Venting Through An Existing System - Westinghouse WGR-076 Series Installation, Start-Up, Maintenance, Parts, Warranty

SIDE VIEW
FRONT VIEW
SIDE VIEW
Figure 10 - Horizontal (Snorkel) Venting
NOTES:
A. For every 1" of overhang, the exhaust vent must be located 1"
vertical below overhang (overhang means top of building structure
and not two adjacent walls [corner of building]).
B. Typical installations require 12" minimum separation between
bottom of exhaust outlet and top of air intake.
C. Maintain 12" minimum clearance above highest anticipated snow
level or grade (whichever is greater).
D. Minimum 12" between vents when installing multiple vents.
E. 12" minimum beyond air intake.
FRONT VIEW
Figure 11 - Unbalanced Venting - Roof Exhaust and Sidewall Intake
NOTE: These drawings are meant to demonstrate system
venting only. The installer is responsible for all equipment and
detailing required by local codes.
All vent pipes must be glued, properly supported, and the
exhaust pitched a minimum of 1/4" per foot back to the heater
to allow drainage of condensate. When placing support brackets
on vent piping, the first bracket must be within 1 foot of the
water heater and the balance of 4 foot intervals on the vent
pipe. Venting must be readily accessible for visual inspection
from the first three feet from the heater.

2. Venting Through an Existing System

This heater may be vented through an existing unused vent
system. The inner diameter of the existing vent system is
utilized for the combustion air source. Two methods have been
approved for such venting: Concentric Venting Through an
Existing System and Venting as a Chase.
Vent / Air Inlet Size
LP-325-PP
Table 9 - Minimum Existing Vent / Chase Sizing
03/03/11
Do not install the heater into a common existing vent with
any other appliance. This will cause flue gas spillage or heater
malfunction, resulting in substantial property damage, serious
personal injury, or death.
UNBALANCED VENTING
WITH TEE (INTAKE) AND
COUPLING (EXHAUST)
Minimum Existing Vent / Chase Size
2"
3"
4"
21
4"
5"
7"
WHL-001 Rev. 3.16.15