 (9.4) **
31 (9.4) **
2
11 (3.4) **
16 (4.9) **
26 (7.9) **
26 (7.9) **
3
6 (1.8) **
11 (3.4) **
21 (6.4) **
21 (6.4) **
4
-
6 (1.8) **
16 (4.9) **
16 (4.9) **
5
-
1 (0.4) **
11 (3.4) **
11 (3.4) **
6
-
-
6 (1.8) **
6 (1.8) **
Propane Units
Total Equivalent Vent Length (Intake/outlet) for Twin Pipe 4" PVC/CPVC
Maximum Vent Length
65 Feet
Termination Type
IPEX Concentric
Vent Kit
Snorkel
Termination
Side Wall Tee
Termination
Low Profile
Termination
Termination Equivalent Length in feet (meters)
(Already factored into the straight pipe lengths
below)
20 (6.1)
15 (3.0)
5 (1.5)
5 (1.5)
# of 90° Elbows (each: 5 equivalent feet)
Max. straight pipe vent length in feet (meters)
0
45 (13.7) **
50 (15.2) **
60 (18.3) **
60 (18.3) **
1
40 (12.2) **
45 (13.7) **
55 (16.8) **
55 (16.8) **
2
35 (10.7) **
40 (12.2) **
50 (15.2) **
50 (15.2) **
3
30 (9.1) **
35 (10.7) **
45 (13.7) **
45 (13.7) **
4
25 (7.6) **
30 (9.1) **
40 (12.2) **
40 (12.2) **
5
20 (6.1) **
25 (7.6) **
35 (10.7) **
35 (10.7) **
6
15 (4.6) **
20 (6.1) **
30 (9.1) **
30 (9.1) **
**SW 1 in DIPSW 1 is “OFF” for lengths greater than or equal to 21 feet
Summary of Contents for c199e
Page 54: ...54 C199 Manual Ladder Diagram ...
Page 143: ...72 C199 Manual ...
Page 144: ...U306 1971 00 100000380 2 2015 ...