I.Heat Shield Requirements for Horizontal Termination

WARNING! Risk of Fire! To prevent overheating and fire, heat shields must extend through the entire wall thick- ness.

DO NOT remove the heat shields attached to the wall shield firestop and the horizontal termination cap (shown in Figure 10.18).

Heat shields must overlap 1-1/2 in. (38 mm) mini- mum.

J. Install Metal Roof Flashing

See minimum vent heights for various pitched roofs (Figure 10.19) to determine the length of pipe to extend through the roof.

Slide the roof flashing over the pipe sections extending through the roof as shown in Figure 10.20.

HORIZONTAL

OVERHANG

There are two sections of the heat shield. One section is factory-attached to the wall shield firestop. The other section is factory-attached to the cap. See Figure 10.18.

If the wall thickness does not allow the required 1-1/2 in. (38 mm) heat shield overlap when installed, an extended heat shield must be used.

• If the wall thickness is less than 4-3/8 in. (111 mm), the

24 in MIN.

20 in MIN.

(510 mm MIN.)

(610 mm MIN.)

 

LOWEST

DISCHARGE

OPENING

TERMINATION CAP

VERTICAL

WALL

 

heat shields on the cap and wall shield firestop must be

 

trimmed. A minimum 1-1/2 in. (38 mm) overlap MUST

 

be maintained.

• Use an extended heat shield if the finished wall

 

thickness is greater than 7-1/4 in. (184 mm).

The extended heat shield may need to be cut to length

 

maintaining sufficient length for a 1-1/2 in. (38 mm)

 

overlap between heat shields.

Attach the extended heat shield to either of the existing

 

heat shields using the screws supplied with the extended

 

heat shield. Refer to vent components diagrams in the

 

back of this manual.

Rest the small leg on the extended heat shield on top

 

of the pipe section to properly space it from the pipe

 

section.

Important Notice: Heat shields may not be field constructed.

12 in X

(305 mm)

ROOF PITCH IS X/ 12 in.

(305 mm)

H (MIN.) - MINIMUM HEIGHT FROM ROOF TO LOWEST DISCHARGE OPENING

Angle

H (Min.) mm

0°-26.6°

500*

26.6°-30.3°

500*

30.3°-33.7°

500*

33.7°-36.9°

610*

36.9°-39.8°

760

39.8°-42.5°

990

42.5°-45.0°

1220.

45.0°-49.4°

1520.

49.4°-53.1°

1830.

53.1°-56.3°

2130.

56.3°-59.0°

2290.

59.0°-60.3°

2440.

*910 mm minimum in snow regions

Figure 10.19 Minimum Height From Roof To Lowest Discharge Opening

NOTICE: Failure to properly caulk the roof flashing and pipe seams may permit entry of water.

Caulk the gap between the roof flashing and the outside diameter of the pipe.

Caulk the perimeter of the flashing where it contacts the roof surface. See Figure 10.20.

Caulk the overlap seam of any exposed pipe sections that are located above the roof line.

CAUTION! Risk of Fire! Follow the requirements of the local standards and codes for minimum height require- ments from roof line.

Heat & Glo • VRT-AUB2123-980 Rev. H • 5/12

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Heat & Glo LifeStyle VRT-BZ-N-AUB Heat Shield Requirements for Horizontal Termination, Install Metal Roof Flashing

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