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Innovative Hearth Products
DRT4000 Series Direct-Vent Gas Fireplaces
Table 20 - Venting Components Required for Various Exterior Wall Thicknesses, when using Typical Termination Kits
Termination Kit and 6" Vent Section (SV4.5L6)
Termination Kit and 12" Vent Section (SV4.5L12)
Termination Kit and Telescopic Section (SV4.5L12)
Horizontal Vent Figures/Tables
NOTE: Secure Vent
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.
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.
Table 22 - Top Vent—One 90° Elbow, Elbow Connection at Fireplace
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.
Vent Components Required
Termination Kit Only
rigid vent pipe and terminal are shown in the figures. Secure Flex
®
H Maximum
feet
meters
feet
3
0.91
Exterior Wall Thickness
6 to 9-1/4" (152 to 235 mm)
10-3/4 to 14" (273 to 356 mm)
16-3/4 to 20" (426 to 508 mm)
11-3/4 to 20" (299 to 508 mm)
WARNING
H = 28 in. (711 mm) Maximum
H = 21" (533 mm) maximum
28"
(711 mm) to outside
of termination
*
When using Secure Flex
wall firestop/spacer SF4.5HF.
V Minimum
meters
Elbow only
Installation
900697-01 01/2017
flexible vent pipe and
®
**When using Secure Flex, use
Wall Firestop/Spacer SF4.5HF.
, use
®
H
Wall
firestop/
spacer
SV4.5HF *
V
33
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