Schwank duraSchwank - Steel STW-JZ - Manual (Page 30)

30
SPW-JZ, STW-JZ / IWP, IW
I&O Manual IM101229
RL: 12B- BA
RD: AUG 2013
 Use approved 4" (10 cm) (JA-0528-XX) or 6" (15 cm) (JA-0529-XX) horizontal wall vent ter-
minal OR a high-wind termination cap approved by a recognized certification agency
 Install any termination cap a minimum of 18 inches (45 cm) from the outside wall to the in-
side edge of terminal opening to alleviate back pressure caused by turbulent wind condi-
tions (See Fig. 20). Ensure flue gases are directed away from the structure to protect build-
ing materials from degradation by the exhausted flue gases.
 At most two 90° elbows can be installed in a horizontal vent
 Installation of the vent must prevent blockage by snow and protect building materials from
degradation by flue gases.
Clearances for horizontal flue vent :
 Will not terminate less than 1 ft (30 cm) above grade level, unless its location is adjacent
to public walkways, then it must not terminate less than 7 ft (2.1m) above the walkway.
 Below a combustible overhang or soffit:
 As indicated in FIGURE 20 for approved terminations: 4" (10 cm) JA-0528-XX or
6" (15 cm) JA-0529-XX
 For other approved terminations: Will terminate 3 ft (90 cm) or more below a combus-
tible soffit or overhang.
USA specific horizontal vent requirements:
 The vent terminal of a direct-vent appliance with an input between 10,000 Btu/hr (3 kW)
and 50,000 Btu/hr (14.7kW) shall be installed with a 9 inch (230mm) vent termination
clearance from any air opening into a building, and an appliance with an input over
50,000 Btu/hr (14.7kW) shall have at least a 12inch (300mm) vent termination clear-
ance. The bottom of the vent terminal and the air intake shall be located at least
12inches (300mm) above grade.
 A horizontal vent will not terminate:
 Less than 3 ft (90 cm) above a mechanical air inlet located within 10 ft (3.1 m)
 Less than 4 ft (1.2 m) below, 4 ft (1.2 m) horizontally from, and 1 ft (0.3 m) above
any window or door that opens, or gravity air inlet to a building
 Less than 4 ft (1.2 m) horizontal clearance from gas and electric meters, regula-
tors and relief equipment
CANADA specific horizontal vent requirements:
 A horizontal vent will not terminate:
 Within 6 ft (1.8 m) of a mechanical air supply inlet to any building.
 Above a gas utility meter and regulator assembly within 3 ft (0.9 m) horizontally of
the vertical centerline of the regulator vent outlet to a maximum vertical distance
of 15 ft (4.5 m).
 Within 3 ft (90 cm) of any gas pressure regulator vent outlet
 Within the following distances of a window or door that can be opened in any
building, of any non-mechanical air-supply inlet to any building, or of the combus-
tion air inlet of any other appliance:
 12 inches (30 cm) for inputs up to and including 100,000 Btuh (30 kW)
 3 ft (90 cm) for inputs exceeding 100,000 Btuh (30 kW)