Installation
900994-00K, 07/2021
Innovative Hearth Products
DRL2000 & DRL3500 Series Direct-Vent Gas Fireplaces
32
Table 17 - Top Vent—Two 90° Elbows
H Maximum
V Minimum
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
25
7.62
5
1.524
Ceiling firestop/
spacer SV4.5VF *
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.
NOTE:
35” & 45” model = Strongly
recommend at least 1 ft of vertical
rise directly off top of unit.
55” = 1 ft of vertical rise is required
directly off unit.
*
**
V1
H
V
V + V
1
+ H = 60 ft (18.3 m) maximum
H = 25 ft (7.62 m) maximum
Install the U-shaped vent restrictor in any vent run with more than 6 ft of
vertical rise. See
Page 24
for more information.
If 25 ft of (H) horizontal vent run is needed, then 5 ft (straight
section) 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.
Minimum 6 ft and maximum of 60 ft of vertical venting.
Table 18 - Top Vent—Three Elbows
H + H
1
Maximum
V Minimum
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
Ceiling firestop/
spacer SV4.5VF
*
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.
NOTE:
35” & 45” model = Strongly recommend at
least 1 ft of vertical rise directly off top of unit.
55” = 1 ft of vertical rise is required directly off unit.
*
**
V1
H
V
H1
H + H1 = 20 ft (6.1 m) maximum
V + V1 + H + H1 = 60 ft (18.3 m) maximum
Install the U-shaped vent restrictor in any vent run with more than 6 ft of
vertical rise. See
Page 24
for more information.
If 20 ft of (H) horizontal vent run is needed, then 4 ft (straight
section) 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.
NOTE:
The vent system may have a maximum of three (3) 90°
elbows.
Minimum 6 ft and maximum of 60 ft of vertical venting.
f i r e - p a r t s . c o m
