John Wood Power Direct Vent (Non-ENERGY STAR qualified models) User 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 lat-
est edition of “Natural Gas and Propane Installation
Code” CAN/CSA-B149.1 (Canada), or “National Fuel Gas
Code” ANSI Z223.1 (NFPA 54) (U.S.A.).
The following requirements are illustrated in Figure 6:
1. (“A”) Minimum 2.1m (7 ft.) above a paved sidewalk or

paved driveway that is located on public property.

2. (“B”) Minimum 900mm (3 ft.) above any forced air or

mechanical air supply inlet located within 1.8m (6 ft.)
horizontally (Canada) or 3m (10 ft.) (U.S.A.).

3. (“C”) Not within 900mm (3 ft.) from any gas service reg-

ulator vent outlet.

4. ("D") Minimum 900 mm (3ft) horizontally of the vertical

centerline above the regulator vent outlet to a maximum
vertical distance of 4.5m (15ft).

5. (“E”) Minimum 305mm (1 ft.) above grade level or antic-

ipated snow level.

6. (“F”) Not within 305mm (1 ft.) of any window or door that

can be opened, of any non-mechanical air supply inlet
or of the combustion air inlet of any other appliance.

7. (“G”) Minimum 305mm (1 ft.) distance between the top

of the vent termination and the underside of a veranda,
porch or deck.

8. The manufacturer recommends the vent termination

shall not be mounted directly above or within 900mm (3
ft.) horizontally from an oil tank or gas meter to avoid
potential freeze-up from condensation.

9. (“J”) The manufacturer recommends the vent terminal

not to be installed closer than 900mm (3 ft.) from an
inside corner or 610mm (2 ft.) from outside corner on an
“L” shaped structure.

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 lat-
est edition of “Natural Gas and Propane Installation
Code” CAN/CSA-B149.1 (Canada), or “National Fuel Gas
Code” ANSI Z223.1 (NFPA 54) (U.S.A.) and local codes.

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Figure 6 Vent Terminal Installations

GAS METER AND
REGULATOR

MECHANICAL AIR
SUPPLY INLET

1.8m (6 ft.) (Canada),

3m (10 ft.) (U.S.A.)