Installation
900285-00 12/2016
Innovative Hearth Products
DRT3000 and DRC3000 Series Direct-Vent Gas Fireplaces
30
Install the Horizontal Termination Vent System
These instructions should be used as a guideline and do not supersede local codes in any way. Install venting
according to local codes, these instructions, the current National Fuel Gas Code (ANSI-Z223.1) in the USA or the
current standards of CAN/CGA-B149.1 in Canada.
Ensure clearances are in accordance with local installation codes and the requirements of the gas supplier.
Dégagement conforme aux codes d’installa tion locaux et aux exigences du foumisseunde gaz.
Horizontal vent systems terminate through an outside wall. Building Codes limit or prohibit terminating in specific
areas (Table 7).
The following figures and their associated horizontal vent tables illustrate the various configurations that are possible
for use with these fireplaces. Secure Vent
®
pipe is shown in these figures; Secure Flex
®
pipe may also be used. A
table summarizes each configuration’s minimum and maximum vertical and horizontal length parameters for a variety
of applications. For more information on connecting the vent pipe, see Page 23.
Figure 25 - Typical Horizontal Vent Installation
Support bracket spacing
every 5 ft (1.52 m)
Firestop/Spacer
Vertical Vent
Fireplace
Vertical
Rise
Ceiling
SV4.5E90
Elbow
Support
Brackets
Building
Support
Framing
Horizontal / Inclined Run
Termination
Termination
Exterior
Wall
SV4.5L6/12/24/36/48
Vent Sections
1. Analyze the vent route and determine the number of vent sections and elbows required—See Effective Vent
Length on Page 24 for more information. Plan the venting so that a joint does not occur in the ceiling or roof
joists. Allow for elbows (Figure 18). Maintain the minimum clearances for combustibles (Page 14).
2. Frame the exterior wall opening—Locate the center of the vent outlet on the exterior wall (Table 10). Cut and/
or frame an opening, 10-1/2 x 12-1/8” (267 x 308 mm) inside dimensions, about this center.
3. Frame the ceiling opening—If the vertical route is to penetrate a ceiling, use plumb line to locate the center
above the fireplace. Cut and/or frame an opening, 10-1/2 x 10-1/2” (267 x 267 mm) inside dimensions, about
this center (Figure 20).
4. Attach the vent components to the fireplace—See Connecting the vent pipe on Page 23.
5. Attach the vent components to each other—See Connecting the vent pipe on Page 23.
6. Install the firestop/spacer at the ceiling—When using Secure Vent
®
, use SV4.5VF firestop/spacer at ceiling
joists; when using Secure Flex
®
, use SF4.5VF firestop/spacer. If there is living space above the ceiling level,
the firestop/ spacer must 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 21).
8. 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 18).
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 25). Maintain the horizontal/inclined run in a straight (no dips),
