21
P40-R I&O Manual
IM120801
RD: AUG 2013
RL: 1D
H
ORIZONTAL
VENT
THROUGH
A
SIDE
WALL
: (
Vertical vent through roof is on page 23)
Refer to General Venting Requirements on page 19
Minimum length of a horizontal side-wall vent:
Regardless if a 90° elbow is installed, a Minimum linear 36 inch (3 ft; 91 cm) single
wall ‘C’ vent
plus
minimum 12 inch (30.5 cm) double wall ‘B’ vent through wall
Total minimum linear vent length of 48 inches (4 ft; 122 cm)
Maximum length of a horizontal side-wall vent:
Total Maximum vent length is 15 ft (4.6 m)
Each 90° or 45° elbow is equivalent to 5 ft
A minimum 12 inch (30.5 cm) double wall ‘B’ vent must be used through the wall
The flue vent system must slope downwards approximately 1/4" per foot (63 mm / 300 mm)
toward the vent terminal, from the termination of the tube - radiant tube must be level.
A maximum of two elbows (90° or 45°; each = equivalent 5 ft) can be installed in a horizon-
tal vent
For side wall venting use either Schwank/InfraSave 4”
(10 cm)
horizontal vent terminal (Part
Number: JA-0528-XX - available as an option) or an approved 4”
(10 cm)
“High Wind” vent
termination cap (see clearance information previous page and next page)
Install the termination cap a minimum of 6 inches (15 cm) from the outside wall to the inside
edge of terminal opening to minimize back pressure caused by turbulent wind conditions
(See Fig. 9 above). This also ensures flue gases are directed away from the structure to
help protect building materials from degradation by the exhausted flue gases.
The vent must be installed to prevent blockage by snow, undue wind pressure on the termi-
nation, and to protect building materials from degradation by flue gases.
Clearances Required for Horizontal Side Wall Vent :
Refer to Figure 9 above, and in particular to Figure 11 and Table 3 next page for specific
requirements of codes in the USA and Canada
Any values not listed in Table 3 shall be in accordance with local installation codes and the
requirements of the gas supplier
Footnotes for Table 3 (next page)
1
Installations in Canada in accordance with current CSA B149.1, Natural Gas and Propane
installation Code
2
Installations in the USA in accordance with the current ANSI Z223.1 / NFPA 54, National
Fuel Gas Code
†
A vent shall not terminate directly above a sidewalk or paved driveway that is located be-
tween two single family dwellings and serves both dwellings
‡
Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides
beneath the floor
**
Clearance in accordance with local installation codes and the requirements of the gas sup-
plier
.
