Installation
900005-00, 10/2015
Innovative Hearth Products
Envy™ Direct-Vent Gas Fireplaces
28
10. Continue installation of horizontal/inclined sections
—Continue with the installation of the straight vent
sections in horizontal/inclined run. Install support straps every 5 ft. (1.52 m) along horizontal/inclined vent
runs using conventional plumber’s tape (
Figure 21
). Maintain the horizontal/inclined run in a straight (no dips),
slightly elevated plane. The recommended incline is approximately 1/4” per 1 ft (20 mm per 1 m) horizontal, in a
direction away from the fireplace. Smaller rise per foot run ratios are acceptable all the way to at or near level.
Maintain the required clearances to combustibles (
Page 23
).
11. Assemble the vent run to the exterior wall
—If not previously measured, locate the center of the vent at the
exterior wall. Prepare the opening. Assemble the vent system until the terminus of the last section is within
7” (178 mm) to 11-1/4” (286 mm) inboard of the exterior surface to which the SV4.5 HT termination is to be
attached (
Figure 22
). If the terminus of the last section is not within this distance, use the telescopic vent section
SV4.5LA, as the last vent section.
Table 17
lists the additional venting components needed (in addition to the
termination and adaptor) for a range of wall thicknesses.
Table 17 - Venting Components Required for Various Exterior Wall Thicknesses, when using Typical Termination Kits
Vent Components Required
Exterior Wall Thickness
Termination Kit Only
6 to 9-1/4” (152 to 235 mm)
Termination Kit and 6” Vent Section (SV4.5L6)
10-3/4 to 14” (273 to 356 mm)
Termination Kit and 12” Vent Section (SV4.5L12)
16-3/4 to 20” (426 to 508 mm)
Termination Kit and Telescopic Section (SV4.5L12)
11-3/4 to 20” (299 to 508 mm)
NOTE:
See
Figure 23
for wall thickness ranges when using SV4.5HT-2 termination kit.
12. Attach the termination adaptor
—Attach the adaptor (SV4.5RCH, provided with the termination) to the vent
section or telescoping vent section, elbow, or fireplace collar (
Figure 22
).
13. Install the firestop/spacer at the exterior wall
—When using the square termination, install SV4.5HF (Secure
Vent), SF4.5HF (Secure Flex) Firestop/Spacer over the opening at the exterior side of the framing, long side up,
with the 3” spacer clearance at the top (
Figure 22
) and nail into place.
NOTE:
The firestop/spacer also may be installed over the opening on the interior side of framing. The gap
between the vent pipe and a firestop can be sealed with noncombustible caulking.
14. Install the termination (
SV4.5HT-2
)
—From outside the exterior wall, slide the collars of the termination onto the
adaptor (the outer over the outer and the inner inside the inner) until the termination seats against the exterior
wall surface to which it will be attached. Orient the housing of the termination with the arrow pointed upwards.
Secure the termination to the exterior wall. The horizontal termination must not be recessed into the exterior wall
or siding by more than the 1-1/4” (32 mm) (
Figure 25
).
NOTE:
If the venting exits the building below grade, or close to grade, see
Installation Accessories on Page 44
for available snorkel terminations. The termination must be above grade and above the expected level of
snow accumulation.
NOTE:
The vent termination is hot while in operation and for a period of time following the use of the fireplace.
To prevent contact with hot surfaces, use a horizontal termination guard; available for purchase at your local
dealer.
The horizontal terminations have been designed to perform in a wide range of weather conditions. Innovative
Hearth Products terminations meet or exceed industry standards.
When selecting the location for a horizontal termination,
do not place the termination where water from eaves
and adjoining rooflines may create a heavy flow of cascading water onto the termination cap
. If the cap must
be placed where the possibility of cascading water exists, it is the responsibility of the builder to direct the water
away from the termination cap with gutters or other means.
Carefully follow the installation instructions for the termination, including the use of silicone caulking where required.
