Installation
900004-00, 03/2018
Innovative Hearth Products
DRT2000 and DRC2000 Direct-Vent Fireplaces
30
9. Change vent direction—At transition from or to a horizontal/inclined run, install SV4.5E45 or SV4.5E90 elbows
in the same manner as the straight vent sections. The elbows feature a twist section to allow them to be routed
about the center axis of their initial collar section to align with the required direction of the next vent run element.
Twist elbow sections in a clockwise direction only so as to avoid the possiblity of unlocking any of the previously
connected vent sections (Figure 18).
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 26). 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.
Use a carpenter’s level to measure from a constant surface and adjust the support straps as necessary.
Maintain the required clearances to combustibles (Page 24).
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 27). 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 21 lists the additional venting components needed (in addition to the
termination and adaptor) for a range of wall thicknesses.
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 27).
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 4” spacer clearance at the top (Figure 27) and nail into place.
NOTE: The firestop/spacer may also be installed over the opening at the interior side of the framing.
14. Install the termination (SV4.5HT-2, SV4.5HTSS, or SV4.5HTKCT)—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 28).
NOTE: Termination SV45HTKCT (and other compact terminations) should not be used with a straight,
horizontally vented rear termination in the 45” units. A minimum 12” rise is required when venting the 45” units.
NOTE: If the venting exits the building below grade, or close to grade, see Installation Accessories on
Pages
45 and 46
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. Our
terminations meet or exceed industry standards.
When selecting the locations of your horizontal terminations, 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 by using gutters or other means.
Take care to carefully follow the installation instructions for the termination, including the use of silicone caulking
where required.
