Heat & Glo TIARA I-B Owner's Manual page 14

Step 3.
For installations using a round support box/wall thimble
(check pipe manufacturer's instructions), mark the wall for a
10 in. x 10 in. (254mm x 254mm) square hole. The center
of the square hole should line up with the center line of the
horizontal pipe, as shown in Figure 5.5. Cut and frame the
hole in the exterior wall where the vent will be terminated. If
the wall being penetrated is constructed of noncombustible
material, i.e. masonry block or concrete, a 7 in. (178mm)
diameter hole is acceptable.
CENTER
LINE
Figure 5.5
NOTE:
(1) Installation requires a minimum of 6 in. (152mm)
horizontal run of vent with a 1/4 in. (6mm) rise run towards
the termination. Each 1 ft. (305mm) of horizontal venting
must include a 1/4 in. (6mm) rise. Never allow the vent
to run downward. This could cause high temperatures
and may present the possibility of a fire.
(2) The location of the horizontal vent termination on an
exterior wall must meet all local and national building
codes, and must not be easily blocked or obstructed,
see Figure 4.4 on page 10.
(3) For installations requiring a vertical rise on the exterior
of the building, a snorkel kit is available with a 14 in.
(356mm) and a 36 in. (914mm) tall snorkel termination
cap. Follow the same installation procedures as used
for standard horizontal terminations. If the
termination must be installed below grade (i.e. basement
application), proper drainage must be provided to
prevent water from entering the snorkel termination. Do
not backfill around snorkel termination.
Step 4.
Position the horizontal termination cap in the center of the 10
in. x 10 in. (254mm x 254mm) square hole and run a bead
of non-hardening mastic around its outside edges, so as to
make a seal between it and the wall, attach termination cap
to the exterior wall with the four wood screws provided. The
arrow on the vent cap should be pointing up (Figure 5.6).
Page 14
CENTER OF
HOLE
WALL
CENTER
LINE
THIMBLE
Heat & Glo · Tiara I B & Tiara II B · 7010-149M
Figure 5.6
NOTES:
(1) The four wood screws provided should be replaced with
appropriate fasteners for stucco, brick, concrete, or
other types of sidings.
(2) A termination cap with a built-in vinyl standoff is highly
recommended on a building with vinyl siding. The pilot
hole will be 2 in. (51mm) closer to the bottom of the
square than the top. Using a framing square, draw a 14
in. x 14 in. (356mm x 356mm) square around the pilot
hole. See Figure 5.7.
Figure 5.7
(NOTE: Some termination caps may cause the vent
snorkel pipe to be off center on flashing.). Ensure that proper
clearances to combustible materials are maintained. If
you are not using an approved termination cap with a built-
in standoff on a building with vinyl siding, a vinyl siding
standoff should be installed between the termination
cap and the exterior wall (Figure 5.8, on the next page).
Follow manufacturer's instructions for attaching the
vinyl siding standoff to the horizontal termination cap.
The vinyl siding standoff prevents excessive heat from
possibly melting the vinyl siding material. The vent
terminal cap shall not be recessed into a wall or siding.
Remove siding from the area where the standoff will be
located.
HOT HOT
WALL THIMBLE
8 in.
(203mm)
7 in.
(178mm)
7 in.
(178mm) 6 in.
(152mm)
WOOD
SCREW
August 1, 2008