Use & Care Manual

17
Table 2
From Sea Level through 2,000 ft. (609 m) Above Sea Level
Model
Vent &
Combustion
Air-Inlet
System
Diameter
Min. Allowed Equivalent
Vent & Combustion Air-
Inlet Lengths (Each Pipe
Run)
Max. Allowed Equivalent
Vent & Combustion Air-
Inlet Lengths (Each Pipe
Run)
Vent and Combustion
Air-Inlet System
Termination(s)Inches Feet Meters Feet Meters
50 Gallon, 65,000
& 47,000 Btu/hr.
Models
3 7 2 50 15
90° Elbows
3 7 2 40 12 Concentric*
4 7 2 100 30 90° Elbows
65 Gallon, 65,000
& 56,000 Btu/hr.
Models
3 8 2.5 50 15
90° Elbows
3 8 2.5 40 12
Concentric*
4 8 2.5 100 30
90° Elbows
75 Gallon, 75,100
& 70,000 Btu/hr.
Models
3 8 2.5 50 15 90° Elbows
3 8 2.5 40 12 Concentric*
4 8 2.5 100 30 90° Elbows
From 2,000 ft. (609 m) Above Sea Level through 5,999 ft. (1,828 m) Above Sea Level
Model
Vent &
Combustion
Air-Inlet System
Diameter
Min. Allowed Equivalent
Vent & Combustion Air-
Inlet Lengths (Each Pipe
Run)
Max. Allowed Equivalent
Vent & Combustion Air-
Inlet Lengths (Each Pipe
Run)
Vent and Combustion
Air-Inlet System
Termination(s)Inches Feet Meters Feet Meters
50 Gallon, 65,000
& 47,000 Btu/hr.
Models
3 7 2.5 50 15 90° Elbows
3 7 2.5 40 12 Concentric*
4 7 2.5 100 30 90° Elbows
65 Gallon, 65,000
& 56,000 Btu/hr.
Models
3 8 2.5 30 9 90° Elbows
3 8 2.5 20 6 Concentric*
4 8 2.5 100 30 90° Elbows
75 Gallon, 75,100
& 70,000 Btu/hr.
Models
3 8 2.5 25 8 90° Elbows
3 8 2.5 20 6 Concentric*
4 8 2.5 100 30 90° Elbows
*Use only Rheem 3 in. (7.6 cm) concentric termination.