John Wood Power Direct Vent (ENERGY STAR) - Manual (Page 11)

Vent Terminal Installations
Important: The vent system must terminate so that proper
clearances are maintained as cited in local codes or the
latest edition of “Natural Gas and Propane Installation
Code” CSA-B149.1 (Canada), or “National Fuel Gas
Code” ANSI Z223.1 (NFPA 54) (U.S.A.).
In addition, the manufacturer recommends the vent terminal
not to be installed closer than 150mm (6 in.) from an inside
or outside corner.
Plan the vent system layout so that proper clearances are
maintained from plumbing and wiring. 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 Heater” and with the latest
edition of “Natural Gas and Propane Installation Code”
CSA-B149.1 (Canada), or “National Fuel Gas Code” ANSI
Z223.1 (NFPA 54) (U.S.A.) and local codes.
Side Wall Vent Terminal Installation
Important: When terminating the vent on a side wall, the
following specifications pertaining to terminal location must
be followed (see Figure 7).
1. The air intake terminal and the exhaust vent terminal must
terminate on the same exterior wall.
2. The vertical centerline of the air intake terminal must be
located at a minimum of 203mm (8 in.) and not more than
610mm (24 in.) from the vertical centerline of the exhaust
vent terminal.
3. The horizontal centerline of the air intake terminal may not
be located more than 100mm (4 in.) below the horizontal
centerline of the exhaust vent terminal.
Figure 7. Side Wall Vent Termination
SIDE WALL
EXHAUST
VENT
TERMINAL
INTAKE
VENT
TERMINAL
100mm
(4 in.) MAX
203mm (8 in.) MIN,
610mm (24 in.) MAX.
L
C
L
C
L
C
L
C
Vertical Vent Terminal Installation
Important: When terminating the vents through a roof, the
following specifications pertaining to terminal location must
be followed (see Figure 8).
1. The air intake termination and the exhaust vent
termination shall extend above anticipated snow level or
at least 457mm (18 in.) above the roof.
2. Must provide proper support for all pipes protruding
through roof.
3. The vertical roof terminations should be sealed with a
plumbing roof boot or equivalent fl ashing.
4. The air intake termination and the exhaust vent termination
must penetrate the same side of roof.
5. The centerline of the air intake termination and the
centerline of the exhaust vent termination must not be
closer than 203mm (8 in.) and not farther away than
610mm (24 in.).
6. The air intake terminal and the exhaust vent terminal must
be oriented facing downward and the same direction.
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