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NOTICE
For installations in Canada, field supplied vent piping must comply with CAN/CGA B149.1 (latest
edition) and be certified to the Standard For Type BH, Class II, 65°C, Gas Venting Systems, ULC
S636. Components of this listed system must not be interchanged with other vent systems or
unlisted pipe/fittings. All components and specified primers and cements of the certified vent
system must be from a single system manufacturer and not intermixed with other system
manufacturer’s vent system parts. The supplied vent connector and vent termination are certified
under ULC S636 and are also certified as part of the water heater. Refer to the following tables
for approved venting materials, primers, and cements. All approved primers and cements are to
be used within their marked time limitations.
This water heater is a Powered Direct Vent Gas Water Heater where all air for combustion is obtained from the outside
atmosphere and all flue gases are discharged to the outside atmosphere. The venting system consists of separate
combustion air intake and flue exhaust pipes. Venting may be run horizontally through an outside wall or vertically
through a roof through 3” (7.6 cm) or 4” (10.2 cm) diameter pipe for models with input ratings under 200,000 Btu/hr.
Models with input ratings over 200,000 Btu/hr. (check the model nameplate) must use 4” (10.2 cm) diameter pipe only.
The water heater is supplied with a screened intake and exhaust 90° elbow referred to as the exhaust vent or combustion
air intake terminal (see figure 5). Consult the venting table in this section for the maximum venting distances with 3” (7.6
cm) and 4” (10.2 cm) pipe.
Note: The combustion air intake must be piped to the outdoors as outlined in the following instructions in order
for this appliance to be a direct vent water heater.
Approved Venting Materials
For installations in the US only
PVC (ASTM D-2241 Schedule 40,
ASTM D-1785; or Cellular Core
Schedule 40 DWV, ASTM F-891)
CPVC (ASTM F-411 Schedule 40)
ABS (ASTM D-2235)
All fittings (other than the components
supplied with the water heater) should
be equivalent to: PVC-DWV (ASTM-F-
2665), CPVC (ASTM F-438), or ABS
(ASTM D-266/3311)
For installations in CANADA
ULC S636 approved CAN-COM
VENTING SYSTEM schedule 40 PVC
for flue gas venting rated Class II, 65°C
(components provided with water
heater)
IPEX ULC S636 approved schedule 40
PVC (all other vent pipe/ fittings)
Approved Primers and Cements
For installations in the US only
PVC and CPVC Primer (ASTM F-656)
PVC and CPVC Cement (ASTM D-2564)
ABS Primer and Cement (ASTM D-
2235)
For installations in CANADA
IPEX ULC S636 approved PVC Primer
and Cement for flue gas venting rated
Class II, 65°C