4 Termination Locations

A. Vent Termination Minimum Clearances

WARNING

Fire Risk

Explosion Risk

Maintain vent clearance to combustibles as specified.

Do not pack air space with insulation or other materials.

Failure to keep insulation or other materials away from vent pipe may cause fire.

 

8 ft

 

 

(2.44 m)

Vertical

 

Lowest

 

wall

 

Discharge

 

Termination

Opening

 

 

 

Cap

 

 

Storm Collar

 

X

 

12

 

 

Roof

 

 

Flashing

 

Roof Pitch

 

 

is X / 12

H (min.) - Minimum height from roof to lowest discharge opening.

Roof Pitch

H (Min.) Ft.

Roof Pitch

H (Min.) Ft.

Flat to 6/12

 

1.0*

Over 11/12 to 12/12

4.0

Over 6/12 to 7/12

1.25*

Over 12/12 to 14/12

5.0

Over 7/12 to 8/12

1.5*

Over 14/12 to 16/12

6.0

Over 8/12 to 9/12

2.0*

Over 16/12 to 18/12

7.0

Over 9/12 to 10/12

2.5

Over 18/12 to 20/12

7.5

Over 10/12 to 11/12

3.25

Over 20/12 to 21/12

8.0

 

* 3 ft. minimum in snow regions

 

 

B-Vent Gas, Wood or Fuel

Oil Termination

 

 

 

8 ft

 

 

A

(2.44 m)

18 in.

 

(minimum) to

 

 

Perpendicular

(457 mm)

 

 

Wall

 

B

 

(gas only)

 

 

 

Gas

 

 

 

Termination

 

 

 

Termination Caps Staggered Height

 

A

Gas Termination

Wood or Fuel Oil Termination

 

 

B

6 in. (152 mm) min.

 

 

 

 

20 in. (508 mm) min.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B-Vent Gas, Wood or Fuel

 

 

 

 

 

 

 

 

Oil Termination

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8 ft

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(2.44 m)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(minimum) to

 

 

 

Wood or

 

 

20 in. min. *

 

 

 

Perpendicular

 

 

Gas Termination

 

 

 

(508 mm)

 

 

 

 

 

Wall

 

 

 

 

 

 

 

 

 

(gas only)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Termination Caps Same Height

*If using decorative cap cover(s), this distance may need to be increased. Refer to the installation instruc- tions supplied with the decorative cap cover.

Figure 4.2 Multiple Vertical Termination

Figure 4.1 Minimum Height from Roof to Lowest Discharge Opening

Figure 4.1 specifies minimum vent heights for various pitched roofs.

12

Heatilator • Novus BV-Mesh4031-553 Rev F • 11/07

Page 12
Image 12
Heatiator NB3933MI, NB4842M, NB4236MI Termination Locations, Vent Termination Minimum Clearances, Fire Risk Explosion Risk

NB3933M, NB3630M, NB3630MI, NB3933MI, NB4236M specifications

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