Submittal
DRAFT
Water Flow
Requirements
Vent
Information
Venting
Information
inches cm inches cm ft* m inches cm ft* m inches cm
1000 6 15 6 15 100 30.5 6 15 100 30.5 12 30
1500 8 20 8 20 100 30.5 8 20 100 30.5 14 36
2000 8 20 8 20 100 30.5 8 20 100 30.5 18 46
3000 10 25 10 25 100 30.5 10 25 100 30.5 22 56
*Equivalent Feet: Equivalent Feet: To calculate maximum equivalent length, measure the linear feet of the pipe
and add 5 feet (1.5m) for each elbow used.
***Category II: Category II pipe size may vary. Draft must remain between -0.1 and -0.001" w.c..
Notes:
1. Installations in the U.S. require exhaust vent pipe that is CPVC complying with ANSI/ASTM D1785 F441,
stainless steel complying with UL1738, or polypropylene complying with ULC S636.
2. Installations in Canada require exhaust vent pipe that is certified to ULC S636.
3. Intake (air) pipe must be PVC or CPVC that complies with ANSI/ASTM D1785 F441, ABS that complies with
ANSI/ASTM D1527, stainless steel, or galvanized material.
Maximum
Ducted Air Pipe
Length
Air Pipe Size
Typical
Category II Vent
Pipe Size***
Maximum
Category IV
Vent Pipe
Length
Category IV
Vent Pipe Size
Vent / Air
Connector Size
Model
Venting
Information
inches cm inches cm ft* m inches cm ft* m inches cm
1000 6 15 6 15 100 30.5 6 15 100 30.5 12 30
1500 8 20 8 20 100 30.5 8 20 100 30.5 14 36
2000 8 20 8 20 100 30.5 8 20 100 30.5 18 46
3000 10 25 10 25 100 30.5 10 25 100 30.5 22 56
*Equivalent Feet: Equivalent Feet: To calculate maximum equivalent length, measure the linear feet of the pipe
and add 5 feet (1.5m) for each elbow used.
***Category II: Category II pipe size may vary. Draft must remain between -0.1 and -0.001" w.c..
Notes:
1. Installations in the U.S. require exhaust vent pipe that is CPVC complying with ANSI/ASTM D1785 F441,
stainless steel complying with UL1738, or polypropylene complying with ULC S636.
2. Installations in Canada require exhaust vent pipe that is certified to ULC S636.
3. Intake (air) pipe must be PVC or CPVC that complies with ANSI/ASTM D1785 F441, ABS that complies with
ANSI/ASTM D1527, stainless steel, or galvanized material.
Maximum
Ducted Air Pipe
Length
Air Pipe Size
Typical
Category II Vent
Pipe Size***
Maximum
Category IV
Vent Pipe
Length
Category IV
Vent Pipe Size
Vent / Air
Connector Size
Model
Water Flow
Requirements
Flow HL* Flow HL* Flow HL* Flow HL* Flow HL* Flow HL*
gpm ft gpm ft gpm ft gpm ft gpm ft gpm ft
1000 95 1.9 63 1.1 48 0.7 38 0.5 32 0.4 27 0.3
1500 142 3.4 95 1.6 71 1.0 57 0.6 48 0.5 41 0.3
2000 190 4.5 127 2.1 95 1.2 76 0.8 63 0.6 54 0.4
3000 285 7.0 190 3.5 142 2.1 114 1.4 95 1.0 81 0.8
*Headloss is for boiler only (no piping).
Model
Flow HL* Flow HL* Flow HL* Flow HL* Flow HL* Flow HL*
l/m (m) l/m (m) l/m (m) l/m (m) l/m (m) l/m (m)
1000 360 0.6 239 0.3 182 0.2 144 0.2 121 0.1 102 0.1
1500 538 1.0 360 0.5 269 0.3 216 0.2 182 0.2 155 0.1
2000 719 1.4 481 0.6 360 0.4 288 0.2 239 0.2 204 0.1
3000 1079 2.1 719 1.1 538 0.6 432 0.4 360 0.3 307 0.2
*Headloss is for boiler only (no piping).
70°F
11°C 17°C 22°C 28°C 33°C 39°C
Temperature Rise
60°F
Temperature Rise
Model
20°F 30°F 40°F 50°F