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4 / 10

Page __________

of

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Venting Requirements

Model VR

  • Compliance with National and Local Codes

  • 4”Vent Pipe (24-gauge single-wall galvanized metal)

  • Terminal Vent Cap - use Reznor vent cap or equivalent

  • Vent Length - see table below

mm

Minimum

Feet

Meters

Maximum

Feet

Meters

90° Elbow

Feet

Meters

45° Elbow

Feet

Meters

Dual Vent

Feet

Adapter*

Meters

Model No. Length

Vent Diameter

Vent Length

Equivalent Length for

Feet 20 Meters 6.1 in.

25 7.6

4

4

4

4

102

102

102

102

5

5

5

5.0

1.5

1.5

1.5

1.5

45

35

20

45

35

20

13.7

10.7

6.1

13.7

10.7

6.1

6

5

3

6

5

3

1.8

1.5

0.9

1.8

1.5

0.9

3.0

2.5

1.5

3.0

2.5

1.5

0.9

0.8

0.5

0.9

0.8

0.5

6

5

3

6

5

3

1.8

1.5

0.9

1.8

1.5

0.9

50 30 9.1

SINGLE WALL METAL VENT PIPE

20 6.1 3 0.9 1.5 0.5 3 0.9

60 18.3 12 3.7 6 1.8 12 3.7

35 40 20 10.7 12.2 6.1

25

30

35 40 30

35 40 45 50 30

35 40 45 50 55 60

7.6

9.1

10.7 12.2 9.1

10.7 12.2 13.7 15.2 9.1

10.7 12.2 13.7 15.2 16.8 18.3

75

100

125

4 102

4 102

4 102

5 1.5 60 18.3 12 3.7 6.0 1.8 12 3.7

5 1.5 60 18.3 12 3.7 6.0 1.8 12 3.7

5 1.5 60 18.3 12 3.7 6.0 1.8 12 3.7

mm

Minimum

Feet

Meters

Maximum

Feet

Meters

90° Elbow

Feet

Meters

45° Elbow

Feet

Meters

Dual Vent

Feet

Adapter*

Meters

Model No. Length

150 175 200 Feet 40 45 50 55 60 40 45 50 55 60 65 70 50 55 60 65 70 Meters 12.2 13.7 15.2 16.8 18.3 12.2 13.7 15.2 16.8 18.3 19.8 21.3 15.2 16.8 18.3 19.8 21.3

Vent Diameter

Vent Length

Equivalent Length for

in.

  • Vent Terminal Direction - Horizontal or Vertical

  • Dual Venting - with Optional Dual Vent Kit only**

  • Unvented - Approved for Unvented Operation

Factors to Consider for Unvented Operation

  • Check local codes

  • Fresh Air Requirements - Natural gas, 4 CFM/1000 BTUH; Propane gas, 5 CFM/1000 BTUH

  • Unvented operation may cause excessive condensation inside the building

  • Do not operate unvented in dusty or dirty atmosphere

  • Do not operate unvented in a building where contaminants in the air will produce a toxic gas when burned or exposed to high temperature

  • Do not operate unvented with outside combustion air

**Technical data for these options is found elsewhere in this catalog.

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