WARNING! DO NOT USE 2” VENT WITH EF100T250/300 MODELS
Figure 14. Vent Terminal (Low Ground Clearance)
Maximum Vent Length:
Direct Vent Maximum Vent Length (Combined Maximum Length for Intake and Exhaust)
Model Number | Max Vent | Max Vent | Max Vent | |
Length (feet) 2” | Length (feet) 3" | Length (feet) 4" | ||
| ||||
EF60T125, EF100T150 | 30 | 120 | 170 | |
EF60T150, EF100T199 | 30 | 100 | 150 | |
EF60T199 | 30 | 80 | 130 | |
EF100T250 | N/A | 80 | 130 | |
EF100T300 | N/A | 60 | 110 | |
| Table 3 |
|
|
WARNING
The EF100T250 and EF100T300 models are not approved for 2 inch diameter vent pipe. Venting with 2 inch pipe on these models may result in damage to the water heater or cause an unsafe condition. DO NOT use 2 inch Vent or Air Intake Pipe on EF100T250/300 models.
Note: The venting distance shown in the chart above is the combined maximum distance for the intake and exhaust pipe and elbows. The intake and exhaust vent terminals may be in different locations (i.e., different walls or one wall, one roof) provided the intake equivalent venting distance does not exceed the exhaust by more than 30 feet.
Determining required vent length:
1.Determine the total length of straight vent pipe (in feet) required for both the intake and the exhaust.
2.Add 5 feet of venting for every 90° elbow.
3.Add 2 ½ feet of venting for every 45° elbow.
4.Total vent length cannot exceed “Max Vent Length” in Table 3.
5.Air intake cannot exceed exhaust by more than 30 feet in any venting situation.
Example of Total Direct Vent Length for EF100T199:
A 3” venting system has a total of six
Equivalent vent length for elbows: 6 x 5 feet = 30 feet.
Total equivalent vent distance = 65 feet + 30 feet = 95 feet total equivalent vent length. This is below the maximum allowed distance of 100 feet for this model using 3” vent.
NOTICE
Do not include the 3” condensate elbow or vent terminals in determining maximum vent length.
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