Installation Guide

Residen al Standard Gas Water Heater Use and Care Guide • 11
GETTING STARTED
Residen al Standard Gas Water Heater Use and Care Guide • 11
GETTING STARTED
Ven ng
WARNING! Carbon Monoxide
Hazard. This water heater must be
supplied with adequate air and vented
to outdoors. The vent system must be
installed by a qualifi ed person.
Examples of a qualifi ed person include
gas technicians, authorized gas
company personnel, and authorized
service technicians. Failure to properly
vent the water heater can result in
severe injury or death from carbon
monoxide poisoning.
The vent system must be installed
according to local and state codes, or
in the absence of local or state codes,
the current edi on of the Na onal Fuel
Gas Code, ANSI Z223.1 (NFPA 54). Do
not common vent this water heater
with any power vented appliance. Do
not use a vent damper anywhere in the
vent system of this water heater.
To reduce the risk of carbon monoxide
poisoning, install a fuel gas and carbon
monoxide detector. Install and maintain
the detector in accordance with the
manufacturer’s instruc ons and local
codes.
Replacing a Water Heater Using
the Exis ng Vent System
Read the “Installing a New Vent Sys-
tem” sec on of this manual and make
sure your vent system is properly in-
stalled. Inspect the exis ng vent system
for obstruc ons, corrosion, and proper
installa on. Repair or replace if neces-
sary. The exis ng vent system must be
UL listed Type B double wall or single
wall metal vent pipe of either 3 inch or
4 inch diameter and installed according
to the vent manufacturer’s instruc ons
and the terms of its lis ng. Do not use
other materials such as dryer vent hose.
Installing a New Vent System
The vent pipe must meet the following
specifi ca ons:
Type of Material
UL listed Type B double wall or single
wall metal vent pipe must be used.
Local codes may be more restric ve
and may not allow single wall vent pipe.
Single-wall vent pipe cannot be used for
water heaters located in a cs and may
not pass through a c spaces, crawl
spaces, or any confi ned or inaccessible
loca on. Single-wall vent pipe cannot
pass through any interior wall.
Clearance to Combus ble Materials
The vent pipe cannot pass through any
ceiling, fl oor, fi rewall, or fi re par  on.
Any part of the vent system must main-
tain the following clearances from any
combus ble materials:
• Single-wall vent pipe must main-
tain a six inch clearance from
combus ble materials.
• The clearance from combus ble
materials of UL listed Type B dou-
ble-wall vent pipe is specifi ed by
the manufacturer of the vent pipe.
UL listed Type B double-wall vent
pipe may pass through walls or par-
  ons constructed of combus ble
material if the minimum clearance
specifi ed by the manufacturer of
the vent pipe is maintained.
Vent Installa on
To improve the fl ow of exhaust gases,
we recommend that a minimum of 12
inches of ver cal vent pipe be installed
on the dra hood prior to any elbow.
A por on of the vent pipe (up to 75%
of the total ver cal height) can be
horizontal, but the termina on must
be ver cal. For the horizontal sec on,
install without dips or sags with an
upward slope of at least ¼ inch per
foot. Install pipe avoiding unnecessary
bends. Pipe joints must be fastened by
sheet metal screws or other approved
means. Support the pipe to maintain
clearances and to avoid separa on of
joints or other damage. Vent pipe must
be accessible for cleaning, inspec on,
and replacement.
Termina ons
If local codes allow, this water heater
may be terminated into an exis ng
chimney using the instruc ons below.
Otherwise, this water heater’s vent
must terminate ver cally (sidewall or
other horizontal termina ons are not
allowed).
Chimney Termina on
Figure 7 - Chimney termination vent system
NOTICE: Before connec ng a vent to
a chimney, make sure the chimney
passageway is clear and free of obstruc-
 ons. The chimney must be cleaned if
previously used for ven ng solid fuel
appliances or fi replaces. Also consult lo-
cal and state codes for proper chimney
sizing and applica on or, in the absence
of local and state codes, the “Na onal
Fuel Gas Code”, ANSI Z223.1(NFPA
54)-current edi on.
• The vent pipe must be installed
above the extreme bo om of the
chimney to prevent poten ally
blocking the fl ue gases.