Bradford White EverHot TGHE-160I-NX Installation And Operation Instruction Manual page 25

Vent pipes serving power vented appliances are classified by building codes as "vent connectors."
Required clearances from combustible materials must be provided in accordance with information in this
manual under Location of Water Heater and Clearances, as well as the National Fuel Gas Code and local
codes.
Table 7. Venting Table - Examples of Maximum Venting Distances.
Maximum Straight
Pipe Distance
41 ft (12.5 m)
35 ft (10.7 m)
29 ft (8.8 m)
23 ft (7.0 m)
17 ft (5.2 m)
11 ft (3.4 m)
5 ft (1.5 m)
Each 90º elbow is equivalent to 6 ft (1.8 m) in straight vent pipe length. Each 45 degree elbow is
equivalent to 3 ft (0.9 m) in straight pipe length. The total maximum equivalent vent pipe distance
cannot exceed 41 feet (12.5 m).
VENTING SYSTEM LAYOUT
Refer to the preceding illustration and location requirements for location of the vent terminal and also
local and state codes. In the absence of local codes, refer to the latest edition of the National Fuel Gas
Code ANSI Z223.1/NFPA 54 (latest edition) or Canadian Installation Codes CAN/CGA-B149 (latest
edition). Keep the venting system as short as possible and keep the number of elbows used to a
minimum. The water heater may be vented directly through the wall (horizontally) or vertically through the
roof. In all cases, the maximum equivalent length of vent pipe allowed is 41 feet (12.5 m). To calculate
the total equivalent feet of vent pipe use the following formula:
D = L + (EL90 x 6) + (EL 45 x 3)
D = L + (EL90 x 1.8) + (EL45 x 0.9)
D = Total Equivalent Length of Venting System
L = Length of Straight Section of Vent / Air Intake Pipe (in feet)
EL90 = Number of 90º Elbows.
EL45 = Number of 45º Elbows
The venting table above provides examples of maximum venting distances with various elbow
combinations.
The Bradford White EverHot
must be ordered separately.
components later in this manual to determine the venting system layout and parts required. A Standard
Vent Kit is available for outside through the wall venting installations. The Standard Vent Kit consists of:
one 90 discharge adapter and one horizontal vent termination kit. If this type of vent installation is not
possible, contact a venting supplier listed in this manual for additional venting components illustrated at
the back of this instruction manual.
VENTING SYSTEM INSTALLATION
Reference the preceding section and venting components illustrations at the end of this manual to
determine the parts required for your particular venting system installation.
component parts are available from the suppliers listed in this manual.
Installation Instructions supplied with the venting components for detailed instructions on putting together
the venting components.
Number of 90º Elbows
0
1
2
3
4
5
6
NOTICE
For Length in Feet
For Length in Meters

TGHE model series has dedicated venting system components, which
Review the "Venting System Installation Instructions" and the venting
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Maximum Total Equivalent
Length of Vent Pipe
41 ft (12.5 m)
41 ft (12.5 m)
41 ft (12.5 m)
41 ft (12.5 m)
41 ft (12.5 m)
41 ft (12.5 m)
41 ft (12.5 m)
The required venting
Use the Venting System