Installation
900079-00, 02/2014
Innovative Hearth Products
Astria™ Sirius Linear Direct-Vent Gas Fireplaces
27
Table 19: Top Vent—Two 90° Elbows
Table 20: Top Vent—Three Elbows
H
V
V1
Y
Z
Vertical Firestop/
Spacer
X
Horizontal
Firestop/
Spacer
X
V
H1
H
V1
Y
Z
Vertical Firestop/
Spacer
X
Horizontal Firestop/
Spacer
X
Maximum total H
Minimum total V
Maximum total H
Minimum total V
feet
meters
feet
meters
feet
meters
feet
meters
5
1.524
3.3
1.006
5
1.524
3.3
1.006
10
3.1
6.5
1.981
10
3.1
6.5
1.981
15
4.65
10
3.048
15
4.65
10
3.048
20
6.096
13.5
4.115
20
6.096
13.5
4.115
Total H = Max. 20 ft (6.096 m)
Total H + Total V = Max. 60 ft (18.3 m)
Install the U-shaped vent restrictor in any vent run with more than 6 ft of vertical
rise. See Page 20 for more information.
A 20-ft total Horizontal vent run requires min. 13.5 ft total
vertical venting.
X
Vertical firestop/spacer must be used anywhere vent pipe
passes through a combustible floor or ceiling. Horizontal firestop/
spacer must be used anywhere vent pipe passes through a
combustible wall.
Y
Install the provided vent restrictor, if required.
Z
A 90° elbow may NOT be attached directly to the appliance
collar. A minimum of 6” pipe must be used between the fireplace
collar and a 90° elbow.
Total H = Max. 20 ft (6.096 m)
Total H + Total V = Max. 60 ft (18.3 m)
Install the U-shaped vent restrictor in any vent run with more than 6 ft of
vertical rise. See Page 20 for more information.
A 20-ft total Horizontal vent run requires min. 13.5 ft total
vertical venting.
X
Vertical firestop/spacer must be used anywhere vent
pipe passes through a combustible floor or ceiling. Horizontal
firestop/spacer must be used anywhere vent pipe passes through
a combustible wall.
Y
Install the provided vent restrictor, if required.
Z
A 90° elbow may NOT be attached directly to the appliance
collar. A minimum of 6” pipe must be used between the fireplace
collar and a 90° elbow.
