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Innovative Hearth Products
DRT35ST and DRT35PF Direct-Vent Gas Fireplaces
VERTICAL TERMINATION SYSTEMS (ROOF)
See Figure 18 and Figures 28 through 33 on
Pages 21, 22 and 23 and their associated
Vertical Vent Tables which illustrate the various
vertical venting configurations that are possible
for use with these appliances. Secure Vent
pipe applications are shown in these Figures;
Secure Flex
pipe may also be used. A Vertical
®
Vent Table summarizes each system's minimum
and maximum vertical and horizontal length
values that can be used to design and install the
vent components in a variety of applications.
Both these vertical vent systems terminate
through the roof. The minimum vent height
above the roof and/or adjacent walls is speci-
fied in ANSI Z223.1-(latest edition) (In Canada,
the current CAN/CGA-B149.1 installation code)
by major building codes. Always consult your
local codes for specific requirements. A general
guide to follow is the Gas Vent Rule (refer to
Figure 4 on Page 9).
Vertical (Straight) Installation
(Figure 18)
Determine the number of straight vent sec-
tions required. 4-1/2" (114 mm), 10-1/2" (267
mm), 22-1/2" (572 mm), 34-1/2" (876 mm)
and 46-1/2" (1181 mm) net section lengths
are available (see Tables on this page and
Page 39 - Rigid Vent Sections). Plan the vent
lengths so that a joint does not occur at the
intersection of ceiling or roof joists. Refer to
the Vent Section Length Chart.
Figure 18
18
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NOTE: Convert inches into metric equivalent
measurement, as follows:
Millimeters (mm) = Inches x 25.4
Centimeters (cm) = Inches x 2.54
Meters (M) = Inches x .0254
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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Table 7
Installation and Operation Instructions
900300-00, 01/2019
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Effective Vent Length
Model
Effective Length
SV4.5L6
4-1/2"
SV4.5L12
10-1/2"
SV4.5L24
22-1/2"
SV4.5L36
34-1/2"
SV4.5L48
46-1/2"
T
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