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Innovative Hearth Products
DRT40 Multi-View Series Direct-Vent Gas Fireplace
HORIZONTAL VENT FIGURES/TABLES (continued)
Square termination
(SV4.5HT-2) shown
Figure 44 - Side Vent, TWO 90 DEGREE ELBOWS
H
1
Square termination
(SV4.5HT-2) shown
Example: If 20 feet of (H + H
is needed, then 4 feet minimum of (V) vertical vent
will be required.
This table shows a 1(V) to 5(H) ratio. For every 1
foot of (V) vertical, you are allowed 5 feet of (H+
H
) horizontal run, up to a maximum horizontal
1
run of 20 feet.
An elbow is acceptable as 1 foot of vertical rise except
where an elbow is the only vertical component in
the system. See Figure 43.
Figure 45 - Top Vent, TWO 90 DEGREE ELBOWS
26
H 1
V
v
Wall Firestop/
Spacer (SV4.5HF)
v
Spacer (SV4.5HF)
) horizontal vent run
1
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
H
+H
H
feet
5
10
15
v
Wall Firestop/
Spacer (SV4.5HF)
20
u
Ceiling Firestop
/ Spacer (SV4.5VF)
H
Wall Firestop/
u
Ceiling Firestop
/ Spacer (SV4.5VF)
Installation and Operation Instructions
Table G
Maximum
H Maximum
1
(meter)
feet
(meter)
(1.524)
2
(0.610)
(3.048)
4
(1.219)
(4.572)
6
(1.829)
(6.096)
8
(2.438)
V + H + H 1 = 40 feet (12.2 m) Max
H = 8 feet (2.438 meters) Max.
H + H 1 = 20 feet (6.096 meters) Max.
u
When using Secure Flex
Spacer SF4.5VF
When using Secure Flex, use Firestop /
v
Spacer SF4.5HF
Example: If 20 feet of (H + H
run is needed, then 4 feet minimum of (V) vertical
vent will be required.
This table shows a 1(V) to 5(H) ratio. For every 1
foot of (V) vertical, you are allowed 5 feet of (H+
H
) horizontal run, up to a maximum horizontal
1
run of 20 feet.
See Table 8 on Page 25 as an aid in venting
component selection for a particular range of
exterior wall thicknesses.
Table H
H
Maximum
+ H
1
feet
(meter)
3
(0.914)
5
(1.524)
10
(3.048)
V
15
(4.572)
20
(6.096)
V +
H
+ H
= 40 feet (12.2 m) Max.
1
H
+ H
= 20 ft. (6.096 m) Max.
1
u
When using Secure Flex, use Firestop
/ Spacer SF4.5VF
When using Secure Flex, use Firestop
v
/ Spacer SF4.5HF
See Table 8 on Page 25 as an aid
in venting component selection for
a particular range of exterior wall
thicknesses.
900299-00, 02/2019
V Minimum
feet
(meter)
1
(0.305)
2
(0.610)
3
(0.914)
4
(1.219)
, use Firestop /
®
) horizontal vent
1
V Minimum
feet
(meter)
Elbow Only
1
(0.305)
2
(0.610)
3
(0.914)
4
(1.219)
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