Fireplace Restrictors And Vent Arrangement; Restrictor Table: Series 40 (Burner 30); Restrictor Table: Series 75 (Burner 45) - ORTAL Front Facing Series Installation And Operation Manual
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Fireplace Restrictors and Vent Arrangement
The information and tables in this section will help you calculate the correct restrictor selection. The tables
below show the options permitted for both vertical and horizontal positioning of the pipe and the required
restrictor. Any venting pathway that does not appear in the tables requires approval from the
manufacturer.
The tables below apply to both Natural Gas and Propane. The tables represent manufacturer's guidelines.
Environment gas type (NG vs. LP and the source of the gas) and other factors may affect the best restrictor
choice.
NOTE: If the flame appears to be atypical, please contact ORTAL for alternate restrictor size
recommendations.
The following symbols are used in the tables:
X: The path is not allowed.
0: There is no restriction.
Numbers other than zero: The number represents the width recommended for the size of
restrictor.
NOTE: Space Creator models may require special restrictors. Traditional models do not require
restrictors.
REMINDER
Series 40-170: A minimum 3' vertical run is required before any offset.
200-250: A minimum 6' vertical run is required before any 90˚ bends.
Restrictor Table: Series 40 (Burner 30)
V
27'
1.97"
1.57"
24'
1.97"
1.57"
21'
1.97"
1.97"
18'
1.97"
1.97"
15'
1.97"
1.97"
12'
1.97"
1.97"
9'
1.97"
1.97"
6'
1.97"
1.97"
3'
1.97"
1.97"
1.5'
x
x
0'
3'
Restrictor Table: Series 75 (Burner 45)
V
27'
1.97"
1.57"
24'
1.97"
1.57"
21'
1.97"
1.97"
18'
1.97"
1.97"
15'
1.97"
1.97"
12'
1.97"
1.97"
9'
1.97"
1.97"
6'
1.97"
1.97"
3'
1.97`"
1.97"
1.5'
x
x
0'
3'
64
1.57"
1.18"
1.18"
1.57"
1.18"
1.18"
1.57"
1.57"
1.18"
1.57"
1.57"
1.18"
1.57"
1.57"
1.18"
1.57"
1.57"
1.57"
1.97"
1.57"
1.57"
1.97"
1.57"
1.57"
1.97"
1.57"
1.57"
x
x
x
6'
9'
12'
1.57"
1.18"
1.18"
1.57"
1.18"
1.18"
1.57"
1.57"
1.18"
1.57"
1.57"
1.18"
1.57"
1.57"
1.18"
1.57"
1.57"
1.57"
1.97"
1.57"
1.57"
1.97"
1.57"
1.57"
1.97"
1.57"
1.57"
x
x
x
6'
9'
12'
0
0
0
1.18"
0
0
1.18"
1.18"
0
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
x
x
x
15'
18'
21'
0
0
0
1.18"
0
0
1.18"
1.18"
0
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
1.18"
x
x
x
15'
18'
21'
Ortal Installation Manual: Built-In Models, September 2018
0
x
x
0
0
X
0
0
0
0
0
0
1.18"
0
0
1.18"
0
0
1.18"
0
0
1.18"
0
0
0
0
x
x
x
x
24'
27'
30'
0
x
x
0
0
x
0
0
0
0
0
0
1.18"
0
0
1.18"
0
0
1.18"
0
0
1.18"
0
0
0
0
x
x
x
x
24'
27'
30'
x
x
x
0
0
0
0
0
x
x
33'
H
x
x
x
0
0
0
0
0
x
x
33'
H
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