Installation
900697-01 01/2017
Innovative Hearth Products
DRT4000 Series Direct-Vent Gas Fireplaces
33
Table 20 - 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)
Horizontal Vent Figures/Tables
NOTE:
Secure Vent
®
rigid vent pipe and terminal are shown in the figures. Secure Flex
®
flexible vent pipe and
terminal may also be used.
NOTE:
Two (2) 45° elbows may be used in place of one (1) 90° elbow. The same rise to run ratios, as shown in the
venting figures for 90° elbows, must be followed if 45° elbows are used.
NOTE:
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.
NOTE:
SV4.5VF (Secure Vent), SF4.5VF (Secure Flex) firestop/spacer must be used any time vent pipe passes
through a combustible floor or ceiling. SV4.5HF (Secure Vent), SF4.5HF (Secure Flex) firestop/spacer must be used
any time vent pipe passes through a combustible wall.
WARNING
Do not join separate sections of concentric flexible vent together.
Table 21 - Rear Vent—No Elbows
See
Table 20
as an aid in venting component
selection for a particular range of exterior wall
thicknesses.
NOTE: “H” is horizontal distance from rear of unit to
outer wall surface
NOTE: When venting Rear Horizontal with slip
collar and termination only, install base vent
restrictor with the breakaway portion raised.
H = 28 in. (711 mm) Maximum
**
When using
Secure Flex
, use
Wall Firestop/Spacer
SF4.5HF
.
H = 21” (533 mm) maximum
28”
(711 mm) to outside
of termination
Table 22 - Top Vent—One 90° Elbow, Elbow Connection at Fireplace
H Maximum
V Minimum
feet
meters
feet
meters
3
0.91
Elbow only
Install the U-shaped vent restrictor in any vent run with
more than 4 ft of vertical rise. See
Page 22
for more
information.
See
Table 20
as an aid in venting component selection for a
particular range of exterior wall thicknesses.
NOTE: Only in top vent where elbow is connected at fireplace
collar is it allowed to count elbow as 1 ft. vertical (V) rise.
Wall
firestop/
spacer
SV4.5HF *
When using Secure Flex
®
, use
wall firestop/spacer SF4.5HF.
*
H
V
