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Innovative Hearth Products
DRT4000 Series Direct-Vent Gas Fireplaces
Table 23 - Top Vent—One 90° Elbow, Elbow Connection NOT at Fireplace
H Maximum
feet
5
10
15
25
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.
If 25 ft of (H) horizontal vent run is needed, then 5 ft minimum of (V) vertical vent will be
required.
This table shows a 1 (V) to 5 (H) ratio. For every 1 ft of (V) vertical, you are allowed 5 ft of (H)
horizontal run, up to a maximum horizontal run of 25 ft (7.62 m).
Table 24 - Rear Vent—Two 90° Elbows
H + H
Maximum
1
feet
meters
5
1.524
10
3.048
15
4.572
25
7.62
V + H + H
= 60 ft (18.288 m) maximum
1
H = 8 ft (2.438 m) maximum
H + H
= 25 ft (7.62 m) maximum
1
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.
If 25 ft of (H) horizontal vent run is needed, then 5 ft minimum of (V) vertical vent will be required.
This table shows a 1 (V) to 5 (H) ratio. For every 1 ft of (V) vertical, you are allowed 5 ft of (H)
horizontal run, up to a maximum horizontal run of 25 ft (7.62 m).
Table 25 - Top Vent—Two 90° Elbows
H + H
feet
3
5
10
15
25
V + H + H
= 60 ft (18.288 m) maximum
1
H + H
= 25 ft (7.62 m) maximum
1
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.
If 25 ft of (H) horizontal vent run is needed, then 5 ft minimum of (V) vertical vent will be required.
This table shows a 1 (V) to 5 (H) ratio. For every 1 ft of (V) vertical, you are allowed 5 ft of (H) horizontal run, up to a
maximum horizontal run of 25 ft (7.62 m).
34
V Minimum
meters
feet
meters
1.524
1
3.048
2
4.572
3
7.62
5
H Maximum
feet
meters
feet
2
0.610
4
1.219
6
1.829
10
3.048
Maximum
V Minimum
1
meters
feet
0.91
Elbow only
1.524
1
3.048
2
4.572
3
7.62
5
0.305
0.610
0.914
1.524
Wall firestop/spacer SV4.5HF **
V Minimum
meters
1
0.305
2
0.610
3
0.914
5
1.524
spacer SV4.5HF **
meters
0.305
H1
0.610
0.914
When using Secure
*
Note - When using
Flex
, use ceiling
Secure Flex
®
Firestop/Spacer SF4.5VF.
1.524
firestop/spacer
SF4.5VF.
When using Secure Flex,
**
When using Secure
use Firestop/Spacer
Flex, use wall
SF4.5HF.
firestop/spacer
SF4.5HF.
H
H
Min. One
Foot Vent
Section
Required
SV4.5VF *
Wall Firestop/Spacer
*
When using Secure Flex
, use
®
(SV4.5HF)
ceiling firestop/spacer SF4.5VF.
**
When using Secure Flex, use wall
Firestop/Spacer
firestop/spacer SF4.5HF.
(SV4.5VF)
H1
H 1
Wall firestop/
Wall Firestop/
Spacer
SV4.5HF**
V
V
*
When using Secure Flex
ceiling firestop/spacer SF4.5VF.
**
When using Secure Flex, use
**When using Secure Flex, use
wall firestop/spacer SF4.5HF.
Wall firestop/spacer
Wall Firestop/Spacer
SV4.5HF **
(SV4.5HF)
H 1
Wall firestop/spacer
Wall
Firestop/Spacer
SV4.5HF **
, use
TM
(SV4.5HF)
Ceiling firestop/
Ceiling
spacer SV4.5VF *
Firestop/Spacer
(SV4.5VF)
Min. One Foot Vent
Section Required
Installation
900697-01 01/2017
V
V
Ceiling
firestop/
spacer
Ceiling
H
H
Ceiling
firestop/
Ceiling
spacer
Firestop/Spacer
SV4.5VF *
SV4.5VF*
*When using Secure Flex , use
, use
®
®
Ceiling Firestop/Spacer SF4.5VF.
Wall Firestop/Spacer SF4.5HF.
H
H
V
V
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