Table of Contents
Advertisement
Innovative Hearth Products
DRT3500-C Series Direct-Vent Gas Fireplaces
Table 20 - Venting Components Required for Various Exterior Wall Thicknesses, when using Typical Termination Kits
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: Use the minimal horizontal vent restrictor when rear
venting with only a slip collar and a termination.
NOTE: If SV4.5HTSS termination is used (for 35" models
only); the Wall Heatshield provided shall be installed per
instructions on Page 32 (see instruction #12 and Figure 25A).
Table 22 - Top Vent—One 90° Elbow, Elbow Connection at Fireplace
34
Vent Components Required
Termination Kit Only
Termination Kit and 6" Vent Section (SV4.5L6)
Termination Kit and 12" Vent Section (SV4.5L12)
Termination Kit and Telescopic Section (SV4.5LA)
and 6" vent section (SV4.5L6)
rigid vent pipe and terminal are shown in the figures. Secure Flex
®
H Maximum
feet
meters
3
0.91
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.
NOTE: If SV4.5HTSS termination is used (for 35" models only);
the Wall Heatshield provided shall be installed per instructions on
Page 32 (see instruction #12 and Figure 25A).
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
27-1/2"
(699 mm) to outside
of termination
*
V Minimum
feet
meters
Elbow only
NOTE: If SV4.5HTSS termination
is used (for 35" models only); the
Wall Heatshield provided shall be
installed per instructions on Page 32
(see instruction #12 and Figure 25A).
flexible vent pipe and
®
H = 21" (533 mm) maximum
H
When using Secure Flex
**When using Secure Flex, use
wall firestop/spacer SF4.5HF, and
Wall Firestop/Spacer SF4.5HF.
install venting with a minimum of
12" rise. (Page 50).
When using Secure Flex
, use
®
wall firestop/spacer SF4.5HF.
H
Wall
firestop/
spacer
SV4.5HF *
Installation
900960-00D, 04/2020
, use
®
V
Advertisement
Table of Contents
