Installation
900683-01F, 10/2018
Innovative Hearth Products
DRT3500 Series Direct-Vent Gas Fireplaces
32
Firestop/Spacer (SV4.5HF) shown
on the exterior side of the wall. It
may also be installed on the
interior side.
Typical
Termination
Shown
7”
(178)
5-1/8”
(130 mm)
12-1/8”
(308 mm)
Note: Centerline of Vent Piping is
NOT the Same as the Centerline of
the Frame Opening.
6” to 48” Vent Section,
Telescopic vent section,
Elbow or Appliance Collar
Base of Appliance
3”
(77 mm)
1”
(26 mm)
Adaptor
SV4.5RCH
10-1/2”
(267 mm)
*
To help minimize water infiltration
it is recommended that the Fire-
stop/ Spacer (SV4.5HF) be installed
on the exterior side of the wall.
*Recommended IHP termination kit: H1968.
**With termination kit only, 6 to 9-1/4”
**
See Table 10, Page 18 for the minimum
distance to the base of the fireplace.
Figure 25 - Installing the Horizontal Termination
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.
Figure 26 - Venting Connection and Exterior Wall Recessing of the Horizontal Termination H1968
* Use silicone caulking to
seal the top and sides of the
termination, up to the under-
layment, stucco, or masonry
wall surface.
Adaptor
SV4.5RCH
**For thicknesses greater than
9-1/4" (235mm), see
Table 20
.
SV4.5HT-2
Square Termination
Maximum Wall Thickness
9-1/4" (235 mm)**
Exterior Surface of Siding
Exterior Surface of
Framing
6" to 9-1/4"
(152 to 235 mm)**
1-1/4" Maximum Recess of
the Square Termination into
Exterior Finishing Material
SV4.5HT-2
Square Termination
*Caulk
*Caulk
Stucco
Siding
Interior Surface of
Finished Wall
Last Vent Section. Use
Telescopic Vent Section
(SV4.5LA), If Necessary
Maximum Extent of
Vent Run Sections
Relative to Exterior
Surface of Framing
