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Bryan Steam, LLC
www.bryanboilers.com
Phone: 765-473-6651
783 N Chili Ave, Peru, IN 46970 [email protected]
Table 4: Vent and Combustion Air Pipe Diameters and Maximum Lengths
Free
Flex
Model
Combustion Air Length
Vent Length
Pipe Dia. In (mm) Minimum Ft. (m) Maximum ft. (m) Pipe Dia. In (mm) Minimum Ft. (m) Maximum ft. (m)
1000
6 (160)
0
100 (45.7)
6 (160)
3 (0.9)
100 (45.7)
8 (200)
0
100 (45.7)
8 (200)
3 (0.9)
100 (45.7)
1250
6 (160)
0
100 (45.7)
6 (160)
3 (0.9)
100 (45.7)
8 (200)
0
100 (45.7)
8 (200)
3 (0.9)
100 (45.7)
1500
6 (160)
0
100 (45.7)
6 (160)
3 (0.9)
100 (45.7)
8 (200)
0
100 (45.7)
8 (200)
3 (0.9)
100 (45.7)
2000
8 (200)
0
100 (45.7)
8 (200)
3 (0.9)
100 (45.7)
2500
10 (250)
0
100 (45.7)
10 (250)
3 (0.9)
100 (45.7)
3000
10 (250)
0
100 (45.7)
10 (250)
3 (0.9)
100 (45.7)
3500
12 (315)
0
100 (45.7)
12 (315)
3 (0.9)
100 (45.7)
4000
12 (315)
0
100 (45.7)
12 (315)
3 (0.9)
100 (45.7)
4500
14 (356)
0
100 (45.7)
14 (356)
3 (0.9)
100 (45.7)
5000
14 (356)
0
100 (45.7)
14 (356)
3 (0.9)
100 (45.7)
5500
14 (356)
0
100 (45.7)
14 (356)
3 (0.9)
100 (45.7)
6000
14 (356)
0
100 (45.7)
14 (356)
3 (0.9)
100 (45.7)
Note:
Contact factory for assistance on maximum vent length applications.
This table applies to all listed vent/combustion air system opetoins.
Table 5: Vent and Combustion Air Equivalent Length Calculation Worksheet
Component
Combustion Air
Vent
Equivalent
Length Per
Piece
X
Quantity
=
Subtotal
Equivalent
Length
Equivalent
Length Per
Piece
X
Quantity
=
Subtotal
Equivalent
Length
Straight Pipe
X
=
A
=
D
90° Elbow
X
=
B
=
E
45° Elbow
X
=
C
=
F
Combustion Air Total
Equivalent Length
=
Vent Total Equivalent Length
=
Notes:
1. Total equivalent length cannot exceed maximum 100 equivalent feet (30.48 Meters) in length.
2. Combustion air and vent terminations do not cound towards total equivalent length.