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Innovative Hearth Products
DRC3000-B Series Direct-Vent Gas Fireplaces
6. Install the firestop/spacer at the ceiling. When using Secure Vent
using Secure Flex
be installed on the bottom side of the ceiling. If attic space is above the ceiling, the firestop/spacer must be installed
on the top side of the joist. Route the vent sections through the framed opening and secure the firestop/spacer with 8d
nails or other appropriate fasteners at each corner.
Maintain 1" (26 mm) clearance to combustibles, framing members, and attic or ceiling insulation when running vertical
chimney sections.
7. Support the vertical run sections. On the vertical run, support the venting system every 8 ft (2.4 m) above the
fireplace vent outlet with field provided support straps (Plumber's tape). Attach the straps to the vent pipe and
secure to the framing members with nails or screws (Figure 19, Page 26). 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 possibility of unlocking any of the previously connected vent sections
(Figure 16, Page 23).
9. 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 23, Page 30). 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 25).
10. 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 SV4.5HT termination is to be attached (Figure
24, Page 32). 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 20, Page 33 lists the additional venting components needed (in addition
to the termination and adaptor) for a range of wall thicknesses.
11. 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 24, Page 32).
12. Install the firestop/spacer at the exterior wall. When using the square termination, install SV4.5HF (Secure
Vent
with the 3" spacer clearance at the top (Figure 24, Page 32) and nail into place.
NOTE: The firestop/spacer may also be installed over the opening at the interior side of the framing.
13. Install the termination. From outside the exterior wall, slide the collars of the termination onto the adaptor
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,
Page 32).
NOTE: If the venting exits the building below grade, or close to grade, see Installation Accessories on Page
55 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.
NOTE: To help minimize water infiltration install the firestop/spacer (SV4.5HF) on the exterior side of the wall.
The firestop may be caulked with mill base caulk (such as 10K81) or high-temperature silicone.
, use SF4.5VF firestop/spacer. If there is living space above the ceiling level, the firestop/ spacer must
®
), SF4.5HF (Secure Flex
) Firestop/Spacer over the opening at the exterior side of the framing, long side up,
®
®
, use SV4.5VF firestop/spacer at ceiling joists; when
®
Installation
901191-00C, 07/2023
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