Schwank ultraSchwank EIH - Manual (Page 24)

24
UHE-F / EIH-F I&O Manual
IM100205
RD: MAY 2014
RL: 06A
 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 termination cap a minimum of 18 inches (45 cm) from the outside wall to the inside
edge of terminal opening to alleviate back pressure caused by turbulent wind conditions
(See Fig. 16). Ensure flue gases are directed away from the structure to protect building
materials from degradation by the exhausted flue gases
 At most two 90° elbows can be installed in a horizontal vent , and 3 in a vertical vent
 Each 90° elbow is equivalent to 5 ft of system length
 Installation of the vent must prevent blockage by snow and protect building materials from
degradation by flue gases
A 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.
 Will terminate 3 ft (90 cm) or more below or extend beyond a combustible soffit or over-
hang.
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)