Superior DRT3033 - Page 34

Installation
900285-00 11/2014
Innovative Hearth Products
Superior
TM
DRT3000 Series Direct-Vent Gas Fireplaces
34
Table 26: Rear Vent—Three 90° Elbows
H + H
1
+ H
2
Maximum H Maximum V Minimum
V
*When using Secure Flex , use
Ceiling Firestop/Spacer SF4.5VF.
**When using Secure Flex, use
Wall Firestop/Spacer SF4.5HF.
Wall Firestop/Spacer
SV4.5HF**
®
Ceiling
Firestop/Spacer
SV4.5VF*
H
1
H
H
2
When using
Secure Flex
®
, use
ceiling firestop/spacer
SF4.5VF.
When using Secure
Flex, use wall firestop/
spacer SF4.5HF.
*
**
Wall firestop/spacer
SV4.5HF **
Ceiling
firestop/spacer
SV4.5VF *
H
V
H1
H2
feet meters feet meters feet meters
5 1.524 2 0.610 1 0.305
10 3.048 4 1.219 2 0.610
15 4.572 6 1.829 3 0.914
20 6.096 8 2.438 4 1.219
V + H + H
1
+ H
2
= 60 ft (18.288 m) maximum
H = 8 ft (2.438 m) maximum
H + H
1
+ H
2
= 25 ft (7.62 m) maximum
Install the U-shaped vent restrictor in any vent run with more than 4 ft of
vertical rise. See Page 21 for more information.
See Table 21 as an aid in venting component selection for a particular range of
exterior wall thicknesses.
If 20 ft of (H) horizontal vent run is needed, then 4 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 20 ft (6.096 m).
Table 27: Top Vent—Three 90° Elbows
H Maximum V Minimum
*When using Secure Flex, use
Ceiling Firestop/Spacer SF4.5VF.
**When using Secure Flex, use
Wall Firestop/Spacer SF4.5HF.
Ceiling
Firestop/Spacer
SV4.5VF*
Wall Firestop/Spacer
SV4.5HF**
V
H
V
1
Wall Firestop/Spacer
SV4.5HF**
1
H
Wall firestop/spacer
SV4.5HF **
When using Secure Flex
®
, use
ceiling firestop/spacer SF4.5VF.
When using Secure Flex, use wall
firestop/spacer SF4.5HF.
*
**
Wall firestop/spacer
SV4.5HF **
Ceiling
firestop/spacer
SV4.5VF *
H
V
H1
V1
feet meters feet meters
5 1.524 Elbow only
5 1.524 1 0.305
10 3.048 2 0.610
15 4.572 3 0.914
20 6.096 4 1.219
H + H
1
= 25 ft (7.62 m) maximum
V + V
1
+ H + H
1
= 60 ft (18.288 m) maximum
Install the U-shaped vent restrictor in any vent run with more than 4 ft of
vertical rise. See Page 21 for more information.
See Table 21 as an aid in venting component selection for a particular range of
exterior wall thicknesses.
If 20 ft of (H) horizontal vent run is needed, then 4 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 20 ft (6.096 m).