Heat Shield Requirements For Horizontal Termination; Install Metal Roof Flashing - Heat & Glo VRT-BZ-N-AUB Owner's Manual

I. Heat Shield Requirements for Horizontal
Termination
WARNING! Risk of Fire! To prevent overheating and fire,
heat shields must extend through the entire wall thickness.
• 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) minimum.
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 10.17.
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
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.
51
J. Install Metal Roof Flashing
• See minimum vent heights for various pitched roofs
• Slide the roof flashing over the pipe sections extending
Figure 10.18
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
• Caulk the perimeter of the flashing where it contacts the
• Caulk the overlap seam of any exposed pipe sections that
CAUTION! Risk of Fire! Follow the requirements of the
local standards and codes for minimum height requirements
from roof line.
Heat & Glo • VRT-AUB • 2123-980_R14 • 12/14
(Figure 10.18) to determine the length of pipe to extend
through the roof.
through the roof as shown in Figure 10.19.
20 in MIN.
24 in MIN.
(510 mm MIN.)
(610 mm MIN.)
LOWEST
DISCHARGE
OPENING
TERMINATION
CAP
H (MIN.) - MINIMUM HEIGHT FROM ROOF
TO LOWEST DISCHARGE OPENING
Angle
0°-26.6° .......................................................... 5 00*
26.6°-30.3° .......................................................... 5 00*
30.3°-33.7° .......................................................... 5 00*
33.7°-36.9° .......................................................... 6 10*
36.9°-39.8° .......................................................... 7 60
39.8°-42.5° .......................................................... 9 90
42.5°-45.0° ........................................................1 2 20
45.0°-49.4° ........................................................1 5 20
49.4°-53.1° ........................................................1 8 30
53.1°-56.3° ........................................................2 1 30
56.3°-59.0° ........................................................2 2 90
59.0°-60.3° ........................................................2 4 40
*910 mm minimum in snow regions
Minimum Height From Roof To Lowest Discharge Opening
diameter of the pipe.
roof surface. See Figure 10.19.
are located above the roof line.
HORIZONTAL
OVERHANG
VERTICAL
WALL
X
12 in
(305 mm)
ROOF PITCH
IS X/ 12 in.
(305 mm)
H (Min.) mm